Idler Gear - Install; Idler Gear End Play - Measure; Timing Gear Backlash - Measure - Mitsubishi S6R Series Service Manual

4.7 Idler Gear - Install

(1) Turn the crankshaft to move the No. 1 cylinder to the
top dead center.
(2) Apply engine oil to the idler shaft.
(3) Install the idler gear, aligning it with the match marks.
(4) Install the thrust plate to the idler shaft.
(5) Tighten the bolts to the specified torque.
(6) Make sure that the match marks on timing gears are
properly aligned as shown in the illustration.

4.8 Idler Gear End Play - Measure

Measure the end play of the idler gear. If the value exceeds
the limit, find the causal parts, and replace them with new
ones.
Item
Idler gear end play

4.9 Timing Gear Backlash - Measure

Measure the backlash of timing gears using either method:
measure the gear backlash with a dial gauge applying its
probe to a tooth flank on the pitch circle at a right angle to
the tooth axis, or measure the clearance between gears by
inserting thickness gauges between the engaging gear teeth.
If the value exceeds the limit, replace the gears with new
ones.
Item
Backlash between crank gear
and idler gear
Backlash between idler gear
and camshaft gear
Backlash between idler gear
and fuel injection pump gear
Standard value Limit value
0.2 to 0.4 mm 0.6 mm
[0.008 to 0.016 in.] [0.024 in.]
Standard value Limit value
0.11 to 0.28 mm 0.50 mm
[0.0043 to 0.0110 in.] [0.0197 in.]
0.12 to 0.18 mm 0.50 mm
[0.0047 to 0.0071 in.] [0.0197 in.]
0.12 to 0.18 mm 0.50 mm
[0.0047 to 0.0071 in.] [0.0197 in.]
Chapter 7 ASSEMBLY OF BASIC ENGINE
3
2
Fuel injection pump gear
Timing Gear Train
60 ± 3.0 N·m {6.1 ± 0.31 kgf·m} [44.3 ± 2.21 lbf·ft]
Idler Gear - Install
Idler Gear End Play - Measure
Timing Gear Backlash - Measure
Camshaft gear
Idler gear
Crankshaft gear
Idler gear
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