Adjusting backlash between the gear teeth of the
auxiliary engine drive.
Maximum horsepower drawn should never exceed
30 HP.
Between engine plane and application base fit a number of shims
to allow a 0.1 to 0.2 mm backlash may take place between the
gear teeth.
The pack of shims should be put together by alternating metallic
and isogene shims, the first and the last shims being of isogene
(the first metal shim on engine side shall be 0.5 mm).
After dismantling the timing case gears, provision shall be made
for a new timing keeping to the instructions given on page 84 prior
to reassembly.
Make sure the idler gear shoulder rings are not excessively worn;
also check the pin surface and the gear inside face for scoring.
Air compressor or hydraulic pump support located
between cylinder block and timing case.
The timing case is forged into an aluminium-based light alloy.
The use of no. 5.9030.634.0 tool is indispensable to obtain a
thorough concentricity of the sealing ring to the crankshaft as well
as the coplanarity of the auxiliary drive fixing surfaces.
On assembly true the case onto the idler gear pin after properly
interposing the seal between timing case and cylinder block; then
fit the screws without tightening fully.
Remove excess seal; use no. 5.9030.634.0 tool to obtain a
thorough screw tightening. Remove the tool.
If pumps are removed from support, it will be necessary to apply
some MOLYCOTE RB2 grease to lubricate the joint splines.
Should it be necessary to remove the support flange too, place
bushing A as shown in figure 10 to perform reassembly.
Fig. 6 - Engine oil thermostat.
Fig. 7 - Drive gear toothing backlash.
Fig. 8 - Aligning the timing case with the cylinder
block.
Fig. 9 - Timing case stripped components.
engine
timing case
11
1
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