Brakes - Parking Brake Cable Squeaks On Bumps
No: 70/03/04/NAS
Ref:
Issue: 1
Date: June 18, 2004
Squeak Noise from Handbrake Grommet
AFFECTED VEHICLE RANGE:
New Range Rover (LM) All
SITUATION:
SQUEAK EVIDENT IN PASSENGER COMPARTMENT
The customer may complain of a squeaking noise heard during suspension articulation in dry weather as when traversing a speed bump. The noise
may appear to be originating from a range of locations (the rear suspension, hand brake lever or rear of the center console) in the middle of the
vehicle. The handbrake cable passes through a support bracket grommet under the vehicle. During suspension articulation contact between the cable
outer sleeve and grommet can generate a squeaking noise, which can be heard inside the vehicle.
RESOLUTION:
INSPECT FOR SOURCE AND LUBRICATE GROMMET
A witness mark may be present on the cable sleeve, extending either side of the bracket grommet. Lubrication of the grommet and cable should
eliminate the problem.
PARTS INFORMATION
DDW WARRANTY CLAIMS:
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
Material allowance claim OTHER = $0.55 Normal warranty policy and procedures apply.
REPAIR PROCEDURE
APPLY KRYTOX TO BUSHING
1. Remove any debris, which may have accumulated in the bracket grommets.
NOTE:
The bracket should be located perpendicular to the cable on the rear suspension upper control arm when the vehicle is in standard ride
height and resting on the wheels.
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2. Inspect the cable support brackets (left-hand and right-hand) and verify correct alignment. (Figure 1)
3. If the bracket is misaligned, loosen the bracket fastener and perform the following:
^ Position the bracket so that the grommet is perpendicular to the travel of the cable.
^ Hold the bracket in position to prevent rotation. Tighten the fastening bolt to 5 Nm (4 lbf.ft).
4. Apply Krytox spray (LRN100050S) around the interface of the handbrake cable and grommet. (Arrowed in Figure 1)
5. Assess vehicle to determine if the squeak has been eliminated and apply additional Krytox if necessary.
