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MEL141LA
MEL142L
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CHARGING SYSTEM
Construction (Cont’d)
SC-31
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MEL143LA
MEL144L
CHARGING SYSTEM
Construction (Cont’d)
SC-32
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MEL497L
MEL145L
Removal and InstallationNJSC0013REMOVAL (QG ENGINE MODELS)NJSC0013S011. Loosen drive belt idler pulley.
2. Remove drive belt idler pulley (include tightening screw).
3. Remove alternator harness.
4. Remove alternator upper bolt and lower bolt.
5. Remove alternator.
MEL948N
REMOVAL (YD ENGINE MODELS)NJSC0013S031. Remove alternator harness.
2. Loosen alternator upper nut and lower bolt.
3. Loosen drive belt.
4. Remove alternator bracket bolts (two).
5. Remove alternator upper nut and lower bolt.
6. Remove alternator.
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CHARGING SYSTEM
Construction (Cont’d)
SC-33
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INSTALLATIONNJSC0013S02To install, reverse the removal procedure.
SEL032Z
DisassemblyNJSC0021REAR COVERNJSC0021S01CAUTION:
Rear cover may be hard to remove because a ring is used to
lock outer race of rear bearing. To facilitate removal of rear
cover, heat just bearing box section with a 200W soldering
iron.
Do not use a heat gun, as it can damage diode assembly.
REAR BEARINGNJSC0021S02CAUTION:
Do not reuse rear bearing after removal. Replace with a
new one.
Do not lubricate rear bearing outer race.
SEL033Z
InspectionNJSC0022ROTOR CHECKNJSC0022S011. Resistance test
Resistance: Refer to SDS (SC-38).
Not within the specified values ... Replace rotor.
2. Insulator test
Continuity exists ... Replace rotor.
3. Check slip ring for wear.
Slip ring minimum outer diameter:
Refer to SDS (SC-38).
Not within the specified values ... Replace rotor.
CHARGING SYSTEM
Removal and Installation (Cont’d)
SC-34
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SEL034Z
BRUSH CHECKNJSC0022S021. Check smooth movement of brush.
Not smooth ... Check brush holder and clean.
2. Check brush for wear.
Replace brush if it is worn down to the limit line.
SEL037Z
STATOR CHECKNJSC0022S031. Continuity test
No continuity ... Replace stator.
2. Ground test
Continuity exists ... Replace stator.
SEL044Z
AssemblyNJSC0023RING FITTING IN REAR BEARINGNJSC0023S01Fix ring into groove in rear bearing so that it is as close to the
adjacent area as possible.
CAUTION:
Do not reuse rear bearing after removal.
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CHARGING SYSTEM
Inspection (Cont’d)
SC-35
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SEL048Z
SEL049Z
REAR COVER INSTALLATIONNJSC0023S021. Fit brush assembly, diode assembly, regulator assembly and
stator.
2. Push brushes up with fingers and install them to rotor.
Take care not to damage slip ring sliding surface.
CHARGING SYSTEM
Assembly (Cont’d)
SC-36
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BatteryNJSC0014
Applied
modelQG engine YD engine
Type 34B19L 46B24L 55D23L 65D26LYUASA type code YUASA type code
110D26L
025 027 063 065 075 096L 010S 067 096
Capac-
ity V-AH12-27 12-36 12-48 12-52 12-47 12-55 12-50 12-65 12-60 12-64 12-70
StarterNJSC0015
Ty p eD7E31 S114-570B S114-800B M2T48681 M0T83581A M8T71371
VALEO make HITACHI make MITSUBISHI make
Non-reduction Non-reduction Reduction Non-reduction Reduction Reduction
Applied model QG engine YD engine
System voltage V12
No-loadTerminal voltage V 11.0 11.5 11.0 11.5 11.0 11.0
Current A 45 Less than 60 Less than 90 Less than 53 Less than 90 Less than 145
Revolution rpm 12,000More than
6,000More than
2,750More than
6,000More than
2,750More than
3,400
Minimum diameter of commutator mm
(in)28.2 (1.110) 28.0 (1.102) 31.4 (1.236) 28.8 (1.134) 31.4 (1.236)
Minimum length of brush mm (in) 6.15 (0.242) 9.0 (0.354) 10.5 (0.413) 11.5 (0.453) 7.0 (0.276) 11.0 (0.433)
Brush spring tension N (kg, lb)16.2 - 19.8
(1.65 - 2.02,
3.46 - 4.45)9.8 - 13.7
(1.0 - 1.4,
2.2 - 3.1)12.7 - 17.7
(1.3 - 1.8,
2.9 - 4.0)13.7 - 25.5
(1.4 - 2.6,
3.1 - 5.7)15.0 - 20.4
(1.5 - 2.1,
3.4 - 4.6)26.5 - 36.3
(2.7 - 3.7,
6.0 - 8.2)
Clearance between bearing metal and
armature shaft mm (in)0.05 (0.0020) Less than 0.2 (0.008) —
Clearance “” between pinion front
edge and pinion stopper mm (in)Max. 1 (0.039) 0.3 - 2.5 (0.012 - 0.098)0.5 - 2.0
(0.020 - 0.079)—
Movement “” in height of pinion
assembly mm (in)Max. 12.2
(0.480)—0.5 - 2.0
(0.020 - 0.079)
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SERVICE DATA AND SPECIFICATIONS (SDS)
Battery
SC-37
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AlternatorNJSC0016
Ty p eLR180-762 LR180-757 LR1100-724 A2TB3191 A3TB0771
HITACHI make MITSUBISHI make
Applied model QG engine YD engine QG engine YD engine
Nominal rating V-A 12-80 12-80 12-100 12-80 12-90
Ground polarityNegative
Minimum revolutions under no-load
(When 13.5V is applied) rpmLess than 1,000 Less than 1,100 Less than 1,000 Less than 1,300
Hot output current (When 13.5V is
applied) A/rpmMore than
23/1,300
More than
65/2,500
More than
77/5,000More than
17/1,300
More than
63/2,500
More than
76/5,000More than
34/1,300
Morethan
80/2,500
More than
91/5,000More than
23/1,300
More than
62/2,500
More than
72/5,000More than
29/1,300
More than
76/2,500
More than
88/5,000
Regulated output voltage V 14.1 - 14.7
Minimum length of brush mm (in) More than 6.0 (0.236) More than 5.0 (0.197)
Brush spring pressure N (g, oz) 1.0 - 3.43 (102 - 350, 3.60 - 12.34) 4.8 - 6.0 (490 - 610, 17.28 - 21.51)
Slip ring minimum diameter mm (in) More than 26.0 (1.024) More than 22.1 (0.870)
Rotor coil resistance at 20° (68°F)Ω2.67 2.31 2.2 - 2.6 2.1 - 2.5
SERVICE DATA AND SPECIFICATIONS (SDS)
Alternator
SC-38