instruction,service and repair manual
TRANSCRIPT
POWERGRIPInstruction,Serviceand Repair Manual
PG and PGA Series
CONSTRUCTION EQUIPMENT ATTACHM
ENTS
®
2
Table of Contents
IntroductionTable of Contents .................................................................................................................................................... 2Product Overview .................................................................................................................................................... 3Operation Technology ............................................................................................................................................ 4General Safety Guidelines ...................................................................................................................................... 5Product Identification .............................................................................................................................................. 6
Installation and MaintenanceInstallation and Mounting ....................................................................................................................................... 7Hydraulic Requirements and Plumbing .................................................................................................................. 8Installing and Removing Hydraulic Lines ................................................................................................................ 9Maintenance .......................................................................................................................................................... 11Trouble Shooting Guide ....................................................................................................................................... 12
ToolsTools Required ...................................................................................................................................................... 13
DrawingsAssembly Drawing ................................................................................................................................................ 14Exploded View — Bucket and Actuator ............................................................................................................... 15Parts List — Bucket and Actuator ........................................................................................................................ 16Exploded View — Valve Manifold ........................................................................................................................ 17Parts List — Valve Manifold ................................................................................................................................. 17
DisassemblyProduct Inspection ................................................................................................................................................ 18Before Disassembly ............................................................................................................................................. 19Disassembly ......................................................................................................................................................... 20Parts Inspection .................................................................................................................................................... 23
AssemblySeal and Bearing Installation ................................................................................................................................ 24Assembly .............................................................................................................................................................. 26
Post AssemblyTesting .................................................................................................................................................................. 28Warranty Information ............................................................................................................................................ 30Service Offering .................................................................................................................................................... 31About Helac Corporation ...................................................................................................................................... 36
INTRODUCTION
3
Product Overview
Helac PowerGrip®, a multi-purpose bucket fromHelac Corporation, is a versatile, durable toolused as a trenching, grading or clamshell bucketand for gripping and loading. PowerGripincreases the tasks a single machine canperform, reducing the number of dedicated-taskmachines needed on a job site. PowerGrip alsoperforms as a general purpose excavating bucketfor everyday tasks.
Ideal for a broad range of applications, PowerGripcan be used during every step of the constructionprocess. Since 2001, contractors have come torely on PowerGrip for demolition, land clearing,tree/brush/stump removal, underground utilities,material handling and finish grading.
INTRODUCTION
Product Introduction
Each PowerGrip is built with the quality anddurability Helac is known for – so we offer a oneyear warranty to ensure your completesatisfaction.
When used in combination with Helac PowerTilt®,a swing attachment, you can achieve unmatched,hand-like manipulation and dexterity, dramaticallymaximizing productivity.
4
Operation TechnologyINTRODUCTION
PowerGrip uses Helac Corporation’s innovative,sliding-spline operating technology to convert linearpiston motion into powerful shaft rotation. Eachactuator is composed of a housing and two movingparts — the central shaft and piston.
Starting position
The piston is completely bottomed out.Bars indicate starting positions of piston andshaft. Arrows indicate directions they willrotate. The housing with integral ring gearremains stationary.
Ending position
When hydraulic pressure is applied to thepiston, it moves axially, while the helicalgearing causes the piston and shaft to rotatesimultaneously. Applying pressure to theopposite port will return the piston and shaftto their original starting positions.
Helical spline teeth on the shaft engage matchingteeth on the piston’s inside diameter. A second setof splines on the piston’s outside diameter meshwith the gear in the housing.
5
General Safety Guidelines
1. PowerGrip should only be used to performtasks for which it was designed. Abusing theproduct and/or using it for purposes for whichit was not intended can expose the operatorand others to hazards as well as result indamage to the PowerGrip, carrier and/orother attachments.
2. The operation of the PowerGrip Bucket issimilar to the operation of OEM buckets intrenching and material handling applications.However, the PowerGrip Bucket has theadded ability to grip, hold and lift materials in apick and place capability. This attachment isnot designed for long term holding ofmaterials.
Refer to the carrier manufacturer’s instructionsregarding safe material handling practices.
