Measuring Timing Gear Backlash; Removing Idler Gear - Mitsubishi L Series Service Manual

3.9 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
0.010 to 0.136 mm
[0.0004 to 0.0054 in.]
Between crank-
shaft gear and
0.040 to 0.118 mm
idler gear
[0.0016 to 0.0047 in.]
Between idler
0.010 to 0.136 mm
gear and valve
[0.0004 to 0.0054 in.]
camshaft gear
Between idler
0.037 to 0.117 mm
gear and pump
[0.0015 to 0.0046 in.]
camshaft gear
0.010 to 0.220 mm
[0.0004 to 0.0087 in.]
Between valve
camshaft gear
0.007 to 0.235 mm
and PTO gear
[0.0003 to 0.0091 in.]

3.10 Removing idler gear

(1) Remove the snap ring.
(2) Remove the idler gear.
Standard Limit
Spur
gear
Heli-
cal
gear
Spur
gear
0.300 mm
[0.0118
Heli-
in.]
cal
gear
Spur
gear
Heli-
cal
gear
DISASSEMBLY OF BASIC ENGINE
Measuring timing gear backlash
Snap ring
Removing idler gear
Idler gear
5-11