Timing Gear Train, Front Cover & Camshaft C.
TIMING GEARS
1.
REMOVAL
a)
Timing Gear Cover To remove the timing gear cover, first remove the front support, axle and radiator assembly as follows : Drain cooling system, raise hood and disconnect headlight and horn wires at junction on front support, then unclip loom from radiator. Remove hood pivot bolts and remove hood. Do not lose the pivot bolt spacers. Disconnect radiator brace. Disconnect upper and lower hoses from radiator. Disconnect the drag link. If tractor is equipped with hydrostatic steering, disconnect the steering cylinder hoses, then cap and plug all openings to prevent dirt from entering system. Then, on all tractors, place wood blocks between steering gear housing and axle to prevent tipping. Using a suitable jack, support tractor under clutch housing. Unbolt stay rod bracket from clutch housing and steering gear housing from front of engine. Raise engine until crankshaft pulley will clear front axle support. Then roll out from axle support with front axle and tires.
b)
Remove the front cover.
c)
Remove the nut (1-2) then remove the injection pump gear (2-2).
d)
Remove the idler gear shaft bolt (3-2) then remove the idler gear (4-2) and shaft.
e)
Using a suitable puller remove the crankshaft pinion and key.
f)
Remove the camshaft gear (6-2).
2.
INSPECTION AND REPAIR
a)
Inspect the gears for wear and cracked or chipped teeth. Remove any burrs on the gears with a fine carborundum stone.
b)
Inspect the fan drive pulley for wear or cracking.
c)
Check the fit of the idler gear and shaft to specifications.
d)
Check the condition of the idler gear shaft bolt thread insert in the front of the crankcase. If inspection proves if necessary remove the thread insert and fit a new one.
Fig. 2 Image is Representative C-50
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
