Measuring Timing Gear Backlash; Removing Idler Gear; Removing Camshaft - Mitsubishi Heavy Industries SL Series Service Manual

DISASSEMBLY OF BASIC ENGINE

3.4 Measuring timing gear backlash

Measure the backlash of the timing gears by using one of
the following two methods; measure the gear play with the
dial gauge plunger applied to a tooth flank on the pitch
circle at a right angle to the tooth axis, or measure the
clearance between gears by inserting a feeler gauge between
the gears at the tooth-to-tooth contacting area. Replace the
faulty gear pair if the limit is exceeded.
Item
Between crankshaft
gear and idler gear
Between idler gear
and valve camshaft
gear
Between idler gear
Timing
and pump camshaft
gear
gear
backlash
Between valve
camshaft gear and
PTO gear
Between pump
camshaft gear and
oil pump gear

3.5 Removing idler gear

Remove the idler gear while turning the gear.

3.6 Removing camshaft

Be careful not to damage the camshaft cam, the cam-
shaft journal, and the cam hole of the cylinder block.
(1) Rotate the camshaft to see the thrust plate bolt through
the camshaft gear hole.
(2) By using the socket, remove the thrust plate bolt.
(3) Remove the camshaft from the cylinder block
5-10
Standard Limit
0.04 to 0.12 mm
[0.0016 to 0.0047 in.]
0.30 mm
[0.0118 in.]
0.08 to 0.19 mm
[0.0031 to 0.0075 in.]
0.07 to 0.20 mm
[0.0028 to 0.0079 in.]
Measuring backlash timing gear
Removing idler gear
Removing camshaft