The bucket jaw should only be opened whenneeded for specific tasks. Failure to close thejaw can result in damage to the dipper arm.
3. Modification to the PowerGrip is done at theowner’s risk and may void the HelacCorporation, Attachments Division warranty.
4. It is the owner’s responsibility to be sure allsafety equipment is in place and operatingproperly at all times. If safety decals fade, aredamaged or become unreadable from adistance of 10 feet, they should bereplaced immediately.
Before beginning disassembly of the PowerGrip,there are several cautionary notices that should beconsidered. If you are not comfortable with repair ormaintenance of this product, contact your localdealer or Helac Corporation’s Service Departmentfor assistance.
INTRODUCTION
Cautionary Notices Other Safety Guidelinesand Precautions
6
General Safety GuidelinesINTRODUCTION
Helac Corporation does not assume anyresponsibility beyond the design and performance ofits construction equipment attachment products.The customer is solely responsible for engineering ofmating structures, fasteners, and other associatedcomponents related to the installation of the productand its ultimate application.
Important Notice
Product IdentificationA unique serial number is located on eachPowerGrip. This serial number is stamped onone end of the actuator and is also located on anIdentification (ID) Tag. It may be necessary toremove paint to expose the serial number.
5. PowerGrip should be used in conjuction withattachments that do not adversely affect thestability of the machine.
Be sure to post the warning decal providedby Helac Corporation to the cab of thecarrier machine.
7
Each PowerGrip is engineered for a specificbackhoe or excavator and is designed to be pinmounted directly to the machine. When using
INSTALLATION AND MAINTENANCEInstallation and Mounting
PowerGrip Installation
4. Slowly lift the PowerGrip to a safe height withthe bucket and boom cylinders.
5. Curl the bucket cylinder until the PowerGripand dipper holes align and install the bucketpivot pin. Rotate the pins as necessary andinstall the required retainers.
Installing the PowerGrip Bucketonto the Carrier
All PowerGrip models should be mounted to thecarrier according to the instructions outlined below.
1. Position the PowerGrip close to the carrierboom to ensure easy use of the lifting reachand range of the carrier boom.
2. Lower the dipper to approximately 2-3 inches(50-75 mm) above the PowerGrip. Roll out thebucket cylinder to lower the link bars to thePowerGrip.
3. Align the PowerGrip and link bar holes andinstall the link pin.
To remove the PowerGrip bucket, follow theinstructions outlined below.
1. Position the bucket so it is lightly supportedby the ground and in a position so it will notmove or fall when a pin is removed.
2. Remove the bucket pivot and link pins.
Removing the PowerGrip Bucketfrom the Carrier
PowerGrip Removal
Universal or Hydraulic Quick Couplers, contact therespective coupler manufacturer for instructionsand maintenance requirements.
8
* 3-10 second open/close time
PG-06 PG-07 PG-08
Hydraulic Requirements and Plumbing
Model Sizes PG06 PG07 PG08
Hydraulic PressuresCross Port Relief Valve Pressure (Opening)Cross Port Relief Valve Pressure (Closing)Circuit PressureMaximum Circuit Back Pressure
1,000-1,500 psi (70-103 bar)3,200-3,300 psi (220-230 bar)3,650-3,750 psi (250-260 bar)580 psi (40 bar)
84.8(1,390)
211(3,458)
in³(cm³)
gpm 2-7 (8-28)
3-10(12-39)
5-18(21-70)
6(1/4)
6(1/4)
6(1/4)
in(mm)
5/8(16)
5/8(16)
1/2(12)
3/8(10)
3/8(10)
118.5(1,942)
Displacement
RequiredOil Flow*
Hydraulic CircuitMin. Hose Tube Size
Whip Hose Size
Port Connections
The Typical PowerGrip Circuit Chart and the ToolCircuit Requirements Table (shown on this page)illustrate the control circuit requirements for thePowerGrip. The hydraulic pressures and flowrequirements must be observed or damage to theactuator can occur.
