Kubota EA330-E4 Series - Timing Gear and Camshaft

ENGINE
EA330-E4, WSM
1-S55
(4) Timing Gear and Camshaft
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 gear.
4. If the oil clearance is proper, replace the gear.
9Y1211018ENS0096US0
Side Clearance of Idle Gear
1. Pull the idle gear collar 2 (1) and push the idle gear (2) to each
end.
2. Measure the clearance "A" between the idle gear and idle gear
collar 2 with a feeler gauge.
3. If the clearance exceeds the allowable limit, replace the idle
gear collar 1 (3).
9Y1211018ENS0097US0
Side Clearance of Cam Gear
1. Pull the cam gear (2) with the camshaft (1) to its end.
2. Measure the clearance "A" between the cam gear (2) and
camshaft stopper (3).
3. If the clearance exceeds the allowable limit, replace the
camshaft stopper.
9Y1211018ENS0098US0
Backlash
Factory
specifica-
tion
Barancer
gear 1 ×
gear 2
0.0490 to 0.135 mm
0.00193 to 0.00531 in.
Other
gears
0.0430 to 0.130 mm
0.00170 to 0.00511 in.
Allowable
limit
All gears
0.3 mm
0.01 in.
Idle gear side clearance
Factory specification
0.20 to 0.51 mm
0.0079 to 0.020 in.
Allowable limit
0.9 mm
0.04 in.
Thickness of idle gear
collar 1
Factory specification
2.45 to 2.50 mm
0.0965 to 0.0984 in.
(1) Idle Gear Collar 2
(2) Idle Gear
(2) Idle Gear Collar 1
A: Clearance
Cam gear side clearance
Factory specification
0.0700 to 0.220 mm
0.00276 to 0.00866 in.
Allowable limit
0.3 mm
0.001 in.
Thickness of camshaft
stopper
Factory specification
3.780 to 3.855 mm
0.1489 to 0.1517 in.
(1) Camshaft
(2) Cam Gear
(2) Stopper
A: Clearance
KiSC issued 05, 2015 A