LR3/Disco 3
The steering column is attached to the in-vehicle crossbeam and secured with four, pan head, thread forming Torx
screws. The two forward attachment screws are fixed through the column mounting bracket, the two rearward mounting
screws also pass through the shearing capsules. In the event of a high energy frontal impact, the shearing capsules
remain fixed to the crossbeam, but the 'U' bracket (with the main body) disengages from the capsules, allowing the
column to shorten axially (collapse), absorbing energy to reduce occupant loading.
The column comprises a cast magnesium roof bracket which is attached to the in-vehicle crossbeam. Attached to the roof
bracket is a pivot housing, a 'U' bracket, upper and lower shafts and a main body. The roof bracket has two hooks which
locate in slots in the in-vehicle crossbeam. The hooks assist in supporting the weight of the column during removal or
installation.
The pivot housing is attached to the forward end of the roof bracket with two pivot pins. The pivot housing allows for
adjustment of the column rake and contains a bearing which supports the column lower shaft.
The 'U' bracket is attached to the roof bracket by a screw, bush and plastic washer assembly (third fixing) located in a slot
in the top of the roof bracket. When the column is assembled into the vehicle, the shearing capsules, which are attached
to the 'U' bracket, are clamped up against the roof bracket by the fixing screws, preventing movement of the 'U' bracket.
The main body is positioned in the 'U' bracket via the lever bolt. The bolt is captive within the vertical slots in the 'U'
bracket and the horizontal slots in the main body. The bolt also passes through the clamp plate assemblies (one on either
side of the 'U' bracket). The body houses the middle and upper bearings through which the upper shaft is located. Two
offset holes in the main body provide for the attachment of the column lock assembly.
7
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Lock assembly
8
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Cam plate (part of adjustment lever)
9
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Fixed cam
10
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Adjustment lever
11
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Brake pad
12
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Lever nut
13
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Lever bolt
14
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Shearing capsule (2 off)
15
-
Clamp plate assembly (2 off)
16
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Adjustment spring
17
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Main body
18
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Strap (2 off)
19
-
Steering angle sensor
20
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Pivot pin
21
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Pivot housing
22
-
Universal joint
23
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Bush
24
-
Pressure washer (2 off)
25
-
Upper shaft
26
-
Upper bearing
27
-
Tolerance ring
28
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Lock collar
29
-
Middle bearing
30
-
Spring
31
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Retainer
32
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Lower shaft
33
-
Retaining ring
34
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Driving collar
35
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Swing yoke
36
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Lower bearing retaining ring