The installer of the PowerGrip is responsible forselecting control circuits that are compatible withthe excavator and meet the tool circuitrequirements. Helac can be contacted foradditional control circuits and methods forcontrolling the PowerGrip.
PowerGrips are equipped with astandard pressure control/loadlock manifold welded to thebucket shell.
Refer to the Suggested Hose Routings Diagramon Page 11 for the recommended routings.
Hydraulic Requirements
INSTALLATION AND MAINTENANCE
TypicalPowerTiltCircuit
Typical PowerGrip Circuit
Tool Circuit Requirements
(liters/minute)
SAEBSPP
in(mm)
Hydraulic Requirements and Plumbing
3/8(10)
9
Hydraulic Requirements and PlumbingINSTALLATION AND MAINTENANCE
Plumbing
When installing a new tool circuitor hydraulic lines, flush all the toolcircuit lines with hydraulic oil priorto connecting the PowerGrip. Thiswill help remove any contaminantsfrom the circuit components whichmay have accumulated duringmanufacturing and/or installation.
Hose and tube size recommendations can befound in the Tool Circuit Requirements Chartshown on Page 9.
The position of the hoses is important for reliableoperation. Refer to the Suggested Hose RoutingsChart on Page 11 for suggested hose routings.
Connect hydraulic hoses to the appropriate ports.Be sure the hoses do not cross, foul, crush orchafe when operating the PowerGrip or machine.Verify proper hose routing for all possiblepositions of the PowerGrip and all attachments,which are to be used with the PowerGrip. Repairany oil leaks immediately.
Hydraulic Requirements and Plumbing
Installing and RemovingHydraulic Lines
Port A2 Port A1Port P2 Port P1
Port V2 Port V1
The manifold incorporates two ports for hydraulichose connections, Port V1 and Port V2. Whenpressure is applied to Port V1 the jaw opens; whenpressure is applied to Port V2 the jaw closes.
After installing the PowerGrip onto the equipmentand attaching the hydraulic lines, it is important thatall safety devices are properly reattached.
10
INSTALLATION AND MAINTENANCEHydraulic Requirements and Plumbing
Suggested Hose Routings
11
MaintenanceINSTALLATION AND MAINTENANCE
1. Grease the thrust washers at the two greasefittings with a high quality Lithium-basedgrease. Apply grease until clean grease flowsfrom the grease reliefs. Severe operatingconditions such as abrasive dust or prolongedsubmersion in water may require more frequentgrease applications.
2. Make sure the grease reliefs are functioningproperly. Open or replace non-functioninggrease reliefs immediately.
Daily
Never replace the grease reliefvalves with grease fittings or plugs.
Do not operate the PowerGrip if thegrease reliefs are not functioning.
3. Inspect the PowerGrip for loose, worn ordamaged components and replace orrepair immediately.
4. Mounting pins should be greased uponinstallation and thereafter according to theequipment manufacturer's instructions.
12
Troubleshooting GuideINSTALLATION AND MAINTENANCE
Problem Possible Cause SolutionPowerGrip jaw does nothold position
Jaw moves only inone direction
PowerGrip Bucket hasspongy feel
Side to side (axial play)movement of jaw
PowerGrip will not acceptgrease at grease fittings
Excessive force being appliedto jaw is causing relief valveto open.
A bi-directional hydraulic motorcontrol valve is being usedwithout the bucket loadcontrol valve.
Load control valve is leaking.
Seals are leaking oil.
Single directional control valveis being used.
Load control valvemanifold is obstructed.
Hydraulic hose isinternally damaged.
Air in PowerGrip actuator orhydraulic circuit.
Worn or missingthrust washers.
Grease relief not functioning orhas been replaced with greasefitting or plug.
This is normal. The relief valvelimits the force applied to thebucket jaw to prevent damageto the unit.
Install bucket loadcontrol valve.
Test, repair or replaceas needed.
Test and replace seals asnecessary.
Replace with a bi-directionalcontrol valve.
Clean manifold passageway(s).
Test and replacedamaged hose.
Bleed air from circuit andcheck for cause.
Replace or installthrust washers.
Clean or replace greaserelief valves.
