Timing Gears - Kubota B1220 Workshop Manual

B1220, B1620, B1820, WSM

(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 shaft and the gear.
4. If the oil clearance is proper, replace the gear.
Factory specification
Backlash between idle
gear and crank gear
Allowable limit
Factory specification
Backlash between idle
gear and cam gear
Allowable limit
Factory specification
Backlash between idle
gear and injection pump
gear
Allowable limit
Factory specification
Injection pump gear to
governor gear
Allowable limit
Idle Gear Side Clearance
1. Set a dial indicator with its tip on the idle gear.
2. Measure the side clearance by moving the idle gear to the front
and rear.
3. If the measurement exceeds the allowable limit, replace the idle
gear collar.
Factory specification
Idle gear side clearance
Allowable limit
Camshaft Side Clearance
1. Set a dial indicator with its tip on the camshaft.
2. Measure the side clearance by moving the cam gear to the font
and rear.
3. If the measurement exceeds the allowable limit, replace the
camshaft stopper.
Factory specification
Camshaft side clearance
Allowable limit
1-S45
ENGINE
0.0430 to 0.124 mm
0.00170 to 0.00488 in.
0.15 mm
0.0059 in.
0.0470 to 0.123 mm
0.00185 to 0.00484 in.
0.15 mm
0.0059 in.
0.0460 to 0.124 mm
0.00182 to 0.00488 in.
0.15 mm
0.0059 in.
0.0410 to 0.123 mm
0.00162 to 0.00484 in.
0.15 mm
0.0059 in.
9Y1210272ENS0070US0
0.20 to 0.51 mm
0.0079 to 0.020 in.
0.80 mm
0.031 in.
9Y1210272ENS0071US0
0.15 to 0.31 mm
0.0059 to 0.012 in.
0.50 mm
0.020 in.
9Y1210272ENS0072US0
(EU)
KiSC issued 07, 2011 A