Kubota SM-E4B Series User Manual

ENGINE
SM-E4B SERIES, WSM
1-S56
Push Rod Alignment
1. Place the push rod on V blocks.
2. Measure the push rod alignment.
3. If the measurement exceeds the allowable limit, replace the
push rod.
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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.
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(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.
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Push rod alignment Allowable limit
0.25 mm
0.0098 in.
(1) Push Rod
Oil clearance between
tappet and tappet guide
bore
Factory specification
0.016 to 0.052 mm
0.00063 to 0.0020 in.
Allowable limit
0.10 mm
0.0039 in.
Tappet O.D. Factory specification
17.966 to 17.984 mm
0.70733 to 0.70803 in.
Tappet guide bore I.D. Factory specification
18.000 to 18.018 mm
0.70867 to 0.70937 in.
Backlash between idle
gear and crank gear
Factory specification
0.0430 to 0.124 mm
0.00170 to 0.00488 in.
Allowable limit
0.15 mm
0.0059 in.
Backlash between idle
gear and cam gear
Factory specification
0.0470 to 0.123 mm
0.00185 to 0.00484 in.
Allowable limit
0.15 mm
0.0059 in.
Backlash between idle
gear and injection pump
gear
Factory specification
0.0460 to 0.124 mm
0.00182 to 0.00488 in.
Allowable limit
0.15 mm
0.0059 in.
Backlash between oil
pump drive gear and
crank gear
Factory specification
0.0410 to 0.123 mm
0.00162 to 0.00484 in.
Allowable limit
0.15 mm
0.0059 in.
KiSC issued 01, 2013 A

Kubota SM-E4B Series Specifications

General

Brand	Kubota
Model	SM-E4B Series
Category	Engine
Language	English