13
Tools Required
Several basic tools are required for the disassemblyand reassembly of the PowerGrip. The suggestedtools are outlined below:
1. Flashlight
2. Seal tool
3. Pin spanner wrench
4. Two metal dowels
5. Felt or paint marker
6. Pick
7. 1/8" T-handle allen wrench
8. Strap wrench
9. Plastic or rubber mallet
10. Utility knife
11. Two pry bars
12. Metal punch
13. Plastic drift
14. Tape measure
15. One #8-32 x 1.00" or longer machine screw
1.2.
3.
5.
6.
7.
8.
14.
13.
12.
10.
9.
11.
TOOLS
4.
The seal tool is merely a customized standardflat head screwdriver.
1. Heat the flat end with a torch until it glows.
2. Secure the heated end of the screwdriverin a vise and bend the heated end to aslight radius.
3. Round off all sharp edges of the heated tipto a polished finish. The tool may be modifiedslightly to your own personal preference.
Making a Seal Tool
1.
2.
3.
6.
7.
9.
15.
14.
10.
12.5.
8.
4.
11.
11.
13.
14
Assembly DrawingDRAWINGS
DETAIL A
— Version 1SCALE 1 : 2
— Version 2SCALE 1 : 2
15
Exploded View — Bucket and ActuatorDRAWINGS
***
* WELDED TO BUCKET** WELDED TO DRIVE HUB*** NOT INCLUDED ON ALL MODELS
16
Parts List — Bucket and ActuatorDRAWINGS
PARTSItem Description Quantity01 ..... Housing .....................................................102 ..... Shaft ..........................................................103 ..... Piston Sleeve ............................................104 ..... Drive Hub ..................................................205 ..... Lock Nut ....................................................206 ..... Spline Adaptor ..........................................210 ..... Cover Plate ...............................................215 ..... Housing Collar ..........................................216 ..... Bucket .......................................................117 ..... Bucket Jaw................................................118 ..... Bucket Tooth Assembly ............ As ordered101 ... Fitting Plug ..............................................10105 ... Retainer Pin ..............................................4107 ... Grease Relief Cover .................................2122 ... Grease Fitting ...........................................2123 ... Grease Relief Fitting .................................2124 ... Port Plug-Fitting G-1/4" BSPP....................2128 ... Port Plug-Fitting, 3/8" SAE -6 .....................2
SEALSItem Description Quantity
200 ... Seal Kit (includes all seals below) .............1207 ... O-Ring, Collar ...........................................2230 ... O-Ring, Drive Hub ID ................................2231 ... Back-Up Ring, Drive Hub ID .....................2232 ... O-Ring, Lock Nut ID* ................................2233 ... Back-Up Ring, Lock Nut ID* ......................2234 ... Seal, Piston ID ..........................................1235 ... Seal, Piston OD ........................................1236 ... Seal, Exclusion .........................................2237 ... O-Ring, Exclusion .....................................2238 ... Seal, Drive Hub .........................................2
BEARING KITItem Description Quantity
300 ... Bearing Kit( (includes all bearings below) .......................1341 ... Bearing, Drive Hub ....................................2342 ... Bearing, Piston ID .....................................1343 ... Bearing, Piston OD/Drive Hub ..................3344 ... Thrust Washer ..........................................2
MISCELLANEOUSItem Description Quantity
451 ... Warning Decal (see page 36) ...................119 ..... Bucket Pin, Dipper (not shown).................120 ..... Bucket Pin, Link (not shown) ....................1
NOTE: Seal Kits and Bearing Kits are separate,individual kits. They are not available as a single,combined Seal and Bearing Kit.
* Not included on all models
17
Parts List — Valve Manifold
DRAWINGS
MANIFOLD PARTSItem Description Quantity
414 ........ Low Pressure Cartridge ............................ 1415 ........ High Pressure Cartridge ............................ 1416 ........ Load Holding Cartridge ............................. 1420 ........ Port Plug ...................................................1421 ........ Relief Manifold-Block Only ....................... 1
Exploded View — Valve Manifold Assembly
The manifold, cartridge valves and related parts are identical for all PowerGrip Models. Manifold can be provided with either SAE or BSPP ports. Seals are only available in kit form; indvidual seals are not available.
