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Page 1: Truss Screeds - Concrete Technology, Compaction,products.wackerneuson.com/manuals/Repair/117389_001Rep.pdf ·  Truss Screeds SP HP HPG REPAIR MANUAL 0117389 001 0799 en 01 173 89

www.wackergroup.com

Truss Screeds

SP HPHPG

REPAIR MANUAL

0117389 001

0799 en

0 1 1 7 3 8 9

Page 2: Truss Screeds - Concrete Technology, Compaction,products.wackerneuson.com/manuals/Repair/117389_001Rep.pdf ·  Truss Screeds SP HP HPG REPAIR MANUAL 0117389 001 0799 en 01 173 89
Page 3: Truss Screeds - Concrete Technology, Compaction,products.wackerneuson.com/manuals/Repair/117389_001Rep.pdf ·  Truss Screeds SP HP HPG REPAIR MANUAL 0117389 001 0799 en 01 173 89

CST REPAIR FOREWORD

Operating / Parts Information

You must be familiar with the operation of this machine before you attempt to troubleshoot or make any repairsto it. Basic operating and maintenance procedures are described in the operator’s / parts manual supplied withthe machine. The operator’s / parts manual should be kept with the machine. Use it to order replacement partswhen needed. If this manual becomes lost, please contact WACKER Corporation to order a replacement.

Damage caused by misuse or neglect of the unit should be brought to the attention of the operator, to preventsimilar occurrences from happening in the future.

This manual provides information and procedures to safely repair and maintain this WACKER model. For yourown safety and protection from injury, carefully read, understand and observe the safety instructions describedin this manual. THE INFORMATION CONTAINED IN THIS MANUAL WAS BASED ON MACHINES INPRODUCTION AT THE TIME OF PUBLICATION. WACKER CORPORATION RESERVES THE RIGHT TOCHANGE ANY PORTION OF THIS INFORMATION WITHOUT NOTICE.

i

This manual covers machines with Item Number:8291, 8292, 8293, 8294, 8295, 8296

Page 4: Truss Screeds - Concrete Technology, Compaction,products.wackerneuson.com/manuals/Repair/117389_001Rep.pdf ·  Truss Screeds SP HP HPG REPAIR MANUAL 0117389 001 0799 en 01 173 89

FOREWORD CST REPAIR

1028SD78

Serial Number

My machine’s numbers are:

RevisionItem NumberModel number

Rev. Serial Number

MENOMONEE FALLS, WI USA 53051

hpkWlbs

dB(A) Manuf. Yr.

Model

kg

MADE IN USA

Item Number

88

22

3

HPG 100HPG 100HPG 100HPG 100HPG 100

00082910008291000829100082910008291 101101101101101 0001010100010101000101010001010100010101

Nameplate

A nameplate listing the Model Number, Item Number, Revision, and Serial Number is attached to each unit.Please record the information found on this plate so it will be available should the nameplate become lost ordamaged. When ordering parts or requesting service information, you will always be asked to specifythe model, item number, revision number, and serial number of the unit.

Page 5: Truss Screeds - Concrete Technology, Compaction,products.wackerneuson.com/manuals/Repair/117389_001Rep.pdf ·  Truss Screeds SP HP HPG REPAIR MANUAL 0117389 001 0799 en 01 173 89

1A-1

CST REPAIR GENERAL 1A

Table of Contents

1.1 Safety Notes ......................................................................................... 1A-21.2 Laws Pertaining to Spark Arresters ....................................................... 1A-21.3 Tools ..................................................................................................... 1A-21.4 Reference Numbers ( ) ......................................................................... 1A-21.5 Ordering Parts ....................................................................................... 1A-21.6 Application ............................................................................................ 1A-21.7 Operating Safety ................................................................................... 1A-31.8 Operator Safety while using Internal Combustion Engines .................... 1A-41.9 Service Safety ....................................................................................... 1A-41.10 Dimensions and Weight ........................................................................ 1A-51.11 Technical Data ...................................................................................... 1A-5

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1A-2

1A GENERAL CST REPAIR

1.4 Reference Numbers ( )

Repair procedures contain reference numbers enclosedin parentheses ( ). These numbers refer to the itemnumbers shown on the appropriate assembly drawingsand other detailed drawings. They are included to aid themechanic in identifying parts and assembling compo-nents.

1.3 Tools

Since all possible problems encountered while repairingthe equipment cannot be anticipated, it is up to themechanic to use common sense and good judgment intool selection.

The use of any special tools is recommended only forthose operations where the use of conventional toolsproves inadequate.

Before substituting another tool or procedure, you shouldbe satisfied that neither personal injury nor damage to thecomponent will result.

1.5 Ordering Parts

The repair procedures contained in this manual do notinclude part numbers. For parts replacement informa-tion, refer to the Parts Manual originally supplied with theunit.

If the original Parts Manual has been lost, a replacementmanual may be ordered from WACKER Corporation.When ordering a replacement Parts Manual, please listmodel number, item number, revision number and serialnumber of machine.

