D439E Service Manual 3. Engine Electrical System (D439E)
128
Service Standards
Item Nominal value (Base diameter in [ ]) Limit
Corrective
action
Commutator OD 32 mm 31 mm Replace
Commutator run
out
- Above 0.5 mm
Correct or
replace
Brush length - 7.5 mm Replace
Brush spring
pressure
- 2.0~3.8 kgf Replace
Starter Motor
Pinion gap 3.0 mm -
Adjust with
packing
Output current (A)
At cold
cranking
At hot
cranking
Revolution
(rpm)
(27) Above 22 1500
(48) Above 38 2500
Alternator
(24V~50A)
Output
characteristics
(27V)
(55) Above 45 5000
- -
Tightening torque
Item Nm kgf.m Ib-ft
Alternator adjusting shaft mounting nut 18.6~27.4 1.9~2.8 13.8~20.4
Alternator adjusting plate mounting bolt 35.3~52.3 3.6~5.4 26.2~39.3
Alternator assembly mounting bolt 78.4~107.8 8.0~11 58.2~80
Starter motor mounting bolt (upper) 78.4~107.8 8.0~11 58.2~80
Starter motor mounting bolt (lower) 37.2~53.9 3.8~5.5 27.6~40
Vacuum pump mounting bolt 18.6~27.4 1.9~2.8 13.8~20.4
Vacuum pump pipe and oil cooler flange bolt 3.9~5.9 0.4~0.6 2.9~4.4
Pre-heater plug mounting nut 1~1.5 0.1~0.15 0.7~1.1
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