Camshaft And Timing Gear - Kubota Z400-B Handbuch

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[3] CAMSHAFT AND TIMING GEAR
Replacing Rocker Arm Bushing
(When removing)
1. Press out the rocker arm bushing using a rocker arm
bushing replacing tool.
(When installing)
1. Clean the rocker arm bush ing and the bore, and apply
engine oil to them.
2. Press in the bushing so that its end comes flush with the
rocker arm, using a rocker arm bushing replacing tool.
• IMPORTANT:
• Be sure to align the oil holes on the rocker arm and the
bushing, and check that the seam of the bushing positions
is as in figure.
Gear Backlash
1. Set a dial indicator (lever type) with its indicator 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.
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Oil pum gear to
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crank gear
Factory
spec iflcation
0.041 to 0.123 mm
0.00161 to 0.00484 in.
Idler gear to crank Factory 0.043 to 0.124 mm
gear specification 0.00169 to 0.00488 in.
Idler gear to cam
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Factory 0.047 to 0.123 mm
gear specification 0.00185 to 0.00484 In.
Factory 0.046 to 0.124 mm
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Idler gear to
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injection pump gear
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Oil clearance
specification
Allowable
limit
0.00181 to 0.00488 in.
0.15 mm
0.0059 in.
Idle Gear Side Clearance
1. Pull the idle gear collar 2 and push the idle gear, and
measure the clearance between the idle gear and the idle
gear collar with a feeler gauge.
2. If the clearance exceeds the allowable limit, replace the
idle gear collar 1.
0.20 to 0.51 mm
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Factory specification
0.0079 to 0.0201 in.
Side clearance
0.6mm
Allowable lim ..
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0.024 in.
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S-93