Lexus ES300 (1997 year). Service manual — part 295

P10827

Turn

SST (A)

SST (C)

P10836

Turn

SST (A)

SST (B)

S05073

P01762

SST

CH–8

–

CHARGING

GENERATOR

1012

1997 LEXUS ES300 (RM511U)

(e)

To loosen the pulley nut, turn SST (A) in the direction
shown in the illustration.

NOTICE:
To prevent damage to the rotor shaft, do not loosen the
pulley nut more than one–half of a turn.
(f)

Remove the generator from SST (C).

(g)

Turn SST (B), and remove SST (A and B).

(h)

Remove the pulley nut and pulley.

5.

REMOVE RECTIFIER END FRAME

(a)

Remove the 4 nuts and cord clip.

(b)

Using SST, remove the rectifier end frame.
SST

09286–46011

(c)

Remove the generator washer.

6.

REMOVE ROTOR FROM DRIVE END FRAME

CH018–01

B00894

Ohmmeter

Continuity

B00895

Ohmmeter

No Continuity

B00896

P00484

Ohmmeter

Continuity

P00482

Ohmmeter

No Continuity

–

CHARGING

GENERATOR

CH–9

1013

1997 LEXUS ES300 (RM511U)

INSPECTION

1.

INSPECT ROTOR FOR OPEN CIRCUIT

Using an ohmmeter, check that there is continuity between the
slip rings.

Standard resistance: 2.1 – 2.5

Ω

at 20

°

C (68

°

F)

If there is no continuity, replace the rotor.

2.

INSPECT ROTOR FOR GROUND

Using an ohmmeter, check that there is no continuity between
the slip ring and rotor.
If there is continuity, replace the rotor.

3.

INSPECT SLIP RINGS

(a)

Check that the slip rings are not rough or scored.

If rough or scored, replace the rotor.
(b)

Using a vernier caliper, measure the slip ring diameter.
Standard diameter: 14.2 – 14.4 mm (0.559–0.567 in.)
Minimum diameter: 12.8 mm (0.504 in.)

If the diameter is less than minimum, replace the rotor.

4.

INSPECT STATOR FOR OPEN CIRCUIT

Using an ohmmeter, check that there is continuity between the
coil leads.
If there is no continuity, replace the drive end frame assembly.

5.

INSPECT STATOR FOR GROUND

Using an ohmmeter, check that there is no continuity between
the coil lead and drive end frame.
If there is continuity, replace the drive end frame assembly.

P13535

Length

P00480

Ohmmeter Positive (+)

Terminal

Rectifier
Terminal

P00481

Ohmmeter

Negative (–)
Terminal

P00644

P14225

CH–10

–

CHARGING

GENERATOR

1014

1997 LEXUS ES300 (RM511U)

6.

INSPECT EXPOSED BRUSH LENGTH

Using a vernier caliper, measure the exposed brush length.

Standard exposed length: 10.5 mm (0.413 in.)
Minimum exposed length: 1.5 mm (0.059 in.)

If the exposed length is less than minimum, replace the brushes
and brush holder assembly.

7.

INSPECT POSITIVE RECTIFIER

(a)

Using an ohmmeter, connect one tester probe to the posi-
tive (+) terminal and the other to each rectifier terminal.

(b)

Reverse the polarity of the tester probes and repeat step
(a).

(c)

Check that one shows continuity and the other shows no
continuity.

If continuity is not as specified, replace the rectifier holder.

8.

INSPECT NEGATIVE RECTIFIER

(a)

Using an ohmmeter, connect one tester probe to each
negative (–) terminal and the other to each rectifier termi-
nal.

(b)

Reverse the polarity of the tester probes and repeat step
(a).

(c)

Check that one shows continuity and the other shows no
continuity.

If continuity is not as specified, replace the rectifier holder.

9.

INSPECT FRONT BEARING

Check that the bearing is not rough or worn.

10.

IF NECESSARY, REPLACE FRONT BEARING

(a)

Remove the 4 screws, bearing retainer and bearing.

P00628

Socket Wrench

P00479

SST

CH1026

N00581

SST

P13567

–

CHARGING

GENERATOR

CH–11

1015

1997 LEXUS ES300 (RM511U)

(b)

Using a socket wrench and press, press out the bearing.

(c)

Using SST and a press, press in a new bearing.
SST

09950–60010 (09951–00500)

(d)

Install the bearing retainer with the 4 screws.
Torque: 3.0 N·m (31 kgf·cm, 27 in.·lbf)

11.

INSPECT REAR BEARING

Check that the bearing is not rough or worn.

12.

IF NECESSARY, REPLACE REAR BEARING

(a)

Using SST, remove the bearing cover (outside) and bear-
ing.
SST

09820–00021

NOTICE:
Be careful not to damage the fan.
(b)

Remove the bearing cover (inside).

(c)

Place the bearing cover (inside) on the rotor.