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Rev. Date 11/2/04 Bulletin MD-2-1

GENERAL

This ser

vice bulletin provides the necessary informationto inspect, lubricate, and repair the Type BC capsulewheel assemblies. Inspection and lubrication arecovered under the maintenance topic followed by therepair instructions covered under the topic, WheelAssembly Repair.

Type BC capsule wheel assemblies are available insizes from 9 to 15 inches. These wheels are utilized onthe trolley drive and idler wheel applications.

MAINTENANCE

General

The f

ollowing topics cover the general inspection whichshould be periodically performed on wheel assemblies.Lubrication information, specifications, and bolt torquesare also provided under this topic.

Inspection

P

eriodic inspections of the wheel assemblies arerecommended to ensure proper operation andlubrication. The frequency of the inspection depends onthe operating environment of the wheel assemblies.Inspection of the wheel assemblies should include, butnot necessarily be limited to, the following:

Perform inspection as follows:

1. Move crane to a suitable area away from machineryand personnel where the inspection can beperformed.

! DANGERWARNING

Electric current can cause injur

y or death.

Disconnect, lock open, and tag the powersource which feeds the crane or equipment

to prevent power from being applied to

machinery while inspections and repairs arebeing performed.

2.

Disconnect, lock open, and tag the power sourcewhich feeds the equipment being work upon.

3. Check for loose, damaged or missing hardwareRep lace damaged or m iss ing hardware

immediately. Tighten loose hardware to the propetorque as listed under the repair topic.

4. Inspect the wheel flanges for wear and signs of theflange rubbing against the rail.

5. Inspect the wheel for flat spots and any unusuawear patterns or markings.

6. Inspect the wheel bearings for improper lubricationor excessive wear.

7. Inspect the wheel for excessive float.

NOTICE

Wheel fl

oat is the amount the wheel movesacross the rail from flange to flange. Wheel floatis approximately 3/4 to 1 inch for straightwheels, and 1-1/4 to 1-1/2 inches for taperedwheels.

If any of the above conditions exist, repair or replace thedamaged parts as described under the repair topic.

Lubrication

Lubr

icat ion of the wheel bear ings is required

periodically. The amount and frequency of lubricationwill depend on the operating environment of the wheeassemblies. However it is recommended that lubricationperiods never exceed three months.

The bearing housings on each side of the wheeassemblies are provided with a lube fitting to allowapplication of grease to the wheel bearings. Applymultipurpose grease to each lube fitting at three monthintervals, or shorter periods if usage dictates the need

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ype BC Capsule Wheel Assemblies

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Type BC Capsule Wheel Assemblies

Ref

er to Table 1, Lubricant Specifications, for therecommended lubricant specifications.

NOTICE

At the time of the pr

inting of this Bulletin, themanufacturers l isted in the lubr icat ion

specification complied with the requirements ofP&H 472. Manufac turers can changelubrication formulations from time to timewithout advising Morris Material Handling. Toprevent any possible conflict obtain currentcopy of P&H lubrication specification and workwith your lubrication supplier to find a productwhich satisfies the specification for use in thedesired ambient

NOTICE

There are v

arious types of greases some ofwhich are not compatible with each other.Thickeners such as clay base, polyurea orcalcium may result in incompatibilities. Alwaysconsult your lubricant supplier before changingtypes or brands of grease to prevent possibleproblems

WHEEL ASSEMBL

Y REPAIR

General

The repair of the wheel assemb

lies is limited to the

replacement of worn or damaged components. Refer tothe following procedures for information on the removal,disassembly, cleaning and inspection, assembly, andinstallation of the Type BC capsule heel assemblies

Remo

val

The remo

val and installation procedures outlined in thispublication are general in nature due to the wide rangeof applications in which these wheels are used. Use thefollowing procedure to remove either a drive or an idlerwheel assembly:

NOTICE

The remo

val and installation the idler wheelassembly is identical to that of the drive wheelassembly with the exception of the removal andinstallation of the drive gear case, and thereforeboth are covered by the same procedure.

1. Move the crane to a suitable maintenance areaaway from personnel and machinery.

! DANGERWARNING

Unintent ional crane mo

vement or hazardous voltage can cause severe injuryor death during maintenance or service.

Before working on the wheel assemblies

shut down the operation of the crane,disconnect electrical power, use lockoutand tagout procedures, and try controls to

verify power is removed.

2.

Disconnect, lock out, and tag the power sourcewhich feeds the equipment being worked upon.

3. Disconnect or remove the drive gear case or lineshaft coupling as necessary, as described underthe applicable procedures outlined in the serviceinstructions specific to the drive gear case.

NOTICE

The dr

ive gear case may not need to beremoved to service the wheel assembly, it mayonly need to be disconnected from the driveaxle. Determine this by visually inspecting thetype of gear case utilized, and the manner inwhich it is connected to the driven wheel.

! DANGERWARNING

W

orking on overhead crane bridge or trolleywheels without first blocking the structure

to prevent movement is hazardous, and mayresult in the injury or death of personnel.

Install wheel chocks or other blockingdevices at each wheel location prior to

servicing a wheel assembly.

4.

Install wheel chocks on the wheel assembliesopposite the wheel being serviced. Secure chocksto the rail to prevent movement of the trolley duringthe following procedures.

5. Jack up the trolley to permit removal of the wheelassembly. Support the trolley using blocking.

6. Remove the capscrews and the lockwashers whichsecure the bearing capsules to the trolley frame.

7. Using suitable lifting equipment, support the wheelassembly, and pull or pry the bearing capsules outof engagement with the trolley frame. This willpermit the wheel assembly to be rolled free of itsmounting.

