Timing Gears, Camshaft And Fuel Camshaft - Kubota D1503-M-DI Workshop Manual

03-M-DI Series, WSM

(2) Timing Gears, Camshaft and Fuel Camshaft

Oil Clearance between Tappet and Tappet Guide Bore
1. Measure the tappet O.D. with an outside micrometer.
2. Measure the I.D. of the tappet guide bore with a cylinder gauge,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit or the tappet is
damaged, replace the tappet.
Factory spec.
Oil Clearance between
tappet and tappet guide
bore
Allowable limit
Tappet O.D. Factory spec.
Tappet guide bore I.D. Factory spec.
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.
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
(IN. side)
Allowable limit
Factory spec.
Backlash between cam
gear and balancer gear
(EX. side)
Allowable limit
S-66
DIESEL ENGINE
0.020 to 0.062 mm
0.00079 to 0.00244 in.
0.07 mm
0.0028 in.
23.959 to 23.980 mm
0.94327 to 0.94410 in.
24.000 to 24.021 mm
0.94488 to 0.94571 in.
W1029366
0.0415 to 0.1122 mm
0.00163 to 0.00442 in.
0.15 mm
0.0059 in.
0.0415 to 0.1154 mm
0.00163 to 0.00454 in.
0.15 mm
0.0059 in.
0.0415 to 0.1154 mm
0.00163 to 0.00454 in.
0.15 mm
0.0059 in.
0.0415 to 0.1090 mm
0.00163 to 0.00429 in.
0.15 mm
0.0059 in.
0.0350 to 0.1160 mm
0.00138 to 0.00457 in.
0.15 mm
0.0059 in.
0.0350 to 0.1160 mm
0.00138 to 0.00457 in.
0.15 mm
0.0059 in.
W1029564
KiSC issued 10, 2009 A