1.1 Safety Notes

This manual contains NOTES, CAUTIONS, and WARNINGS which must be followed to prevent the possibility ofimproper service, damage to the equipment, or personal injury.

Notes: Notes appear in italics and contain additional information important to a procedure.

CAUTION: Cautions provide information important to prevent errors which could damage machine or components.

Warnings warn of conditions or practices whichcould lead to personal injury or death!

WARNING

1.2 Laws Pertaining to SparkArresters

Notice: Some states require that in certain locations,spark arresters be used on internal combustion engines.A spark arrester is a device designed to prevent thedischarge of sparks or flames from the engine exhaust.It is often required when operating equipment on forestedland to reduce the risk of fires. Consult the enginedistributor or local authorities and make sure you complywith regulations regarding spark arresters.

1.6 Application

This screed is a modern, high production machineintended to provide consolidation of concrete whilestriking off and closing concrete surfaces. The vibratorymotion, consolidation, and closing action are controlledby the engine speed. WACKER screeds are easily puttogether to form desired lengths for all finishing applica-tions. Finishing rates will depend on operator skill andjob conditions.DO NOT use this machine for any application other thanscreeding concrete.

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1A-3

CST REPAIR GENERAL 1A

1.7 Operating Safety

Familiarity and proper training are required for the safe operation of equipment! Equipment operated improperly or byuntrained personnel can be dangerous! Read the operating instructions contained in both this manual and the enginemanual and familiarize yourself with the location and proper use of all controls.

WARNING

NEVER use this machine for any application otherthan to screed concrete.

NEVER allow improperly trained people to oper-ate this equipment. People operating this equip-ment must be familiar with the potential risks andhazards associated with it.

NEVER touch engine or muffler while screed isoperating or immediately after it has been turnedoff. These areas get hot and may cause burns.

NEVER use accessories or attachments whichare not recommended by WACKER for this equip-ment. Damage to equipment and/or injury to usermay result.

NEVER operate machine with the belt guard miss-ing. Exposed drive belt and pulleys create poten-tially dangerous hazards that can cause seriousinjuries.

NEVER leave machine running unattended.

NEVER run machine indoors or in an enclosed areaunless adequate ventilation, through such items asexhaust fans or hoses, is provided. Exhaust gasfrom the engine contains poisonous carbon monox-ide gas; exposure to carbon monoxide can causeloss of consciousness and may lead to death.

ALWAYS keep hands, feet, and loose clothingaway from moving parts of equipment.

ALWAYS wear protective clothing when operatingequipment. For instance, goggles or safety glasseswill protect eyes from damage caused by flyingdebris.

ALWAYS read, understand, and follow proceduresin Operator’s Manual before attempting to operateequipment.

ALWAYS be sure operator is familiar with propersafety precautions and operation techniques be-fore using the screed.

ALWAYS close fuel valve on engines equipped withone, when screed is not being operated.

ALWAYS store equipment properly when it is notbeing used. Equipment should be stored in a clean,dry location out of the reach of children.

ALWAYS operate screed with all safety devicesand guards in place and in working order.

ALWAYS operate screed along even forms.Avoid objects protruding from concrete such asstakes or plumbing that would interfere withscreed operation.

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1A-4

1A GENERAL CST REPAIR

1.9 Service Safety

Poorly maintained equipment can become a safety hazard! In order for the equipment to operate safely and properlyover a long period of time, periodic maintenance and occasional repairs are necessary.

WARNING

DO NOT spill fuel when refueling engine.

DO NOT operate near open flames.

ALWAYS refill fuel tank in well-ventilated area.

ALWAYS replace fuel tank cap after refueling.

DO NOT smoke while operating screed.

DO NOT smoke when refueling engine.

DO NOT refuel hot or running engine.

DO NOT refuel engine near open flame.

1.8 Operator Safety while using Internal Combustion Engines

Internal combustion engines present special hazards during operation and fueling! Failure to follow the safetyguidelines described below could result in severe injury or death.

WARNING

DO NOT attempt to clean or service screed whileit is running. Rotating parts can cause severe injury.

DO NOT crank a flooded engine with the spark plugremoved on gasoline-powered engines. Fueltrapped in the cylinder will squirt out the spark plugopening.

DO NOT test for spark on gasoline-powered en-gines, if engine is flooded or the smell of gasoline ispresent. A stray spark could ignite fumes.

DO NOT use gasoline or other types of fuels orflammable solvents to clean parts, especially inenclosed areas. Fumes from fuels and solvents canaccumulate and become explosive.

ALWAYS keep area around muffler free of debrissuch as leaves, paper, cartons, etc. A hot mufflercould ignite them, starting a fire.

ALWAYS replace worn or damaged componentswith spare parts designed and recommended byWACKER for servicing this machine.

ALWAYS remove or disconnect spark plug on screedequipped with gasoline engines, before servicingscreed, to avoid accidental start-up.

ALWAYS handle cables carefully. The cables canfray and develop sharp edges which can causeserious cuts.

ALWAYS keep machine clean and labels legible.Replace all missing and hard-to-read labels. Labelsprovide important operating instructions and warn ofdangers and hazards.

