Land Rover Defender 90 110 Workshop Book 8 Bulletins Rover

r I 
I a LandRover 
Range Rover Workshop Bulletin 
. .. . . .. d:. ..::::,, , .,.. .i ,-., ....- .*..... .., .I,. ‘ATTENTION SERVICE MANAGER JUNE 1987 
BULLETIN NUMBER SLR 621 EN WBI 
LAND ROVER 
SU CARBURETTERS 
GEMMER POWER ASSISTED STEERING 
Further supplies of this  Bulletin can be obtained, free of  charge, from: 
Land Rover  Merchandising  Service 
P.O. Box 534, Erdington, Birmingham B24 00s 
SERVICE Land Rover  Service  Division  

loll CONTENTS - INTRODUCTION 
Section 
Number CONTENTS 
Page 
14 INTRODUCTION 
1191 FUEL SYSTEM 
- Carburetter - Overhaul 
- Carburetters - Tune and adjust 
3 
8 
I57 I STEERING 
- Cemmer power  assisted  steering  box - Overhaul 13 
INTROD UCTI ON 
This Bulletin  covers the Introduction of the twin SU H.I.F. 44 Carburetters  on the  Land Rovcr 90 and 110 V8 
Engine,  and the Gemmer Power assisted  steering  box prior to it being  included  in the updated 90-110 Workshop 
Manual,  which will be numbered...

FUEL SYSTEM 1191 
5 CARBURETTER OVERHAUL - S.U. HIF 44 - 
Right hand 
DISMANTLE 
1. Remove the carburetters  from the engine  and clean 
the exteriors  with a suitable  solvent. 
2.  Remove  the two  nuts  and spring  washcrs  and 
withdraw 
the air  intake  adaptor  and joint  washer. 
3.  Unscrew  and remove 
the piston  damper  assembly 
and  drain  the 
oil. 
4. Remove  the three  screws  and lift-off the suction 
chamber  complctc  with piston  and spring. 
5. Remove thc spring  clip from  the top...

1191 FUELSYSTEM 
42. 
43. 
44. 
45. 
46. Fit 
the starter 
assembly  to the carburetter  body and 
secure  with the 
two screws. 
Fit the  end seal  and cover. 
Fit  the  return spring. 
Fit  the  cam  lever  and tension  the  spring. 
Fit a new 
lock  washer  and  secure  with the nut  and 
bcnd the 
tabs  over a  convenient  flat. 
Adjust  the coils 
of the  spring, if necessary,  to 
prevent  coil binding. 
ST?974M 45 
KEY TO S.U. CARBURETTER COMPONENTS 
1. 
2. 
3. 
4. 
S. 
6. 
7. 
8. 
9. 
10. 
11....

FUEL SYSTEM 19 
5  

19 
56 
FUEL SYSTEM 
Fit throttle lever assembly 
47. Fit the  return  spring so that  the  longest  leg rests 
against the  throttle adjusting  screw housing. 
48. Fit the throttle  adjusting  lever and lost motion 
assembly  and tension  the return spring. 
49. Fit the throttle actuating  lever. 
50. Fit the bush washer  and lock  washer. 
51. Fit and  tighten  the special nut and  bend  the lock 
tabs  over 
a convenient  flat. 
I 
Fit jet  and  float  assembly 
52. Fit the jet bearing,  long end...

FUEL SYSTEM 
:-.sa 59. Assemble the jet to the  bi-metal  jet lever  and 
ensure  that the jet head  moves  freely in the 
cut
-out. 
60. Fit  the  jet and  bi-metal  jet lever to the  carburetter 
and  secure  with the spring  loaded  jet retaining 
screw. 
^L,. ,%’ 
61. Fit  the  mixture  adjusting  screw. 
L 
19 
. 
62. Adjust the mixture  screw until the jet is flush  with 
the  carburetter  bridge, then turn the screw  a 
further  three and one  half  turns  clockwise. 
63. Using a new sealing...

1191 FUELSYSTEM 
MODEL  CARBURETTER  S.U. SPEC EXHAUST CO EXHAUST  IDLE SPEED 
PART No. No. (NEW ENGINE) (After 3000 km) R.P.M. 
TUNE  AND ADJUST - SU HIF 44 CARBURETTERS 
Special  tools: 
Carburetter  balancer 
605330 or B89 
Non-dispersive infra-red exhaust gas analyser. 
FAST IDLE 
SPEED  R.P.M. 
A/IB I C D E 
ALL HICOMP V8 ENGINES 
General Requirements Prior  to Tuning Carburetters. 
Accurate  engine speed is essential  during carburetter 
tuning,  therefore  the distributor  pick up air 
gap and...

FUEL SYSTEM 
The following  instructions  apply  to  both carburetters 
unless  otherwise stated. 
Before  commencing  the following  instructions,  remove 
the  air cleaner,  air intake  elbows,  mixture  adjustment 
screw plug  and mixture  screw cap. 
19 
CARBURETTER  BALANCE 
Using  balancer 
605330 
1. Disconnect  the  interconnecting link betwccn the 
two  carburetters. 
Fit the balancer  to  the 
carburetter  intakes and ensure  that there  are 
no air 
leaks, 
if necessary,  zero the gauge with...

L 
19 FUEL SYSTEM 
7. Without  altering the position  of the  balancer 
control,  place the balancer  on the  second 
carburetter  intake  and adjust  the idle  screw  as 
necessary 
to achieve  the same  reading. 
8. Alternatively,  adjust and check  the balance  of both 
carburetters 
until an  idle  speed  of 700  to 
800 
rcv/min is.obtained. 
9. Reconnect  the  throttle  inter-connecting link, and 
again  check the  idle speed  and balance. 
Mixture setting 
10. Ensure  that  the cngine is still  at...