Defender (1999-2002). Manual — part 8
07 - GENERAL FITTING REMINDERS
CONTENTS
Page
INFORMATION
GENERAL FITTING REMINDERS
1
. . . . . . . . . . . . . . . . . ...
PRECAUTIONS AGAINST DAMAGE
1
. . . . . . . . . . . . . . . . ..
SAFETY PRECAUTIONS
1
. . . . . . . . . . . . . . . . . . . . .
PREPARATION
2
. . . . . . . . . . . . . . . . . . . . . . . . .
DISMANTLING
2
. . . . . . . . . . . . . . . . . . . . . . . . . .
INSPECTION-GENERAL
2
. . . . . . . . . . . . . . . . . . . . . .
BALL AND ROLLER BEARINGS
3
. . . . . . . . . . . . . . . . . . .
OIL SEALS
4
. . . . . . . . . . . . . . . . . . . . . . . . . . ...
JOINTS AND JOINT FACES
5
. . . . . . . . . . . . . . . . . . . .
FLEXIBLE HYDRAULIC PIPES, HOSES
5
. . . . . . . . . . . . . . . .
FUEL SYSTEM HOSES
6
. . . . . . . . . . . . . . . . . . . . . ...
METRIC BOLT IDENTIFICATION
6
. . . . . . . . . . . . . . . . . .
METRIC NUT IDENTIFICATION
6
. . . . . . . . . . . . . . . . . . ..
KEYS AND KEYWAYS
6
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TAB WASHERS
6
. . . . . . . . . . . . . . . . . . . . . . . . ...
COTTER PINS
7
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NUTS
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
LOCKING WIRE
7
. . . . . . . . . . . . . . . . . . . . . . . . ...
SCREW THREADS
7
. . . . . . . . . . . . . . . . . . . . . . . ..
UNIFIED THREAD IDENTIFICATION
7
. . . . . . . . . . . . . . . . ..
GENERAL FITTING REMINDERS
1
INFORMATION
GENERAL FITTING REMINDERS
WORKSHOP SAFETY IS YOUR RESPONSIBILITY!
The suggestions, cautions and warnings in the
section are intended to serve as reminders for
trained and experienced mechanics. This manual
is not a definitive guide to automotive mechanics
or workshop safety.
Shop equipment, shop environment, and the use
and disposal of solvents, fluids, and chemicals
are subject to government regulations which are
intended to provide a level of safety. It is your
responsibility to know and comply with such
regulations.
PRECAUTIONS AGAINST DAMAGE
1. Always fit covers to protect fenders before
commencing work in engine compartment.
2. Cover seats and carpets, wear clean overalls
and wash hands or wear gloves before working
inside vehicle.
3. Avoid spilling hydraulic fluid or battery acid on
paint work. Wash off with water immediately if
this occurs. Use Polythene sheets to protect
carpets and seats.
4. Always use a recommended Service Tool where
specified.
5. Protect temporarily exposed screw threads by
replacing nuts or fitting plastic caps.
SAFETY PRECAUTIONS
1. Whenever possible, use a lift when working
beneath vehicle, in preference to jacking. Chock
wheels as well as applying parking brake.
WARNING: Do not use a pit when
removing fuel system components.
2. Never rely on a jack alone to support vehicle.
Use axle stands carefully placed at jacking
points to provide rigid support.
3. Ensure that a suitable form of fire extinguisher is
conveniently located.
4. Check that any lifting equipment used has
adequate capacity and is fully serviceable.
5. Disconnect battery.
WARNING: Do not disconnect any pipes in
air conditioning system, unless trained
and instructed to do so. A refrigerant is
used which can cause blindness if allowed to
contact eyes.
6. Ensure that adequate ventilation is provided
when volatile degreasing agents are being used.
7. Do not apply heat in an attempt to free stiff
fixings; as well as causing damage to protective
coatings, there is a risk of damage to electronic
equipment and brake linings from stray heat.
07
GENERAL FITTING REMINDERS
2
INFORMATION
PREPARATION
1. Clean components and surrounding area prior to
removal.
2. Blank off any openings exposed by component
removal using greaseproof paper and masking
tape.