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1A-5

CST REPAIR GENERAL 1A

1.10 Dimensions in. (mm)

1028SD83

W L

H

Model L W H

SP 50 60 (1524) 11 (279) 14 (356)SP 75 90 (2286) 11 (279) 14 (356)HP 50 60 (1524) 14 (356) 19 (483)HP 100 120 (3048) 14 (356) 19 (483)HPG 50 60 (1524) 14 (356) 19 (483)HPG 100 120 (3048) 14 (356) 19 (483)

1.11 Technical DataEngine

ekaMenignE adnoH adnoH

ledoMenignE 2XWQ1K061XG B,AQ1K042XG

rewoPdetaR )wk(pH )01.4(5.5 )9.5(8

gulPkrapS SE6RPBKGN SE6RPBKGN

paGedortcelE )mm(.ni )8.0–7.0(130.0–820.0 )8.0–7.0(130.0–820.0

renaelCriA tnemelElauD tnemelElauD

deepSenignE mpr 001±0063 001±0063

noitacirbuLenignE edargliossalcecivres

03W01EASFSroGS

03W01EASFSroGS

yticapaCliOenignE )lm(.zo )006(02 )0011(6.63

leuF enilosagdedaelnuralugeR enilosagdedaelnuralugeR

yticapaCknaTleuF )l(.stq )8.3(0.4 )1.6(4.6

)dloc(ecnaraelCevlaV )mm(.ni)51.0(600.0:telnI)02.0(800.0:teltuO

)51.0(600.0:telnI)02.0(800.0:teltuO

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1A-6

1A GENERAL CST REPAIR

Notes:

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2A-1

CST REPAIR OPERATION 2A

Table of Contents

2.1 Operation & Service Locations .............................................................. 2A-22.2 Before Starting ...................................................................................... 2A-32.3 To Run .................................................................................................. 2A-32.4 To Stop ................................................................................................. 2A-32.5 New Machine Set-up ............................................................................. 2A-52.6 Installing Screed Sections ..................................................................... 2A-52.7 Aligning the Screed ............................................................................... 2A-72.8 Winch and Cable ................................................................................... 2A-92.9 Freewheeling the Crank ........................................................................ 2A-92.10 Operating the Screed .......................................................................... 2A-102.11 Transporting ........................................................................................ 2A-10

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2A-2

2A OPERATION CST REPAIR

1029SD04

2.1 Operation & Service Locations

1 Power Section2 Center Section3 End Section4 Connector Bracket5 T-Bolts6 Exciter Shaft7 Pillow Bearings8 Rear Winch9 Front Winch10 Cable Guides11 Connector Bracket Bearing12 Connector Plate

1

2

3

4

5

6

7

9

8

10

11

12

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2A-3

CST REPAIR OPERATION 2A

b1

1015SD04 1005SD49

1005SD471015SD03

d

c1

b2

a2

2.3 To Run

1. Open fuel valve by moving lever to the right (a1).

2. If engine is cold, move choke lever to closed position(b1 ). If engine is hot, set choke to open position (b2 ).

3. Turn engine switch to “ON” (c1).

4. Pull starter rope (d).

Note: If the oil level in the engine is low, the enginewill not start. If this happens, check oil level and addoil as needed.

5. Open choke as engine warms (b2).

6. Allow engine to warm up a few minutes before oper-ating screed.

2.4 To Stop

1. Turn engine switch to “OFF” (c2).

2. Close fuel valve by moving lever to the left (a2).

Note: To stop engine quickly in an emergency, turnengine switch to “OFF” (c2).

a1

c2

2.2 Before Starting

Before starting screed, check the following:

• Screed is set and true• Screed has been coated with a release agent• Oil level• Fuel level• Belt tension• Condition of air filter• Condition of fuel lines• Shaft, weights, and bearings for looseness or mis-

alignment

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2A-4

2A OPERATION CST REPAIR

h 1028SD90

1028SD88

c

1028SD891028SD85

a

b

coarse fine

e

d

1028SD86

g

f

m

ik

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2A-5

CST REPAIR OPERATION 2A

Once the sections are in place, you may proceed withloosly bolting the connector plate to the fine side of thescreed. A tapered pin punch (h) inserted through the boltholes will aid in the alignment of the bracket. Repeat thisuntil all remaining mounting hardware is in place.

At this time, the T-bolts can be adjusted so that they areat an equal distance between the assembled sections(i). Install the connecting hardware (k) and tighten.Leave the jam nuts (m) loose for the next step which istruing the screed.

2.5 New Machine Set-up

Screeds are shipped from the factory in various sectionsand lengths. Sections need to be assembled and alignedprior to use. Follow Sections 2.6 Installing ScreedSections and 2.7 Aligning the Screed when setting upnew machines or when installing new sections.

2.6 Installing Screed Sections

Wacker screed sections are connected in two places: atthe top with T-bolts (a) and at the bottom with a connectorplate (b).

