2022.10.7
© 2022 Eaton Cummins Automated Transmission Technologies. All rights reserved.
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TRSM0940 Appendix | Inspection Procedure
Inspection Procedure
Before reassembling the transmission, check each part
carefully for abnormal wear, excessive wear or damage to
determine if the part is suitable for reuse. When replace-
ment is necessary, use only genuine Eaton® Fuller® Trans-
mission parts to assure continued performance and
extended life from your unit.
Since the cost of a new part is generally a small fraction of
the total cost of downtime and labor, avoid reusing a ques-
tionable part. This could lead to additional repairs and
expense soon after assembly. Consideration should also be
given to the history of the unit, mileage, application, etc.,
when determining the reuse or replacement of any trans-
mission part.
Bearings
• Wash all bearings in clean solvent. Check balls,
rollers and raceways for pitting, discoloration and
spalled areas.
• Replace bearings that are pitted, discolored,
spalled or damaged during disassembly
• Lubricate bearings that are not pitted, discolored or
spalled and check for axial and radial clearances.
• Replace bearings with excessive clearances.
• Check bearing fit. Bearing inner races should be
tight to shaft; outer races slightly tight to slightly
loose in case bore. If the bearing spins freely in the
bore, the case should be replaced.
Bearing Covers
• Check covers for wear from thrust of adjacent bear-
ing. Replace covers damaged from thrust of bear-
ing outer race.
• Check cover bores for wear. Replace those worn or
oversized.
Clutch Release Parts
• Replace yokes worn at cam surfaces and bearing
carrier worn at contact pads.
• Check pedal shafts. Replace those worn at bushing
surfaces.
Gears
• Check gear teeth for frosting and pitting. Frosting
of gear teeth faces presents no threat of transmis-
sion failure. Often in continued operation of the
unit, frosted gears “heal” and do not progress to
the pitting stage. In most cases, gears with light to
moderate pitted teeth have considerable gear life
remaining and can be reused, but gears in the
advanced stage of pitting should be replaced.
• Check gears with clutching teeth abnormally worn,
tapered or reduced in length from clashing during
shifting. Replace gears found in any of these condi-
tions.
• Check axial clearance of gears.
Gear Shift Lever Housing Assembly
• Check spring tension on Shift Lever. Replace ten-
sion spring if lever moves too freely. If housing is
disassembled, check the Gear Shift Lever bottom
end and shift finger assembly for wear.
Gray Iron Parts
• Check all gray iron parts for cracks and breaks.
• Replace damaged parts.
Oil Return Threads and Seals
• Check oil return threads on the Input Shaft. If
return action of threads has been destroyed,
replace the Input Shaft.
• Check oil seal in Rear Bearing Cover. If sealing
action of lip has been destroyed, replace seal.
O-Rings
• Check all O-rings for cracks or distortion. Replace if
worn.
Reverse Idler Gear Assemblies
• Check for excessive wear from action of roller bear-
ings.
Shift Bar Housing Assembly
• Check for wear on shift yokes and block at pads
and lever slot. Replace excessively worn parts.
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