18
Product InspectionDISASSEMBLY
Make sure the PowerGrip is thoroughly cleanedprior to disassembly. Inspect the PowerGrip forcorrosion prior to disassembly.
Severe corrosion can make it difficult to removethe fitting plugs (101) and lock nuts. If corrosionis evident, soak with penetrating oil for severalhours before disassembly.
All numbers that appear inparenthesis ( ) in the followingsections are referring to items onPage 17.
19
Before DisassemblyDISASSEMBLY
1. Close jaw fully and release hydraulicpressure. Secure jaw to bucket shell bytack welding tabs at three locations asshown on both sides of the jaw.
2. Mark the port access holes with P1 and P2for future reference during disassemblyand assembly.
A
B
C
C
AB
20
DisassemblyDISASSEMBLY
1. Remove the hydraulic tubes from P1 and P2.Using a 1/8" T-handle allen wrench, removethe 5 SAE #2 fitting plugs (101) from each locknut (05).
05
1011/
8" hex
wrench
05
105
machinescrew
05
pinspannerwrench
P2
P2
P1
P1
P1
P1 side
P1 side
P1 side
Disassembly
It is very important to record themeasurement of the pistonsleeve position before furtherdisassembly. Proper pistonsleeve position ensures that thebucket will close before the pistonsleeve reaches its internal stop. Ifimproperly positioned, the pistonsleeve will bottom out against thering gear causing damage to thegear teeth.
Hydraulic oil will discharge whenhub is removed.
01
4. Using pry bars, remove P1 drive hub (04) first,then P2 drive hub (04).
2. Remove the two retainer pins (105) located oneach lock nut (05) using a #8-32 x 1.00"machine screw. Thread the machine screwinto the end of each retainer pin (105) andpull on the machine screw to remove theretainer pin (105).
3. Using pin spanner wrench or two metaldowels and a pry bar, unthread and removeboth lock nuts (05).
5. Measure distance from piston sleeve (03) toedge of housing (01) bore at P2 Side.Record measurement.
21
DisassemblyDISASSEMBLY
231 230
05
9. Remove the bearings (341,343) fromboth drive hubs (04).
341
04
343
04
10. Remove the drive hub seal (238) from thedrive hubs (04) using a seal tool or autility knife.
02
02
03
01
6. Using a plastic mallet, drive the shaft (02)toward the P1 end until the shaft protrudes farenough to grasp. Carefully pull the shaft (02)out from the P1 side of the actuator.
7. Using a plastic drift and plastic mallet,carefully drive the piston sleeve (03) out theP2 port side of the actuator housing (01).
Be sure the piston sleeve (03) andhousing (01) are not damagedduring disassembly.
8. Some models have seals on the ID and / orOD of the lock nuts (05). If they exist, removethe seals and back-up rings from both locknuts using a seal tool.
As seals are removed, note theirorientation. Many seals work inone direction only.
22
DisassemblyDISASSEMBLY
11. Remove the thrust washer (344) from thedrive hubs (04).
12. Remove the exclusion seal (236) from thedrive hubs (04) using a seal tool or autility knife.
13. Remove the o-ring exclusion (237) fromeach drive hub (04) using a seal tool.
237
04
344
04
236
04
14. Remove the drive hub ID o-ring (230) anddrive hub back-up ring (231) from each drivehub (04).
15. Place the piston sleeve (03) flange side up toaccess the seals and bearings. Remove thepiston OD bearing (343) from the pistonsleeve (03).
343
03
231
04
230
238
04
23
DisassemblyDISASSEMBLY
234
3
03
342
17. Remove the piston ID bearing (342) from thepiston sleeve (03) using a seal tool.
03
235
16. Remove the piston OD seal (235) from thepiston sleeve (03) using a seal tool or autility knife.
18. Remove the piston ID seal (234) from thepiston sleeve (03) using a seal tool.
Parts Inspection
1. Prior to inspection, clean all parts in a washtank and dry with compressed air.
2. Housing — Inspect the cylinder bore for wearand scratches. Local polishing can repairminor scratches and damage. Inspect allbearing and seal surfaces for signs of wear ordamage. Check the condition of the gearteeth for any signs of extreme wear orchipping. Inspect the housing for signs ofdamage or cracking.