Each screed section has a coarse and a fine side,determined by the top tube T-bolt connector threads.These T-bolts are critical to alignment of the screed, soit is important to insure the integrity of the threads.

The connector plate permanently mounts to the coarseend of the screed section. It is secured to the section withshoulder bolts (c), lock nuts (d) and lock washers (e).The connector plate also carries a flange bearing (f) thatguides and aligns the eccentric shaft (g).

Note: Remember to always leave the connector plateattached to the coarse section end and disconnectfrom the fine side.

For initial setup:

1. Lay the sections of screed on a flat surface and installthe connector plate (b) to the coarse side.

2. Align the back T-blades and slide the two sectionstogether while guiding the eccentric shaft (g) into themating surface of the flange bearing (f).

Note: While assembling the sections, make sure thatthe T-bolts are threaded into the top tube so they don’tmake contact with each other and impede the align-ment of the connector plate.

Note: Once T-bolts have been adjusted at an equaldistance, tighten all hardware making sure screedsections stay level.

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2A-6

2A OPERATION CST REPAIR

1028SD92

1028SD93 1028SD94

1028SD91b

a

cd

e

f

1.5" (38 mm)

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2A-7

CST REPAIR OPERATION 2A

2.7 Aligning the Screed

Setting the screed for flatness can be done by usingoptical instruments, lasers or string line measurement.For our purpose we will discuss the basic string linetechnique, and set the screed for flatness with no crownor valley.

Although the screed sections were placed on a flatsurface during the initial setup, it is necessary to makefine adjustments to the trueness of the assembled screed.The goal is to adjust and maintain an equal distance fromthe bottom of the screed blade (a) to the taut string line(b).

Adjusting the screed

1. Place the machine on blocks or the forms it will ride on.

2. Stretch a string (b) along the back T-blade (a) of theassembled screed.

3. Insert spacers of equal thickness between the stringand the bottom of the blade (a wood 2x4 works well).The spacers (c) must be placed as close to the endsof the screed as possible.

4. Check the distance from the string to the screed ateach connection point. In this example we are usinga 1.5" (38 mm) spacer as shown

After checking all of the connections, start the adjustmentprocess at the point that is the farthest from true.

5. Begin adjustment by turning the T-bolts with a pliersor an adjustable wrench (d). One full revolution(360°) will raise or lower the screed approximately0.125" (3.2 mm).

6. Continue turning the T-bolt until the distance from thestring line to the screed blade is equal to the thicknessof the spacer.

7. Simultaneously, check the string line gap while ad-justing the height of the screed, until the desired resultis obtained.

Once the desired distance from the string line to thescreed is achieved at all of the connection points,

8. Tighten jam nuts (e).

9. Run the screed for approximately 5 minutes whilechecking for loose hardware, and tighten if neces-sary.

10. Check the alignment at the connection points (f)by using a taut string line and adjust (if needed)using the same procedures.

CAUTION: Always check the screed after it has beenlifted or moved.

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2A-8

2A OPERATION CST REPAIR

1028SD95c

1028SD96

g

1028SD97

f

h

b

a

d

e

j

k

1033SD04

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2A-9

CST REPAIR OPERATION 2A

2.8 Winch and Cable

Once the screed is properly adjusted you will need toroute the cables through the pulleys and guides.

Cable Set Up

The rear winch (a) is equipped with 60 feet of cable andis mounted over the back blade of the screed. Route thecable through the bottom pulley (c) and extend out so thegrab hook is secured to a solid point to winch against.

The front winch (b) is equipped with 100 feet of cable andmounted to the front of the screed. Route the cablethrough the upper pulley (d) and thread through theguides in the center of the screed (e).

Note: Routing the cables is made easier by free-wheeling the crank. See Section 2.9 Freewheelingthe Crank.

Once the cable is threaded through the guides on eachsection you are ready to route the cable through the endhandle.

1. Loosen the cable keeper plate (f) and run the cableover the fixed upper pulley (g) and down to therotating pulley (h) located at the bottom of the screed.

2. Rest the keeper plate on the upper pulley and tightendown to keep the cable on track.

Note: Pulley must be able to spin freely. Adjustkeeper plate accordingly.

3. Extend the cable out to a solid point to winch againstand you are ready to pour concrete.

2.9 Freewheeling the Crank

To make it easier when routing cables through guides orextending across forms, freewheeling the crank is anoption. To do this:

1. Give a hard counterclockwise turn to the crank handle(j) and continue until handle unthreads from winchspool assembly (k).

2. Cable is now able to be pulled freely to desired length.

3. Replace crank handle before operating screed.

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2A-10

2A OPERATION CST REPAIR

2.10 Operating the Screed

1. Set screed unit on top of forms. There should be a6–18" overhang on each end.

2. Extend both cables out so each grab hook is securedto a solid point to winch against.

3. Place one laborer every 10 ft. of screed to spread theconcrete to a level of 0.50–1.00" (12.7–25.4 mm)above the bottom of the front angle blade.

CAUTION: Allowing the level of concrete to drop belowthe blades will cause a low spot or a “valley” and createmore work to level the concrete.

