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Page No: 28
Issue No: 1
Date: 031100
Issued By: PJA
6.8 Tappet Adjustment
Tappets must be adjusted to: Inlet
0.254mm (.010")
Exhaust
0.254mm
(.010")
Adjust the tappets when the engine is cold. Head torqued to 24 ft lb. when cold. Carry out
this adjustment after five hours of operation and again after ten hours of operation. At the
25 hour inspection this is done again.
CAUTION
Continued operation with incorrectly adjusted tappets will result in damage to valves,
valve seats, valve guides & overhead gear.
6.9 Tachometer and Sender
Many apparent engine problems can be caused through inaccurate tachometers. Where
engine performance is observed to be outside limits, the tachometer should be checked
against a calibrated instrument. Tachometer sender gap is 0.4mm (0.016").
6.10 Additional Checks
Check engine for ease of starting. Conduct idle test run.
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