8. Remove the wheel assembly as a complete unit byrolling it from underneath the trolley frame as

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applicab

le. If necessary, jack the end truck or trolleyas necessary to permit removal.

9. Lower the wheel assembly to the floor and move itto a suitable work area prior to attempting anyrepairs.

Disassemb

ly

Disassemb

ly of this wheel assembly is limited to theremoval of the bearing capsules from the wheel andaxle assembly. This will permit replacement of thebearings. It does not have seals. The wheel and axleassembly is sold and serviced as one unit, and shouldnot be separated. Attempts to separate the axle andwheel assembly will result in the damage of wheel and/or the axle beyond further use.

Cleaning and Inspection

W

ear appropriate eye protection when working with

compressed air. Thoroughly wash each part of thewheel assembly in a suitable solvent. Dry each partusing low pressure, filtered, compressed air (15 psimaximum). Do not spin bearings while drying them, asthis will destroy the bearings.

Nicks and burrs on the shaft or the wheel may beremoved by polishing. Remove any nicks caused byhandling using a fine oil stone.

Inspect the bearings for freedom of rotation. If thebearings are excessively worn or do not rotate freely,replace them with new bearings.

Assemb

ly

Assemb

ly of the wheel assembly consists of installingthe bearings into the bearing capsules, assembling thecapsules to the appropriate sides of the wheelassembly, and installing the lube fittings (see Figure 1,Type BC Wheel Assemblies).

Installation

Use the f

ollowing procedure to install a drive or idlerwheel assembly:

1. Inspect the mating surfaces of the bearing capsulesas well as the trolley frame making sure that theyare free of burrs, dirt, etc.

2. Apply an antisieze compound to the matingsurfaces of the end truck or trolley, and to the matingsurfaces of the bearing capsules. This will preventrusting of the wheel mounting surfaces, thusmaking future wheel removal easier.

3. Lift the wheel assembly into position using asuitable hoist.

4. Roll the assembled wheel assembly into positionunderneath the trolley frame as applicable.

5. If necessary, jack the wheel assembly up intoposition underneath the trolley frame.

6. Slide the bearing capsules into engagement withthe end truck or trolley frame as applicable.

7. Install the lockwashers and the capscrews whichsecure the bearing capsules to the trolley frame.

8. Securely, but evenly tighten the capscrews.

9. If a drive wheel is being installed, install the drivegear case as described in the gear case installationinstructions outlined separately from this brochure.

10. Jack up the trolley off the blocking. Remove theblocking from underneath the trolley frame.

11. Lubricate the wheel assembly as described undethe lubrication topic.

12. Lower the trolley onto the rail.

13. Apply power to the crane and operators controlsTest the trolley operation. Check the wheel foproper alignment and rolling freedom.

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P&H

SPEC. NO.

AMBIENT

RANGE

MILITARY SPEC.

NO.

EQUIVALENT

LUBRICANTSMANUFACTURERS

472A

(NLGI #0 EP)

*Below - 10F

(-12C)

Not Available Conolith EP #0 Continental Oil Company

Lidok EP #9 Exxon Company

Amolith Grease] No. 0 EP Amoco Oil Company

Mobilux EP #0 Mobil Oil Company

Alvania EPRO Shell Oil Company

Prestige 740 EP Sun Company

Multifak EP #0 Texaco, Incorporated

Unoba EP NLGI #0 Union Oil Company of Calif.

Dura-Lith Grease EP #0 Chevron U.S.A., Inc.

Kendall L-406 Kendall Refining Co.

472B

(NLGI #1 EP)

*-20 to +40F

(-29 to 4C)

Not Available Litholine H EP 1 Arco Petroleum Products Company

Conolith EP #1 Continental Oil Company

Rolubricant 1or Lidok EP #1 Exxon Company (A)

Mobilux EP #1 Mobil Oil CorporationAlvania EP #1 Shell Oil Company


Multifak EP #1 Texaco, Incorporated

Amolith Grease #1 EP Amoco Oil Company


Dura-Lith Grease EP #1 Chevron U.S.A., Inc.

Gulf Crown Grease EP-1 Gulf Oil Company


Philube EP-1 Phillips Petroleum Co.

472

(NLGI #2 EP)

*+20 to 125F

(-6 to 52C)

Not Available Litholine H EP 2 Arco Petroleum Products Co.

Conolith EP #2 Continental Oil Company

Rolubricant 2 or Lidok #2 Exxon Company (A)

Mobilux EP #2 Mobil Oil Company

Alvania EP #2 Shell Oil Company


Multifax EP #2 Texaco, Incorporated

Amolith Grease #2 EP Amoco Oil Company


Dura-Lith Grease EP #2 Chevron Oil Company

Gulf Crown Grease EP-2 Gulf Oil Company


Philube EP-2 Phillips Petroleum Co.

*Pumpability tests also required when used in centralized lubrication systems. Consult manufacturer of system.

(A) Rolubricant for steel mill applications.

Revised 11/2/04

4

Type BC Capsule Wheel Assemblies

IIssue No. 9, 8-82 F115A

Table1. Lubrication Specification

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Figure 1.T

ype BC Wheel Assemb

lies

01.

BEARING CAPSULE

02.

BEARING CAPSULE

03.

CAPSCREW

04.

LOCKW

ASHER

05.

LUBE FITTING

06.

PLUG

07.

IDLER WHEEL ASSEMBL

Y

08.

DRIVER WHEEL ASSEMBL

Y

09.

BEARING

10.

BEARING SEAL

11.

SNAP RING

12.

KEY

01

03

04

04

03

01

09

05

06

10

07

10

05

06

11

12

02

03

04

04

03

01

05

06

10

08

10

05

06

DRIVER

IDLER

OCM 545

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yr

ight 1999, Morr

is Mater

ial Handling

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