CAUTION: Overloading with concrete can cause thescreed to ride up or bend creating high spots or “crowns”.

4. To achieve desired concrete results, the engine shouldbe kept at the lowest speed possible.

Note: The combination of slow travel speed, uni-formly spread concrete, and one designated operatorwill enhance the quality of the floor.

Stopping the screed:

If the screed has to be stopped in the concrete, it isimportant to do so quickly to prevent ridges. Beforestarting up again, pick up the screed and set it backapproximately one foot and proceed.

If there is a time delay between concrete pours, theunfinished concrete should be rough graded back andwell below the screed strike off height. This will preventa cold joint when screed operation is resumed.

2.11 Transporting

When transporting the screed:

• Turn the engine fuel valve to the off position.

• Make sure the screed is level to prevent fuel fromspilling.

• Secure the screed by tying it down with suitable rope.

WARNING

Let engine cool before transporting screed or storingindoors, to avoid burns or fire hazards.

CAUTION: To avoid damage to frame, disconnectscreed sections before transporting.

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3A-1

CST REPAIR MAINTENANCE 3A

Table of Contents

3.1 Engine Maintenance ............................................................................. 3A-23.2 Periodic Maintenance Schedule ............................................................ 3A-23.3 Changing Engine Oil ............................................................................. 3A-23.4 Air Cleaner ............................................................................................ 3A-33.5 Cleaning Sediment Cup ........................................................................ 3A-33.6 Adjusting Engine Speed ........................................................................ 3A-43.7 Carburetor Adjustment .......................................................................... 3A-43.8 Spark Plug ............................................................................................ 3A-53.9 Cleaning the Screed .............................................................................. 3A-53.10 Belt ........................................................................................................ 3A-63.11 Storage ................................................................................................. 3A-73.12 Troubleshooting .................................................................................... 3A-7

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3A-2

3A MAINTENANCE CST REPAIR

3.1 Engine Maintenance

The Periodic Maintenance Schedule below lists basic maintenance intervals for the engine and screed. Items listedmay be carried out by the layman with everyday hand tools. However, adjusting valve clearances may require theskill of a professional engine mechanic. Read the engine manufacturer’s Owner’s Manual for more information onengine maintenance.

3.3 Changing Engine Oil

Drain oil while engine is still warm.

1. Remove oil fill plug (a) and drain plug (b) to drainoil. Dispose of used oil in an appropriate manner.

2. Install drain plug.

3. Fill engine crankcase with recommended oil up tolevel of plug opening (c).

4. Install oil filler plug.

1005SD53

a

c

b

3.2 Periodic Maintenance Schedule

Dailybeforestarting

Every twoweeks or50 hrs.

Afterfirst 20hours

Everyyear or300 hrs.

Everymonth or100 hrs.

Check fuel level.

Check engine oil level.

Inspect air cleaner elements. Replace as needed.

Check and tighten external hardware.

Inspect fuel lines.

Check and grease bearings.

Clean air cleaner elements.*

Change engine oil.*

Clean cooling system.

Check and clean spark plug.

Clean sediment cup.

Check and adjust valve clearances.

* Service more frequently in dusty conditions.

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3A-3

CST REPAIR MAINTENANCE 3A

3.4 Air Cleaner

The engine is equipped with a dual element air cleaner—service frequently to prevent carburetor malfunction.

CAUTION: NEVER run engine without air cleaner.Severe engine damage will occur.

To service air cleaner:

1. Remove air cleaner cover (d). Remove both ele-ments and inspect them for holes or tears. Replacedamaged elements.

2. Wash foam element (f) in solution of mild detergentand warm water. Rinse thoroughly in clean water.Allow element to dry thoroughly.

3. Soak element in clean engine oil and squeeze outexcess oil.

4. Tap paper element (e) lightly to remove excess dirt.Replace paper element if it appears heavily soiled.

1001SD12

d

f

e

WARNINGNEVER use gasoline or other types of low flash pointsolvents for cleaning the air cleaner. A fire or explo-sion could result.

3.5 Cleaning Sediment Cup

1. Turn fuel valve off.

2. Remove sediment cup (g) and O-ring (h).

3. Wash them thoroughly in a nonflammable solvent.

4. Dry them and reinstall.

5. Turn fuel valve on and check for leaks.g

1001SD13

h

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3A-4

3A MAINTENANCE CST REPAIR

3.6 Adjusting Engine Speed

Adjust engine to a no load speed of 3600 ± 100 RPM.

To adjust engine speed:

1. Start engine and allow it to warm up.

2. Turn throttle stop screw (a) in to decrease speed, outto increase speed. Make sure throttle lever is touch-ing stop screw before measuring RPM. a

1001SD15

3.7 Carburetor Adjustment

The pilot screw (b) is fitted with a limiter cap to preventexcessive enrichment of the air-fuel mixture in order tocomply with emission regulations. The mixture is set atthe factory and no adjustment should be necessary. Donot attempt to remove the limiter cap. The limiter capcannot be removed without breaking the pilot screw.

b

1015SD05

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3A-5

CST REPAIR MAINTENANCE 3A

3.8 Spark Plug

Clean or replace spark plug as needed to ensure properoperation. Refer to the engine Owner’s Manual.

