New Holland CX720 Repair Manual page 2567

PROCESS DRIVE Primary process drive - Torque (C.50.B -
D.20.A.10)
Thresher shaft rolling torque
Thresher shaft spur gear cap screws
Hydraulic pump drive housing
Hydraulic pump drive rolling torque
Engine flange cap screws
Input shaft rolling torque
Clutch housing cover cap screws
Main clutch cylinder cap screws
Unload clutch piston cap screws
Clutch housing spur gear cap screws
PROCESS DRIVE Primary process drive - Shimming (C.50.B -
D.20.A.30)
If a tapered roller bearing requires replacement, the outer race must also be replaced at the same time.
Some outer races are inserted on top of shim packs. These packs are installed to provide a preload to the bearings.
The original shim pack should be used when replacing the bearing and race. Perform the measurement to determine
if proper preload exists, and adjust the thickness of the shim pack appropriately.
All of the tapered roller bearings used in this gearbox are installed using an interference fit. Most bearings can be
removed and installed using bearing pullers and presses. The thresher shaft bearings are heat shrunk onto the shaft.
To install new bearings onto the shaft, heat them in a bearing oven, 80-85 °C (170-180 °F) for 30-45 minutes. Remove
the bearing from the oven and carefully slide it onto the shaft in the proper orientation. Ensure that the bearing slides
on evenly. When the bearing is in contact with the shaft, it will cool very quickly and start to shrink.
PROCESS DRIVE Primary process drive - Special tools (C.50.B -
D.20.A.40)
Modified chisel - The modified chisel shown should be used to disengage the lock nuts installed on various compo-
nents in the gearbox. An unmodified tool will not have the capability to pull the indentation from the shaft slot, and
will make removal more difficult. If a tool similar to the one shown is not available, carefully cut the lock nut free of
the shaft. Any damage to the shaft threads caused by this operation must be repaired prior to installation of the new
lock nut.
POWER TRAIN - PROCESS DRIVE Primary process drive
Item
1250 - 1500 Nmm (11-13 in. lbs.)
110-120 N·m (81-88 ft. lbs.)
190-210 N·m (140-155 ft. lbs.)
300 - 400 Nmm (2-3 in. lbs.)
80-90 N·m (59-66 ft. lbs.)
1400 - 1500 Nmm (12-14 in. lbs.)
45-50 N·m (33-37 ft. lbs.)
45-50 N·m (33-37 ft. lbs.)
1
10012217
2 4/7/2006
C.50.B / 3
Torque
35 N·m (26 ft. lbs.)
35 N·m (26 ft. lbs.)