ENGINE MAIN PARTS - DISASSEMBLY
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2.7 Removing the timing gear case
Remove the timing gear case retaining bolts.
Then, remove the timing gear case.
The front plate is bolted in place separately
from the timing gear case. Do not attempt to
tap away the front plate together with the
timing gear case.
2.8 Measuring the timing gear backlash
Measure the backlash between the gears and use
the measurements as references upon
reassembly.
If any of the measured values exceeds the limit,
replace all gears unless otherwise specified.
Unit: mm (in.)
Standard value Limit
Crank gear - idler
gear
Idler gear - valve
camshaft gear
Idler gear - pump
camshaft gear
0.04 to 0.12
(0.0016 to 0.0047)
Valve camshaft
gear - PTO gear
0.08 to 0.19
(0.0031 to 0.0075)
Timing gear backlash
Pump camshaft
gear - oil pump
gear
0.07 to 0.20
(0.0028 to 0.0079)
0.30
(0.0118)
Removing the timing gear case
Front plate retaining bolts
Measuring the timing gear backlash
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