1999 LAND ROVER DEFENDER wipers

84WIPERS AND WASHERS
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DESCRIPTION AND OPERATION WINDSCREEN WIPERS - FROM 02MY
1.LH wheelbox
2.Cable
3.RH wheelbox
4.Wiper motor
5.Spindle with DIN taper arm attachment
6.Spacer
7.Locknut
8.Seal
9.Locknuts
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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
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DESCRIPTION AND OPERATION REAR WIPER - FROM 02MY
1.Rear wiper relay
The rear wiper system is unchanged except for the addition of a wiper motor relay into the electrical circuit.
The new rear wiper relay is located in the tail door, below the wiper motor. The relay coil is energised by a feed
supplied from the rear wiper switch. When the relay contacts close, a feed is supplied via the ignition switch
(position II) and a fuse in the passenger compartment fuse box, through the relay contacts to the wiper motor.
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DESCRIPTION AND OPERATION
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REPAIR PUMP - WINDSCREEN WASHER
Service repair no - 84.10.21
Remove
1.Remove headlamp.See ELECTRICAL,
Repair.
2.Position drain tin to collect any fluid spillage.
3.Disconnect multiplug from washer pump.
4.Disconnect hose from washer pump.
5.Release washer pump from reservoir and
discard sealing washer.
Refit
6.Fit new sealing washer and secure pump to
reservoir.
7.Connect hose and multiplug to washer pump.
8.Fit headlamp.See ELECTRICAL, Repair.
9.Fill reservoir with screen cleaning fluid.JET - REAR SCREEN WASHER
Service repair no - 84.30.09
Remove
1.Release and remove both rear side window
finishers.
2.Remove 8 screws securing both rear grab
handles.
3.Remove both rear grab handles.
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84WIPERS AND WASHERS
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REPAIR
4.Remove 4 trim studs securing upper rear finisher
to body.
5.Release and remove upper rear finisher.
6.Position drain tin to collect any fluid spillage.
7.Disconnect washer tube from jet.
8.Remove nut securing washer jet to body.
9.Remove washer jet.
Refit
10.Fit washer jet to body and secure with nut.
11.Connect washer tube to jet.
12.Remove drain tin.
13.Fit upper rear finisher and secure with trim studs.
14.Fit both rear grab handles and secure with
screws.
15.Fit both rear side window finishers.ARM - WIPER - FROM 02MY
Service repair no - 84.15.02
Remove
1.Raise nut cover on wiper arm and remove nut.
2.Remove wiper arm from spindle.
NOTE: Do not carry out further
dismantling if component is removed for
access only.
3.Remove wiper blade.
Refit
4.Fit wiper blade.
5.Fit wiper arm to spindle and align blade to
windscreen.
6.Tighten nut securing wiper arm to17 Nm (13
lbf.ft),and fit cover.
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REPAIR WIPER MOTOR AND DRIVE RACK - FROM 02MY
Service repair no - 84.15.09
Remove
1.Disconnect battery negative lead.See
ELECTRICAL, Repair.
2.Remove wiper arms.See this Section.
3.Remove fascia console.See CHASSIS AND
BODY, Repair.
4.Remove air vent control knobs.
5.Remove 6 screws, remove fascia closing panel
and collect nut plate.
6.Move cover aside and loosen wiper motor drive
tube nut.
7.Remove 2 screws securing wiper motor, remove
retaining strap and mounting pad.
8.Disconnect multiplug from wiper motor.
9.Remove tube nut and remove wiper motor with
rack.
Refit
10.Lubricate wiper motor drive rack with grease.
11.Feed wiper motor rack into tube, connect
multiplug and fit but do not tighten tube nut.
12.Fit mounting pad and retaining strap, align wiper
motor and tighten screws.
13.Tighten wiper motor tube nut to8 Nm (6 lbf.ft)
and reposition nut cover.
14.Fit fascia closing panel.
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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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