3. Immediately seal fuel, oil or hydraulic lines when
separated, using plastic caps or plugs, to
prevent loss of fluid and entry of dirt.
4. Close open ends of oilways, exposed by
component removal, with tapered hardwood
plugs or readily visible plastic plugs.
5. Immediately a component is removed, place it in
a suitable container; use a separate container for
each component and its associated parts.
6. Before dismantling a component, clean it
thoroughly with a recommended cleaning agent;
check that agent is suitable for all materials of
component.
7. Clean bench and provide marking materials,
labels, containers and locking wire before
dismantling a component.
DISMANTLING
1. Observe scrupulous cleanliness when
dismantling components, particularly when
brake, fuel or hydraulic system parts are being
worked on. A particle of dirt or a cloth fragment
could cause a dangerous malfunction if trapped
in these systems.
2. Blow out all tapped holes, crevices, oilways and
fluid passages with an air line. Ensure that any
O-rings used for sealing are correctly replaced or
renewed, if disturbed.
3. Use marking ink to identify mating parts, to
ensure correct reassembly. If a centre punch or
scriber is used they may initiate cracks or
distortion of components.
4. Wire together mating parts where necessary to
prevent accidental interchange (e.g. roller
bearing components).
5. Wire labels on to all parts which are to be
renewed, and to parts requiring further
inspection before being passed for reassembly;
place these parts in separate containers from
those containing parts for rebuild.
6. Do not discard a part due for renewal until it has
been compared with the new part, to ensure that
its correct replacement has been obtained.
INSPECTION-GENERAL
1. Never inspect a component for wear or
dimensional check unless it is absolutely clean;
a slight smear of grease can conceal an incipient
failure.
2. When a component is to be checked
dimensionally against figures quoted for it, use
correct equipment (surface plates, micrometers,
dial gauges, etc.) in serviceable condition.
Makeshift checking equipment can be
dangerous.
3. Reject a component if its dimensions are outside
limits quoted, or if damage is apparent. A part
may, however, be refitted if its critical dimension
is exactly limit size, and is otherwise satisfactory.
4. Use ’Plastigauge’ 12 Type PG-1 for checking
bearing surface clearances. Directions for its
use, and a scale giving bearing clearances in
0,0025 mm steps are provided with it.
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GENERAL FITTING REMINDERS
3
INFORMATION
BALL AND ROLLER BEARINGS
CAUTION: Never refit a ball or roller
bearing without first ensuring that it is in a
fully serviceable condition.
1. Remove all traces of lubricant from bearing
under inspection by washing in a suitable
degreaser; maintain absolute cleanliness
throughout operations.
2. Inspect visually for markings of any form on
rolling elements, raceways, outer surface of
outer rings or inner surface of inner rings. Reject
any bearings found to be marked, since any
marking in these areas indicates onset of wear.
3. Holding inner race between finger and thumb of
one hand, spin outer race and check that it
revolves absolutely smoothly. Repeat, holding
outer race and spinning inner race.
4. Rotate outer ring gently with a reciprocating
motion, while holding inner ring; feel for any
check or obstruction to rotation, and reject
bearing if action is not perfectly smooth.
5. Lubricate bearing generously with lubricant
appropriate to installation.
6. Inspect shaft and bearing housing for
discolouration or other marking suggesting that
movement has taken place between bearing and
seatings. (This is particularly to be expected if
related markings were found in operation 2).
7. Ensure that shaft and housing are clean and free
from burrs before fitting bearing.
8. If one bearing assembly of a pair shows an
imperfection it is generally advisable to replace
both with new bearings; an exception could be
made if the faulty bearing had covered a low
mileage, and it could be established that
damage was confined to it only.
9. When fitting bearing to shaft, apply force only to
inner ring of bearing, and only to outer ring when
fitting into housing, as shown above.
10. In the case of grease lubricated bearings (e.g.
hub bearings) fill space between bearing and
outer seal with recommended grade of grease
before fitting seal.
11. Always mark components of separable bearings
(e.g. taper roller bearings) in dismantling, to
ensure correct reassembly. Never fit new rollers
in a used outer ring, always fit a complete new
bearing assembly.
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