Recommended Plug: (NGK) BPR 6ES

1. Remove spark plug and inspect it.

2. Replace plug if the insulator is cracked or chipped.Clean spark plug electrodes with a wire brush.

3. Set gap to 0.28–0.31 (0.7–0.8 mm).

4. Tighten spark plug securely.

CAUTION: A loose spark plug can become very hotand may cause engine damage.

1006SD37

WARNING

The muffler and engine cylinder become very hotduring operation and remain hot for a while afterstopping the engine. Allow engine to cool beforeremoving spark plug.

0.7–0.8 mm

3.9 Cleaning the Screed

1. Remove any excess concrete with a high pressurewasher. Be sure to remove any concrete buildup onthe underside of the front angle blades and rear T-blades.

CAUTION: Do not use a hammer or wire brush toremove concrete from the screed.

2. Grease shaft bearings with Shell Alvania #2 or equiva-lent to force out any grit or water. Do not over grease;this will cause excess drag on the shaft.

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3A-6

3A MAINTENANCE CST REPAIR

Removal

1. Remove three screws mounting the beltguard (1) toengine bracket and upper frame support.

2. Loosen four screws mounting the engine (2) to theengine bracket.

3. Slide engine forward to relieve tension on belt (3) andremove belt from clutch (4) and pulley (5).

Installation

1. Loop belt (3) around clutch (4) and pulley (5).

3. Slide engine back on slots to create tension on thebelt. Adjust belt for 1/2"–5/8" deflection midwaybetween clutch and pulley. Tighten engine mountinghardware.

4. Mount beltguard (1) to tabs on engine bracket andupper frame support using mounting hardware.

3.10 Belt

1

1033SD34

2

3

4

5

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3A-7

CST REPAIR MAINTENANCE 3A

3.11 Storage

Before storing the screed for a long period of time:

• Close the fuel valve and remove and empty sedimentcup under carburetor.

• Grease the shaft bearings with a low temperaturegrease after final usage. Run the screed at operatingspeed for approx. one minute.

• Disconnect the fuel line from the carburetor. Placeopen end of fuel line into a suitable container and openfuel valve to drain fuel from tank.

• Loosen the drain screw on the carburetor and drainany remaining fuel from carburetor.

• Change the engine oil.

• Remove the spark plug and pour approximately onetablespoon (30 ml) of clean engine oil into the cylinder.Crank the engine a few turns to distribute the oil to theinside of the cylinder walls.

• Pull the starter rope slowly until resistance is felt andleave handle in this position. This ensures that theintake and exhaust valves are closed.

• Store screed in a clean, dry area or cover with aprotective tarp.

WARNINGGasoline is extremely flammable. Drain fuel tankin a well-ventilated area. DO NOT drain tank in anarea with flames or sparks.

3.12 Troubleshooting

If engine doesn’t start, check that:

• Engine switch is on “Start”.

• Fuel valves under fuel tank and on engine are open.

• Fuel tank has fuel.

• Choke lever is in correct position. Choke should beclosed when starting a cold engine.

• Spark plug is in good condition.

• Spark plug cap is tight.

• Engine oil level is adequate.

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3A-8

3A MAINTENANCE CST REPAIR

Notes:

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4A-1

CST REPAIR POWER & LINKAGE 4A

Table of Contents

4.1 Description ............................................................................................ 4A-24.2 Winch .................................................................................................... 4A-34.3 Engine ................................................................................................... 4A-44.4 Clutch .................................................................................................... 4A-54.5 Bearings ................................................................................................ 4A-64.6 Pulley .................................................................................................... 4A-7

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4A-2

4A POWER & LINKAGE CST REPAIR

4.1 Description

The eccentric weights (1) that are located near the shaftbearings (2) prevent shaft whip and extend bearing life.These eccentric weights are driven directly by the engineby means of a V-belt (3) and pulley (4).

The winch system consists of two cranks (5) located onsame end of screed for one person operation.

1

2

3

4

5

1033SD34

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4A-3

CST REPAIR POWER & LINKAGE 4A

4.2 Winch

Removal

1. Remove two screws (6), washers (7), and locknuts(8) mounting winch assembly (9) to bracket (10).

2. Remove cable clamp (11) securing hook (12) tocable. Pull cable from pulley (13).

Installation

1. Mount winch assembly (9) to bracket (10) usingscrews (6), washers (7), and locknuts (8).

Note: Configuration of winch assemblies are importantfor proper cable alignment.

2. Route cables through pulley (13) and hook (12).Secure hook to cable using cable clamp (11). Forproper cable setup, see Section 2.8 Winch and Cable.

