Land Rover Defender 90 110 Workshop 1984 Rover Manual

ELECTRICAL EQUIPMENT - ALTERNATOR 
ST 1280M 
86 
10 
I 9 
1. Cover 
2. Regulator 
3. Rectifier 
4. Drive-end bracket 
5. End bearing kit 
6. Rotor assembly 
7. Slip ring  end bearing 
8. Slip rings 
6 7 
14 
KEY TO ALTERNATOR 
9. Slip  ring end bracket 
10. Stator 
11. Brush box 
12. Brushset 
13. Fixing bolt -slip ring  end bracket  to drive-end bracket 
14.  Suppression capacitor 
15. Surge  protection  diode 
21  

I86 I ELECTRICAL EQUIPMENT - ALTERNATOR 
19 
/ 
11ov - 
I 12 I 
ST1283M 
20. Check for satisfactory  field winding  insulation  by 
connecting  a 110 
V A.C.  15-watt test lamp betwcen 
either of the slip  rings  and the rotor  body.  The 
lamp  should  not light. 
ST1284M 
Stator winding 
21. Due  to the  very  low resistance  of the  stator 
windings,  a practical  test 
to determine  the presence 
of  short
-circuited  turns cannot  be carried  out 
without  the 
usc of special  instruments.  However,...

ELECTRICAL EQUIPMENT- ALTERNATOR 
ST1286M 
TIGHTENING TORQUES 
Through bolts ..................................................... 
Rectifier fixing bolts ............................................. 
SRE Cover ...................................................... 
Brush  Box ....................................................... 
Surge Diode .................................................... 
Brush  and Regulator  fixing ................................. 
D/E Bearing Plate...

86 
ALTERNATOR OVERHAUL - Lucas A12745 
ELECTRICAL EQUIPMENT- ALTERNATOR 
Description 
The model A127 alternator is a three  phase,  field 
sensed  unit, the rotor  and stator  windings  generate 
three  phase  alternating  current (AC) which  is rectified 
to  direct  current 
(DC). The electronic  voltage regulator 
unit  controls  the alternator  output voltage  by high 
frequency  switching 
of the rotor  field circuit. 
It 
is essential  that good  electrical  connections  are 
maintained  at all...

ELECTRICAL EQUTPMENT- ALTERNATOR 186 
ill* . . -2G ALTERNATOR - LUCAS A 127-65 .- . 
.. .. .. 
Service parts 
1. Suppression capacitors - 2 off 
2. Regula t or/Brus h box assembly 
3. Through bolts 
4.  Slip ring  end 
(SRE) bracket 
5. Stator 
6. Rectifier 
7. Drive end bracket (DRE)/bearing assembly 
8. noior 
9. Slip ring  end bearing 
25  

186 I ELECTRICAL EQUIPMENT - ALTERNATOR 
6. Check brush  spring  pressure using a push  type 
spring 
guage. Gauge  should  register 136 to 279 g (5 
to 10 02) when brush  is pressed  until face is flush 
with  housing. 
If reading is outside  these  limits, 
renew  assembly. 
7. Mark the  relative positions  of the end  brackets  and 
stator.  Remove  through bolts and withdraw  slip 
ring  end bracket and  stator assembly. Carefully  tap 
the mounting  lugs with a mallet 
if necessary. 
8. Remove...

ELECTRICAL EQUIPMENT- ALTERNATOR 
f:::,;;:: :!, ...... ,+;sir. :.: .. Assembling ...... e,.. 
19. Fit the  spacer  and press  the rotor  into the drive  end 
bracket. 
Tnsert the  through  bolts. Fit the spacer, 
fan,  pulley  and spring  washer 
to the shaft. Fit and 
tighten  the pulley  nut 
to the correct  torque. 
20.  Fit the  stator  and rectifier  assembly  to the  drive 
end  bracket 
in the position  previously  marked. 
21. Fit the  slip  ring  end bracket in the position 
previously  marked,...

ELECTRICAL EQUIPMENT- ALTERNATOR 
I 
ALTERNATOR FUNCTIONAL  CHECK 
The alternator  contains  polarity  sensitive components 
that  could  be permanently  damaged 
if subjected to 
incorrect  polarity. 
Do 
not connect  or disconnect  any part of the charging 
circuit 
- including the battery  leads - while the 
engine  is running.  Run  the alternator  with all 
connections  made 
or with the unit  disconnected. 
This  operation  must  be performed 
in two parts. Thc 
first to prove  the  alternators...

Warning Light 
Illuminated at stand-still. 
extinguished at cut-in bpeed (I ,5on revhnin) but at higher  speeds 
becomes partially illuminated again 
and gets progressively brighter 
Not illuminated 
hetwceti zero at 1 ,500 rev/nun 
Teniperature 
High 
High 
ALTERNATOR 
DOES NOT  CHARGE 
WEAK  OR 
IRRF,GULAR CHARGE 
OVER  CHARGE  WORN 
OR SLACK  BELT 
WORN  OR DIRTY  BRUSHES 
BROKEN  OR FAULTY  ROTOR WINDING 
BREAK  IN CHARGING  CIRCUIT 
OPEN CIRCUIT OK FAULTY FIELD DIODE 
FAULTY  REGIJLATOR 
2 OR 3...

L 
86 
DIESEL ENGINE STARTER MOTOR (2M113) 
DISMANTLE TEST AND OVERHAUL 
Solenoid 
Unit 
ELECTRICAL EQUIPMENT - DIESEL ENGINE STARTER MOTOR 
1. Disconnect  link from  starter  terminal. 
2. Unscrew  and remove  solenoid  securing screws and 
withdraw  the solenoid  body. 
3. Remove  plunger complete  with seal and nylon 
block  (if fitted)  by lifting  front end 
of plunger  to 
release 
it from  the top of the  engagement  lever. 
Commutator  end bracket 
4. Remove  the two  brush  plate securing...