F70_F75_F77-CH-Charging_System-Part1
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Service manual
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CHARGING SYSTEM
1. COMPONENTS OF ALTERNATOR ....‘CH- 2, CHARGING SYSTEM CIRCUIT CH- 3. IN-VEHICLE INSPECTION CH- 4. REMOVAL OF ALTEFINATOR CH- 5. DISASSEMBLY OF ALTERNATOR CH- 6. INSPECTION OF ALTEHNATOR ........» CH-10 7. ASSEMBLY OF ALTERNATOR CH-13 B. DISASSEMBLY OF
VACUUM PUMP CH-15 9. INSPECTION OF VACUUM PUMP CH-16 10. ASSEMBLY OF VACUUM PUMP CH-16 11. INSTALLATION OF ALTEHNATOFI CH-17 12. INSPECTION OF REGULATOR CH-18
CH-T
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A cHAnG|NG SYSTEM
1. COMPONENTS OF ALTERNATOR
This alternator is a type in which a vacuum pump for generating negative pressure is directly connected.
(1) Alternator
(D Pulley Lock nut Pulley Fan G1) Collar Drive end frame © Felt washer Ci) Feltcover Bearing © Retainer plate washer (U3 Felt cover Spacer ring Snap ring Rotor
Holder Rectifier holder
Insulator
Frame brush cover ® Washer
r end frame
uum Dump pac denser
ator
king
Non-reusable parts
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CHARGING SYSTEM
ir Non-reusahie pans i
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CH 1
CHARGING svsTEM I 2. CHARGING
2. CHARGING SYSTEM CIRCUIT
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CHARGING SYSTEM
3. IN-VEHICLE INSPECTION * f
(1) Prior to the in-vehicle inspection, be sure to perform the
foilowing checks. G) Specific gravity of battery ® installation of battery terminals
(Z1) Fuse Q3) Wiring harness
© Abnormal noise emitted #rom alternator while engine
is rotating.
(2) Output test under unloaded siate Z
Ammeter (D Ensure that all switches are turned OFI_- so that no _ _[:|
unnecessary electric load may be applied. V Alwfnaivf
Radio I E
i
Raise the engine revolution speed gradually.
Measure the current and voltage. Specifications: Not to exceed 10 A
If the measured voltage is not withm the specifica~
tions. adjust the regulator or repface the régulator. as required.
(3) Output test under loaded state Ammeter
(D To apply electric load. perform the following opera
tion. a. Set the headlamps to the upper beam position. bf Set the heater biower to the “High” position. Measure the output current at the engiee speed of
1300 rpm. Specified Value: 20 A
If the amrneter reading is iess than the specified amperage, repair the alternator.
NOTE:
When the battery is fuliy charged, the measured current may be below the specified value. This is not a.n abnormal phenomenon. At this time, in- crease the electric load, for example, by turning ON the rear defogger. Then, check to see if the output current rises or not.
Volime-ter
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UHAHGING SYSTEM
(<1) Check of vacuum pump
Q) Air suction check of vacuum pump
Disconnect the air inlet hose ofthe vacuum pump. Start the engine. Hold your finger at the end of the inlet hose. If you can feel suction, it indicates that vacuum pump is functioning properly.
Discharge check of vacuum pump
engine. If oil and air are discharge, it éhoxizs that the vacuum pump is functioning properly.
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Bolh ull and air
ll
Bolh ull and air were dlscharged
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CHARGING SYSTEM
(1) Disconnect the ground cable terminal from the negative
(-) terminal of the battery (2) Remove the air cleaner and oil filter (3) Disconnect the (+) B wire and connector from the alter
(4) Remove the vacuum hose from the vacuum pump
(5) Disconnect the oil hose (6) Remove the alternator by removing the lock bolts
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CHARGING SYSTEM
5. DISASSEMBLY OF ALTERNATOR
(1) Remove the vacuum pump and 0-ri
p and U-nng by removing the three bolts.
I
WRE91-CPDH (3) Q) Disconnect the lead wire from the terminal B.
,A H
Remove the brush holdér Irve-moving the
(4) Remove the three through-bolts. f _ waggmws
WFIEEI1-CH) (5) Clamp the rotor in a vise_ Remove the lock nut, pulley.
fan and collar.
if
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CHARGING SYSTEM
(6) Press off the rotor by means of a press in coniunction W Y
with a suitabre steel pipe.
(7) Remove the rear end frame by removing the four nuts *
and two terminal insulators.
_ WHEG1 -.CHCF19 (8) Usmg a soldering iron, melt the solder while clamping I n'
Usmg a solclenng nron, men me smcaer wnne mampmg the stator coil by means of needle-nose pliers. ZILL x _ __ 3 NOTE: ax f-rm