6

87

9

10

13

11 12

1033SD37

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4A-4

4A POWER & LINKAGE CST REPAIR

4.3 Engine

Removal

1. Remove three screws (1) mounting the beltguard (2)to engine bracket and upper frame support.

2. Loosen four screws (3) mounting the engine (4) to theengine bracket.

3. Slide engine forward to relieve tension on belt (5) andremove belt from clutch (6) and pulley (7).

4. Remove screws (3) and carefully lift engine fromframe.

Installation

1. Mount engine (4) to engine bracket using four screws(3). Do not tighten—engine must be able to movewhen adjusting belt tension.

2. Loop belt (5) around clutch (6) and pulley (7).

3. Slide engine back on slots to create tension on thebelt. Adjust belt for 1/2"–5/8" deflection midwaybetween clutch and pulley. Tighten engine mountinghardware.

4. Mount beltguard (2) to tabs on engine bracket andupper frame support using screws (1).

1

7

2

3

4

5 6

1033SD35

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4A-5

CST REPAIR POWER & LINKAGE 4A

4.4 Clutch

Removal

1. Remove beltguard and belt as described in Section4.2 Engine.

2. Remove screw (8), lock washer (9), and flat washer(10) mounting clutch (6) to engine shaft. Pry clutchfrom engine shaft using two pry bars.

CAUTION: Use care not to damage clutch while prying.

3. Remove key (11).

Installation

1. Install key (11) on engine shaft. Apply anti-seizecompound to shaft.

2. Mount clutch (6) to engine shaft using flat washer(10), lock washer (9), and screw (8). Apply Loctite243 or an equivalent medium strength threadlockeron screw and torque to 13 ft.lbs. (18 Nm).

Note: See sealant and torque reference charts in backof book for appropriate threadlocking adhesives andtorque values.

8

9

10

6

11

1033SD36

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4A-6

4A POWER & LINKAGE CST REPAIR

4.5 Bearings

1030SD97

Pillow block bearing

1. Remove screws (1), flat washers (2), lock washers(3), and locknuts (4) to replace pillow block bearing(5) mounted to pillow block bearing bracket (6).

2. Clean and inspect bearing. Grease bearing with ShellAlvania #2 or equivalent using the grease fitting (7) toforce out any grit or water.

CAUTION: Do not over grease; this will cause excessdrag on the shaft.

3. Mount pillow block bearing (5) to bracket (6) usinghardware (1–4).

Flange bearing

1. Remove screws (8),flat washers (9), lock washers(10), and locknuts (11) to replace flange bearing (12)mounted to bracket (13).

2. Clean and inspect bearing. Grease bearing with ShellAlvania #2 or equivalent using the grease fitting (14)to force out any grit or water.

CAUTION: Do not over grease; this will cause excessdrag on the shaft.

3. Mount flange bearing (12) to flange bearing bracket(13) using hardware (8–11).

4

3

2

2

1

7

5

6

1033SD38

89

12 13

9 10 11

14

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4A-7

CST REPAIR POWER & LINKAGE 4A

4.6 Pulley

Removal

1. Remove screws (15) mounting pulley bushing (16) topulley (17).

2. Insert screws into threaded holes in pulley bushing.The threaded holes are used to push and release thepulley bushing from the pulley.

Note: When releasing the bushing, tighten screwsback and forth until bushing is free of pulley.

3. Remove screw from eccentric weight (18) and slideweight, pulley bushing, and pulley off of shaft (19) ifneeded.

Note: To enable parts to slide off of shaft, the pillowblock bearing (20) must be removed. See Section 4.5Bearings.

Installation

1. Adjust pulley (17) on shaft (19) so it is aligned withclutch (21).

CAUTION: Misaligning the pulley in either direction willcause excessive belt wear and slippage.

2. Lightly grease outer surface of pulley bushing (16)with Shell Alvania #2 or equivalent.

3. Insert screws (15) into through holes in pulley bush-ing (16). The through holes are used to pull the pulleybushing into the pulley (17) and also compress ontothe shaft.

1033SD39

1516

17

18

19

17

21

1033SD40

20

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4A-8

4A POWER & LINKAGE CST REPAIR

Notes:

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Use Of Threadlockers and Sealants

Threadlocking adhesives and sealants are specified throughout this manual and should be used where indicated.Threadlocking compounds normally break down at temperatures above 350° F (175° C). If a screw or bolt is hard toremove, heat it using a small propane torch to break down sealant. When applying sealants, follow instructions oncontainer. The sealants listed below are recommended for use on WACKER equipment.

SEALANTS

TYPE( ) = Europe COLOR USAGE PART NO. - SIZE

Loctite 222 Purple Low strength, for locking threads smaller than 1/4" (6 mm). 73287 - 10 mlHernon 420 Hand tool removable.Omnifit 1150 (50M) Temp. range, -65 to 300 degrees F (-54 to 149 degrees C)

Loctite 243 Blue Medium strength, for locking threads larger than 1/4" (6 mm). 29311 - .5 mlHernon 423 Hand tool removable. 17380 - 50 mlOmnifit 1350 (100M) Temp. range, -65 to 300 degrees F (-54 to 149 degrees C)

Loctite 271 / 277 Red High strength, for all threads up to 1" (25 mm). 29312 - .5 mlHernon 427 Heat parts before disassembly. 26685 - 10 mlOmnifit 1550 (220M) Temp. range, -65 to 300 degrees F (-54 to 149 degrees C) 73285 - 50 ml

