wsm M7040 - Timing Gears

ENGINE
M6040, M7040, WSM
1-S67
(2) Timing Gears
Timing Gear Backlash
1. Set a dial indicator (lever type) with its tip on the gear tooth.
2. Move the gear to measure the backlash, holding its mating gear.
3. If the backlash exceeds the allowable limit, check the oil
clearance of the shafts and the gear.
4. If the oil clearance is proper, replace the gear.
9Y1210143ENS0101US0
Idle Gear Side Clearance
1. Set a dial indicator with its tip on the idle gear (1).
2. Measure the side clearance by moving the idle gear (1) to the
front and rear.
3. f the measurement exceeds the allowable limit, replace the idle
gear collars.
9Y1210143ENS0102US0
Oil Clearance between Idle Gear Shaft and Idle Gear Bushing
1. Measure the idle gear shaft O.D. with an outside micrometer.
2. Measure the idle gear bushings I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
bushing.
9Y1210143ENS0103US0
Backlash between crank
gear and cam gear
Factory specification
0.041 to 0.139 mm
0.0016 to 0.0055 in.
Allowable limit
0.22 mm
0.0087 in.
Backlash between cam
gear and balancer 1 gear
Factory specification
0.041 to 0.134 mm
0.0016 to 0.0053 in.
Allowable limit
0.22 mm
0.0087 in.
Backlash between idle
gear and injection pump
gear
Factory specification
0.041 to 0.134 mm
0.0016 to 0.0053 in.
Allowable limit
0.22 mm
0.0087 in.
Backlash between idle
gear and balancer 2 gear
Factory specification
0.041 to 0.129 mm
0.0016 to 0.0051 in.
Allowable limit
0.22 mm
0.0087 in.
(1) Balancer 1 Gear
(2) Cam Gear
(3) Idle Gear
(4) Injection Pump Gear
(5) Balancer 2 Gear
(6) Crank Gear
Side clearance of idle
gear
Factory specification
0.15 to 0.25 mm
0.0059 to 0.0098 in.
Allowable limit
0.9 mm
0.0354 in.
(1) Idle Gear (A) Side Clearance of Idle Gear
Oil clearance between
idle gear shaft and idle
gear bushing
Factory specification
0.050 to 0.091 mm
0.0020 to 0.0036 in.
Allowable limit
0.10 mm
0.0039 in.
Idle gear shaft O.D. Factory specification
34.959 to 34.975 mm
1.3763 to 1.3770 in.
Idle gear bushing I.D. Factory specification
35.025 to 35.050 mm
1.3789 to 1.3799 in.
KiSC issued 07, 2012 A