1999 LAND ROVER DEFENDER wheel

WIPERS AND WASHERS
3
DESCRIPTION AND OPERATION Although windscreen wiper functionality remains the same, the mechanical architecture has undergone significant
changes. The body structure has undergone some minor changes to house the revised wiper linkage.
A modified wiper motor is introduced which is balanced to reduce operation noise. The brush plate is fitted with
capacitors to reduce radio interference and a thermal cut-out is introduced to prevent motor burnout. The motor
also contains a new park switch which also reduces operation noise. A common motor is now used on both LHD
and RHD variants.
The motor is repositioned on the bulkhead which allows a straighter drive cable run. The straighter run reduces
load on the cable allowing a stiffer cable to be used. The stiffer cable and the incorporation of a reduced friction
material reduces torsion wind-up of the cable and results in smoother wiper operation and a reduction of blade
over travel.
New, larger wheel boxes are fitted in an inverted position from the previous installation. The bulkhead mounting
holes are larger with flats for positive location of the wheel box spindle. The wheel boxes now feature a 40 tooth
gear ratio in lieu of a 32 tooth gear. This reduces backlash and load and further reduces blade over travel. The
wheel box casings are secured with locknuts.
The wheel box spindles now have a splined DIN taper fitting for the new wiper arms which are secured on the
spindle with an M8 nut. The taper improves arm retention.
A new grease is introduced which improves wiper operation at very low temperatures.
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84WIPERS AND WASHERS
4
REPAIR 15.Fit nut plate and fit screws to secure nut plate
and closing panel.
16.Fit knobs to air vent control levers.
17.Fit fascia console.See CHASSIS AND BODY,
Repair.
18.Fit wiper arms.See this Section.
19.Connect battery negative lead.See
ELECTRICAL, Repair.WHEELBOX/DRIVE PIVOT - FROM 02MY
Service repair no - 84.15.25
Remove
1.Disconnect battery negative lead.See
ELECTRICAL, Repair.
2.Remove steering column nacelle.See
STEERING, Repair.
3.Remove wiper motor and drive rack.See this
Section.
4.Remove 2 screws and move heater fan switch
aside.
5.Remove 2 screws securing drivers side demister
duct.
6.Disconnect demister tube and remove duct.
7.Remove bolt and nut and bolt securing steering
column support bracket and remove bracket.
8.Remove 11 screws securing fascia support rail.
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WIPERS AND WASHERS
5
REPAIR
9.Remove cable ties securing washer tube to
windscreen wiper rack tube.
10.Loosen fully 4 nuts securing backplates to wheel
boxes and remove windscreen wiper rack tubes.
11.Remove seals from wheel box spindles.
12.Remove 2 nuts securing wheel boxes and
remove sealing washers.
13.Carefully pull fascia support rail from bulkhead
sufficiently to remove wheel boxes.
Refit
14.Loosen fully but do not remove nuts securing
wheel box back plates.
15.Grease wheel boxes.
16.Fit wheel boxes, fit sealing washers and tighten
nuts to5 Nm (3.7 lbf.ft).
17.Fit spindle seals.
18.Fit wiper rack tubes and tighten wheel box back
plate nuts sufficiently to hold tubes. Tighten
wheel box back plate nuts to6 Nm (4 lbf.ft)
after fitting windscreen wiper motor.
19.Align washer tube to rack tube and secure with
cable ties.
20.Align fascia support rail and secure with screws.
21.Fit steering column support bracket and tighten
bolt and nut and bolt to45 Nm (33 lbf.ft).
22.Fit demister duct to tube, align relay bracket and
secure duct with screws.
23.Position heater fan switch and secure with
screws.
24.Fit wiper motor and drive rack.See this
Section.
25.Fit steering column nacelle.See STEERING,
Repair.
26.Connect battery negative lead.See
ELECTRICAL, Repair.RELAY - WIPER DELAY - FROM 02MY
Service repair no - 84.15.37
Remove
1.Disconnect battery negative lead.See
ELECTRICAL, Repair.
2.Remove 4 screws securing instrument pack and
release pack from fascia.
3.Disconnect 2 multiplugs from warning lamp
panel.
4.Disconnect instrument pack multiplug from main
harness.
5.Remove instrument pack.
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84WIPERS AND WASHERS
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REPAIR
6.Identify and remove relay.
Refit
7.Fit relay.
8.Position instrument pack and connect multiplugs.
9.Fit instrument pack to fascia and secure with
screws.
10.Connect battery negative lead.See
ELECTRICAL, Repair.MOTOR - WIPER - TAIL DOOR - FROM 02MY
Service repair no - 84.35.12
Remove
1.Remove spare wheel from tail door.
2.Raise nut cover, remove nut and release wiper
arm.
3.Remove nut and collect washer securing wiper
motor to tail door.
4.Open tail door.
5.Remove tail door trim casing.See CHASSIS
AND BODY, Repair.
6.Remove bolt securing door locking solenoid to
tail door.
7.Pivot both assemblies and withdraw wiper motor
from tail door.
8.Disconnect multiplugs from wiper motor.
9.Remove wiper motor assembly.
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WIPERS AND WASHERS
7
REPAIR
NOTE: Do not carry out further
dismantling if component is removed for
access only.
10.Remove 2 bolts securing wiper motor to
mounting bracket, remove bracket.
Refit
11.Fit mounting bracket to motor and tighten bolts
to10 Nm (7 lbf.ft).
12.Fit motor spindle to rear door, connect multiplugs
and push motor fully home. Align motor
mounting bracket with solenoid mounting
bracket, fit bolt and tighten to10 Nm ( 7 lbf.ft ).
13.Fit rear door trim casing.See CHASSIS AND
BODY, Repair.
14.Fit washer and nut to rear wiper assembly,
tighten nut to3 Nm (2.2 lbf.ft).
15.Fit wiper arm to spindle, align blade to glass and
tighten nut to17 Nm (13 lbf.ft).
16.Close nut cover.
17.Fit spare wheel and tighten nuts to45 Nm (33
lbf.ft).RELAY - TAIL DOOR WIPER - FROM 02MY
Service repair no - 84.35.38
Remove
1.Remove tail door trim casing.See CHASSIS
AND BODY, Repair.
2.Remove rear wiper motor relay.
Refit
3.Fit relay.
4.Fit tail door trim casing.See CHASSIS AND
BODY, Repair.
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