3. Shaft — Check the shaft surface forscratches from the piston seal or otherdamages. Small or minor scratches can becarefully polished. Examine the condition ofthe gear teeth.
4. Drive Hubs — Inspect the ID and OD splinesfor signs of chipping or serious wear.Evaluate the surface finish of the sealgrooves.
5. Lock Nuts — Inspect the threads for gallingor cross threading. Make sure that the endcap spins freely on the threads of the shaft.Evaluate the surface finish of the sealgrooves.
6. Piston Sleeve — Inspect the condition of thegear teeth. Evaluate the surface finish of theseal grooves.
7. Seals — Helac recommends replacement ofall seals and bearings.
24
Seal and Bearing InstallationASSEMBLY
236
04
344
04
Lightly oil all seals, sealgrooves and bearings priorto installing.
1. Install the exclusion seal (236) onto each drivehub (04) using a seal tool.
2. Lightly grease the thrust washer (344) andinstall onto each drive hub (04).
3. Install drive hub seal (238) onto each drivehub (04).
4. Install the bearings (341,343) onto eachdrive hub (04).
5. Install the drive hub ID o-ring (230) anddrive hub ID back-up ring (231) into eachdrive hub (04) .
The orientations of seals are vitalto PowerGrip functioning safelyand correctly. Refer to theassembly drawing and details onpage 15 for the correct orientationof each seal.
04
231 230
343
04
341
04
238
04
25
Seal and Bearing InstallationASSEMBLY
6. Depending on model, install the exclusiono-ring seal (237) into the ID of the drivehub (04) or the OD of the locknut (05).
7. Install the piston OD seal (235) (with back-up rings if applicable) onto the pistonsleeve (03) using a seal tool.
8. Install the piston OD bearing (343) ontothe piston sleeve (03).
343
03
235
03
237
04
9. Install the piston ID seal (234) (with back-uprings if applicable) into the piston sleeve (03).
10. Install the piston ID bearing (342) into thepiston sleeve (03).
11. Some models have seals on the ID and / orOD of the lock nuts (05). If they exist, installthe seals and backup rings onto lock nuts.
Be sure the lock nut ID back-upring (233) is farthest from thethreads.
234
03
342
03
232
05
233
26
AssemblyASSEMBLY
1. Install the piston sleeve (03) into the housing(01) from the P2 side, engage the teeth andpush in until the measured distance from theback of the piston sleeve (03) to outer edge ofthe housing bore at the P2 side is as recordedduring step five of disassembly on page 21.
2. Install the shaft (02) in the P1 side andposition it inside the housing (01) until it iseven on both P1 and P2 sides, while keepingthe piston (03) to housing bore distanceunchanged. Confirm piston (03) to housingdistance and adjust as needed whilemaintaining shaft (02) position.
Proper piston sleeve positionensures that the bucket will closebefore the piston sleeve reachesit’s internal stop. If improperlypositioned, the piston sleeve willbottom out against the ring gearcausing damage to thegear teeth.
3. Coat the drive hub ID splines with nickel anti-seize (Loctite 77169 or equivalent). Installdrive hubs (04). If OD splines do not alignwith jaw splines, remove hub and index thehub until both ID and OD splines align.
4. Coat the lock nut (05) threads, OD, andflange mating surface with nickel anti-seize(Loctite 77169 or equivalent).
01
P2 side
03
03
01
02
01
02
04
01
Lightly oil inside the housing andeach component as installed.
27
AssemblyASSEMBLY
5. Install P1 and P2 lock nuts (05) onto shaft(02) and tighten snug.
6. Using a pin spanner wrench or two metaldowels and a pry bar, tighten the P1 lock nut(05) to 120 ft-lbs (162 Nm). Then loosen thelock nut just far enough until the two retainerpin (105) holes line up.
