Mitsubishi L3C Service Manual

INSPECTION AND REPAIR OF BASIC ENGINE
6-8
3. Inspecting and repairing gear case, timing gear and camshaft
3.1 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.
Measuring timing gear backlash
3.2 Measuring clearance between idler gear
and idler shaft
Measure the inside diameter of the idler gear and outside
diameter of the idler shaft. Replace the idler gear or idler
shaft if the clearance exceeds the limit.
Measuring idler gear inside diameter and idler shaft
outside diameter
3.3 Replacing idler shaft
Press-fit the idler shaft into the cylinder block to the
dimension in the illustration.
Replacing idler shaft
Item Standard Limit
Timing gear backlash
Between crank-
shaft gear and
idler gear
0.010 to 0.136 mm
[0.0004 to 0.0054 in.]
Spur
gear
0.300 mm
[0.0118
in.]
0.040 to 0.118 mm
[0.0016 to 0.0047 in.]
Heli-
cal
gear
Between idler
gear and valve
camshaft gear
0.010 to 0.136 mm
[0.0004 to 0.0054 in.]
Spur
gear
Between idler
gear and pump
camshaft gear
0.037 to 0.117 mm
[0.0015 to 0.0046 in.]
Heli-
cal
gear
Between valve
camshaft gear
and PTO gear
0.010 to 0.220 mm
[0.0004 to 0.0087 in.]
Spur
gear
0.007 to 0.235 mm
[0.0003 to 0.0091 in.]
Heli-
cal
gear
Item Standard Limit
Clearance between idler
gear and idler shaft
0.030 to 0.066 mm
[0.0012 to 0.0026 in.]
0.200 mm
[0.0079 in.]
Measuring directions
Measuring
points
23.3
+0.3
0
mm [0.917
+0.12
0
in.]

Mitsubishi L3C Specifications

General

Brand	Mitsubishi
Model	L3C
Category	Engine
Language	English