Loctite 290 Green Medium to high strength, for locking preassembled threads 28824 - .5 mlHernon 431 and for sealing weld porosity (wicking). 25316 - 10 mlOmnifit 1710 (230LL) Gaps up to 0.005" (0.13 mm)

Temp. range, -65 to 300 degrees F (-54 to 149 degrees C)

Loctite 609 Green Medium strength retaining compound for slip or press fit 29314 - .5 mlHernon 822 of shafts, bearings, gears, pulleys, etc.Omnifit 1730 (230L) Gaps up to 0.005" (0.13 mm)

Temp. range, -65 to 300 degrees F (-54 to 149 degrees C)

Loctite 545 Brown Hydraulic sealant 79356 - 50 mlHernon 947 Temp. range, -65 to 300 degrees F (-54 to 149 degrees C)Omnifit 1150 (50M)

Loctite 592 White Pipe sealant with Teflon for moderate pressures. 26695 - 6 mlHernon 920 Temp. range, -65 to 300 degrees F (-54 to 149 degrees C) 73289 - 50 mlOmnifit 790

Loctite 515 Purple Form-in-place gasket for flexible joints. 70735 - 50 mlHernon 910 Fills gaps up to 0.05" (1.3 mm)Omnifit 10 Temp. range, -65 to 300 degrees F (-54 to 149 degrees C)

Loctite 496 Clear Instant adhesive for bonding rubber, metal and plastics;Hernon 110 general purpose. 52676 - 1 oz.Omnifit Sicomet 7000 For gaps up to 0.006" (0.15 mm)

Read caution instructions before using.Temp. range, -65 to 180 degrees F (-54 to 82 degrees C)

Loctite Primer T Aerosol Fast curing primer for threadlocking, retaining and 2006124 - 6 oz.Hernon Primer 10 Spray sealing compounds. Must be used with stainless steelOmnifit VC Activator hardware. Recommended for use with gasket sealants.

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Size Ft.Lb. Nm Ft.Lb. Nm Ft.Lbs. Nm Inch Metric Inch Metric

No.4 *6 0.7 *14 1.0 *12 1.4 1/4 5.5 3/32 -

No.6 *12 1.4 *17 1.9 *21 2.4 5/16 8 7/64 -

No.8 *22 2.5 *31 3.5 *42 4.7 11/32 9 9/64 -

No.10 *32 3.6 *45 5.1 *60 6.8 3/8 - 5/32 -

1/4 6 8.1 9 12 12 16 7/16 - 3/32 -

5/16 13 18 19 26 24 33 1/2 13 1/4 -

3/8 23 31 33 45 43 58 9/16 - 5/16 -

7/16 37 50 52 71 69 94 5/8 16 3/8 -

1/2 57 77 80 109 105 142 3/4 19 3/8 -

9/16 82 111 115 156 158 214 13/16 - - -

5/8 112 152 159 216 195 265 15/16 24 1/2 -

3/4 200 271 282 383 353 479 1-1/8 - 5/8 -

1 Ft.Lb. = 1.357 Nm 1 Inch = 25.4 mm* = In.Lb.

Metric Fasteners (DIN)

Inch Fasteners (SAE)

Size Ft.Lb. Nm Ft.Lb. Nm Ft.Lbs. Nm Inch Metric Inch Metric

M3 *11 1.2 *14 1.6 *19 2.1 7/32 5.5 - 2.5

M4 *26 2.9 *36 4.1 *43 4.9 9/32 7 - 3

M5 *53 6.0 6 8.5 7 10 5/16 8 - 4

M6 7 10 10 14 13 17 - 10 - 5

M8 18 25 26 35 30 41 1/2 13 - 6

M10 36 49 51 69 61 83 11/16 17 - 8

M12 63 86 88 120 107 145 3/4 19 - 10

M14 99 135 140 190 169 230 7/8 22 - 12

M16 155 210 217 295 262 355 15/16 24 - 14

M18 214 290 298 405 357 485 1-1/16 27 - 14

M20 302 410 427 580 508 690 1-1/4 30 - 17

8.8 10.9

TORQUE VALUES (Based on Bolt Size and Hardness) WRENCH SIZE

12.9 12.910.98.8

TORQUE VALUES

SAE 5 SAE 8

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Wacker Construction Equipment AG · Preußenstraße 41 · D-80809 München · Tel.: +49-(0)89-354 02 - 0 · Fax: +49 - (0)89-354 02-390Wacker Corporation · P.O. Box 9007 · Menomonee Falls, WI 53052-9007 · Tel. : +1-(1)(262) 255-0500 · Fax: +1-(1)(262) 255-0550 · Tel. : (800) 770-0957Wacker Asia Pacific Operations · Sunley Center, Unit 912, 9/F · 9 Wing Qin Street, Kwai Chung, N.T. · Hong Kong · Tel. + 852 2406 60 32 · Fax: + 852 2406 60 21