Timing Gears Servicing; Timing Gear Backlash - Nanni N4.40 Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
(2) Timing Gears

Timing Gear Backlash

1. Set a dial indicator (lever type) with its point on the gear tooth.
2. Hold the mating gear and move the gear to measure the
backlash.
3. If the backlash is more than the allowable limit, measure the oil
clearance in the journal part of each shaft.
4. If the oil clearance is correct, replace the gear.
Factory spec.
Backlash between idle
gear and crank gear
Allowable limit
Factory spec.
Backlash between idle
gear and cam gear
Allowable limit
Factory spec.
Backlash between idle
gear and injection pump
gear
Allowable limit
Factory spec.
Backlash between crank
gear and oil pump gear
Allowable limit
For balancer model only
Factory spec.
Backlash between idle
gear and balancer gear
(Intake side)
Allowable limit
Factory spec.
Backlash between cam
gear and balancer gear
(Exhaust side)
Allowable limit
For side PTO model only
Factory spec.
Backlash between crank
gear and idle gear 2
Allowable limit
Factory spec.
Backlash between idle
gear 2 and hydraulic
pump drive gear
Allowable limit
1-S82
ENGINE
0.04150 to 0.1122 mm
0.001634 to 0.004417 in.
0.15 mm
0.0059 in.
0.04150 to 0.1154 mm
0.001634 to 0.004543 in.
0.15 mm
0.0059 in.
0.04150 to 0.1154 mm
0.001634 to 0.004543 in.
0.15 mm
0.0059 in.
0.04150 to 0.1090 mm
0.001634 to 0.004291 in.
0.15 mm
0.0059 in.
0.03500 to 0.1160 mm
0.001378 to 0.004566 in.
0.15 mm
0.0059 in.
0.03500 to 0.1160 mm
0.001378 to 0.004566 in.
0.15 mm
0.0059 in.
0.04150 to 0.1154 mm
0.001634 to 0.004543 in.
0.15 mm
0.0059 in.
0.03080 to 0.1062 mm
0.001213 to 0.004181 in.
0.15 mm
0.0059 in.
M00000003ENS0119US1
KiSC issued 06, 2009 A