7. Install the two retainer pins (105) and the fivefitting plugs (101) into the lock nut (05) on theP1 side.
1/8" hex
wrench
#8-32 x 1.00"machine screw
P1 side
P1 side
P1
P1
05
101
05
105
8. Using a pin spanner wrench or two metaldowels and a pry bar, tighten the P2 lock nut(05) to 120 ft-lbs (162 Nm). Without overtightening, adjust the lock nut as needed toinsert the two remaining retainer pins (105).Install and tighten the five fitting plugs (101)into the lock nut (05).
9. Remove the three tabs installed to secure thejaw to the bucket shell prior to disassembly.
pin spannerwrench
05
04
retainer pin(105) hole
P1 side
P1
C
AB
05
02
28
POST ASSEMBLYTesting
See valve manifold drawing on page 18 forlocations of ports and valves.
Valve DesignThis valve has three separate cartridges that worktogether to provide:
1. Load holding with very low leakage to thetool circuit.
2. High pressure relief protection(when clamping).
3. Low pressure relief protection (when open andbeing pushed closed).
Testing Load Control Valve
1. Connect a 5,000 psi (350 bar) test gauge intothe hydraulic line to Port P2. Pressurize P2until the jaw closes fully.
If the jaw is not completely closed,hydraulic fluid will exhaust fromPort P1 at a high velocity whenPort P1 is uncapped.
Testing for Internal Leakage
2. Remove and cap the hydraulic line attachedto Port P1. Pressurize port P2 to 2,500 psi(175 bar). Check for leakage at port P1 andfrom around the main shaft and end capseals. Leaks indicate worn or improperlyinstalled parts.
If symptoms of poor performance develop, refer tothe Troubleshooting Guide on Page 15 for generalinstructions. If you need help with more specificapplication issues, contact Helac Corporation’sService Department.
It is the responsibility of your service technician toverify that the carrier and hydraulic circuit areoperating correctly. Because the PowerTiltreceives its power from the carrier, a thoroughcheck of the carrier hydraulic system is mandatorybefore performing any PowerTilt service oradjustments.
Testing the Carrier'sHydraulic System
29
POST ASSEMBLYTesting
Bucket Side
Dipper Side
Hydraulic Logic of Load Control Manifold
1. Hydraulic oil should require 3,000 psi (206bar) to flow from port A2 to port V2.
2. Ports A1 and V1 are always common toeach other.
3. With Port A1 blocked, hydraulic oil shouldrequire 1,000 to 1,500 psi (69 to 103 bar) toflow from port V1 to port A2/V2.
4. With Port A1 blocked and pressure applied toport V1, Port A2 should be common toport V2.
5. With Port A2 blocked and pressure applied toport V2, it should require 3,200 psi (220 bar)to pass oil to port V1/A1.
30
Warranty InformationPOST ASSEMBLY
Helac Corporation warrants its products to be free from defective material and factory workmanship for aperiod of one (1) year or 1000 service hours, whichever occurs first, for Helac Corporation approvedapplications, defined as medium duty service on the machine for which the Helac Attachment(PowerTilt® or PowerGrip®) was originally designed and with cross port or work port relief valvesinstalled according to Helac Corporation ’s recommendations. The warranty period shall begin when theHelac Attachment is first placed into service as documented by the return of the Warranty RegistrationCard to the factory. If the Registration Card is not returned, the warranty period will commence from thedate the Helac Attachment was originally shipped from the factory. For products delivered fromauthorized dealer inventories, the warranty period shall commence no more than one (1) year from dateof shipment from the factory.
