Taylor-Dunn AMB Ambulance, Operation, T Roubleshooting And Replacement Parts Manual

Page: 127 / 266

Maintenance, Service, and Repair
Transmission Page 17
10. Mark the position of each carrier bearing ring nut in relation to the
drive housing and cover and then remove the differential
assembly, do not allow the ring nuts to rotate.
11. Install the pinion gear. Re-shim if required.
12. Install the pinion gear holding tool (96-500-42) and tighten
the pinion nut enough to keep the pinion gear from
rotating.
13. Install the differential assembly.
14. Install the cover and all of the cover bolts. Torque to 45-50
ft-lbs.
If the ring and pinion gears or
bearings are replaced then the pinion
gear must be re-shimmed. Improper
pinion gear shims will result in drive
noise and premature failure. Refer to
Pinion Gear Shimming Instructions.
15. Check the gear lash between the ring and pinion gears.
The gear lash should be .005 to .007 inches.
16. Adjust the gear lash if needed by tightening or loosening
the carrier bearing race ring nuts. The two ring nuts must
be turned equally in opposite directions.
NOTE: To move the ring gear closer to the pinion:
Loosen the housing carrier bearing race ring
nuts and tighten the cover carrier bearing race
ring nut equally.
NOTE: To move the ring gear away from the pinion:
Loosen the cover carrier bearing race ring nut and tighten the
housing carrier race ring nut equally.
The two ring nuts must be turned the same amount in opposite
directions. This allows the carrier assembly to be positioned with the
proper gear lash without upsetting the bearing preload. If the ring
nuts are not turned the same amount, then the bearing preload will
no longer be correct and will result in drive noise and premature
failure.