C-50
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
Fig. 2
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.
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