This warranty shall be voided as to any products which have been repaired, worked upon, or altered bypersons not authorized by Helac Corporation, or which have been subject to misuse, misapplication,negligence, accident, overload, field alteration, severe use or service applications beyond what the HelacAttachment was designed to perform. In no event shall Helac Corporation be liable for any incidental orconsequential damages or claims including, but not limited to, the application in which the product wasplaced, field travel, freight charges, oil samples, downtime, etc. Warranty related repair and/or replacementissues will be satisfied according to how the product was originally purchased:
Direct Sales to End UsersThis warranty covers repair or replacement of product or parts, which under normal use and servicedisclose defective material and/or factory workmanship. Only repairs completed at the Helac factory orfactory replacement (at Helac ’s option) will satisfy claims under this warranty. Products under warrantyshall be returned to the Helac factory for evaluation and repair. The customer shall contact the HelacWarranty Department for a Return Authorization Number prior to shipping the product in question. Thefactory will not accept products returned without a Return Authorization Number. Transportation shall beprepaid by the purchaser. On receipt, Helac factory personnel will inspect the product for warrantableissue(s).Upon warranty acceptance, Helac Corporation will repair the warranty issue(s)of the product at nocost to the customer and return the product freight prepaid. If it is determined that the issue(s)are notcovered by the warranty, the product (repaired or not) will be returned COD to the customer.
Sales Through Equipment DealersThis warranty covers labor at predetermined, fixed flat rates and repair or replacement of products or parts,which under normal use and service disclose defective material and factory workmanship. Claims underthis warranty will be satisfied only by repair or replacement of the unit or any defective part there of.Products under warranty shall be returned to a factory authorized dealership location, transportationprepaid by the purchaser, for inspection by the dealer with factory consultation. Warranty repairs are onlyto be made at the selling dealer ’s location according to time maximums and at rates pre-established byHelac Corporation. Helac Corporation reserves the right to make changes in the design or construction ofany of its products at any time without incurring any obligations to make changes or alterations to productspreviously sold. Helac Corporation reserves the right to alter this warranty and/or its terms at any time. Thiswarranty is in lieu of all other and/or prior warranties, expressed or implied, and no other company orperson is authorized to represent or assume for Helac Corporation any liability in connection with the saleof Helac Corporation products other than set forth herein.
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Service OfferingPOST ASSEMBLY
Helac Corporation’s Service Department caneffectively tackle your service and repair needs andprovide responsive customer support. Our 30 yearsof extensive rotary actuator expertise coupled withan in-depth understanding of our customers’expectations, enables us to quickly and efficientlyservice your needs with the following three offerings:
Technical Support
Repair Service
Parts Service
Our service representatives have been trained toanswer the majority of your technical questionsduring the initial call. If your question can’t beanswered immediately, our representative will returnyour call quickly.
Call our Technical Support Department at+1 800 797 8458 (U.S. and Canada) or+1 360 802 1039 (Worldwide) from 7 a.m. to 4p.m. PST on weekdays (excluding holidays), ore-mail us at [email protected].
Our fully equipped repair department ensuresfactory specifications and customer expectationsare met quickly and efficiently. Helac PowerTilt andPowerGrip can also be serviced through your localequipment dealer.
Call or e-mail our Repairs Department at+1 800 797 8458 (U.S. and Canada),+1 360 802 1039 (Worldwide) [email protected].
Our parts service team offers same day or 24 hourturnaround, depending on when the call is received,on all common items.
Spare parts can be ordered online atwww.helac.com/service/parts.asp, or by calling ore-mailing our Parts Department at+1 800 797 8458 (U.S. and Canada),+1 360 802 1039 (Worldwide) [email protected].
When ordering Spare and Replacement Parts,including Seal and Bearing Kits, please have theserial and/or model number available.
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HELAC CORPORATION225 BATTERSBY AVENUE • ENUMCLAW, WA 98022 USAPHONE 360.825.1601 • FAX 360.825.1603 • www.helac.com
®
About Helac Corporation
As a leader in the fluid power industry for over 40 years, Helac Corporation manufactures a comprehensive line of hydraulic rotary actuators and construction equipment attachments. Helac rotary actuators are best known for their tremendous torque output, compact dimensions, exceptional load bearing capability and rugged,
reliable performance. Helac PowerTilt and PowerGrip, two specialty products, increase the utilization of backhoes and excavators. Over 1,000 worldwide customers in diverse markets depend on Helac's product lines to provide product quality, reliability, ease of use and durability.
© 2012 Helac Corporation. All rights reserved. US Patent #6370801
HA PGSM/10.12