Defender 90 NAS. Manual — part 12
MAINTENANCE
7
MAINTENANCE
CHECK/TOP-UP COOLING SYSTEM
To prevent corrosion of aluminium alloy engine parts it
is imperative that cooling system is filled with a
solution of water and phosphate free anti-freeze, at all
times. Never fill or Top-up with plain water.
WARNING: Do not remove filler cap when
engine is hot because cooling system is
pressurised and personal scalding could
result.
1. First turn filler cap slowly counter-clockwise to its
stop, pause and allow all pressure to escape.
Press down and continue to turn until cap is
removed.
2. When engine is cold, expansion tank should be
approximately half full with coolant
3. If necessary, Top-up cooling system with
premixed coolant. Use soft water whenever
possible, if local water supply is hard, rainwater
should be used.
4. When replacing filler cap it is important that it is
tightened down fully. Failure to tighten filler cap
properly may result in water loss, with possible
damage to engine
The cooling system should be drained and flushed at
2 year intervals or at onset of second winter. Refer to
Coolant Requirements.
See COOLING SYSTEM,
Adjustment, Coolant Requirements
CHECK/TOP-UP POWER STEERING FLUID
RESERVOIR
1. Clean area of fluid reservoir cap and remove
cap.
2. Check that fluid level is not below lower mark on
dipstick.
3. Top-up to high mark on dipstick using
transmission fluid.
See LUBRICANTS, FLUIDS
AND CAPACITIES, Information,
recommended lubricants and fluids
10
MAINTENANCE
8
MAINTENANCE
CHECK/ TOP-UP BRAKE FLUID RESERVOIR
CAUTION: Brake fluid can damage
paintwork. If spillage occurs, wash
affected area IMMEDIATELY with a large
quantity of water.
1. Clean area of filler cap and side of reservoir.
2. Check fluid level in reservoir by observing level
through translucent side. Level must be above
’MIN’ mark.
CAUTION: If level is below ’MIN’ mark,
check braking system for possibility of
fluid leakage.
3. Remove filler cap and top-up to ’MAX’ mark with
NEW brake fluid of the correct specification from
a sealed container.
See LUBRICANTS,
FLUIDS AND CAPACITIES, Information,
recommended lubricants and fluids
4. Refit filler cap.
CHECK/TOP-UP WASHER RESERVOIR
Top-up washer reservoir to within 25 mm, 1.0 in of
filler neck. Use a screen washer solvent/anti-freeze
solution to assist removing mud, flies and road film
and protect against freezing.
CHECK/ADJUST STEERING BOX
1. Check steering box for fluid leaks.
2. Check that there is no backlash in steering box
in straight ahead position. Adjust steering box if
necessary.
See STEERING, Adjustment,
Power Steering Box - adjust
MAINTENANCE
9
MAINTENANCE
UNDER VEHICLE MAINTENANCE
Vehicles operating under severe conditions of dust,
sand, mud or water should have oils changed and
lubrication carried out at more frequent intervals than
is recommended in maintenance schedules.
RENEW ENGINE OIL AND FILTER - V8i
1. Ensure vehicle is level. If necessary, run engine
to warm oil.
2. Disconnect battery. See Clean battery terminals.
3. Place drain tray under drain plug.
4. Remove engine oil dipstick.
5. Remove sump drain plug. Allow oil to drain
completely.
6. Fit NEW copper washer and refit drain plug.
43
Nm, 32 lbf ft.
7. Place drain tray under filter.
8. Unscrew oil filter counter-clockwise.
9. Clean filter adaptor face. Coat sealing ring on
NEW filter with clean engine oil. Screw filter on
until sealing ring contacts sealing face (finger
tight), then tighten a further half turn by hand
only. DO NOTovertighten.
10. Remove engine oil filler cap. Clean inside and
outside of cap.
11. Pour in correct quantity of NEW oil to ’FULL’
mark on dipstick.
See LUBRICANTS, FLUIDS
AND CAPACITIES, Information,
recommended lubricants and fluids
12. Reconnect battery, run engine and check for oil
leaks from oil filter.
13. Stop engine, allow oil to return to sump for a few
minutes, then recheck oil level and top-up if
necessary.
NOTE: Oil can symbol on dipstick must be
correct way up when viewed from LH side
of vehicle.
10
MAINTENANCE
10
MAINTENANCE
RENEW AUTOMATIC GEARBOX FLUID AND
FLUID SCREEN - ZF
1. Ensure vehicle is level. Place drain tray under
drain plug.
2. Remove gearbox dipstick, located at rear of RH
rocker cover, to aid oil drainage. Remove drain
plug from bottom of sump and allow fluid to drain
completely.
3. Refit plug using a NEW sealing washer. Tighten
to
10 Nm, 8 lbf ft.
4. Remove and replace fluid screen.
See
AUTOMATIC GEARBOX, Repair, Fluid Pan
Gasket and Screen
Refill and Check Fluid Level.
NOTE: The fluid level must checked when
fluid is COLD and engine idling in ’N’.
5. Refill or top-up with correct quantity and grade of
fluid.
See LUBRICANTS, FLUIDS AND
CAPACITIES, Information, recommended
lubricants and fluids
6. With ’P’ selected, start and run engine. Apply
footbrake, move selector slowly to position ’1’
then back to ’N’. Check fluid level, this must be
between the 2 level marks on dipstick.
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