Operation and maintenance manual

Section 220-0090
Steering System - Steering Valve
SM 1391 5-98
2
SM - 1849
REMOVAL
Numbers in parentheses refer to Fig. 2.
WARNING
To prevent personal injury and property
damage, be sure wheel blocks, blocking
materials and lifting equipment are properly
secured and of adequate capacity to do the job
safely.
1. Position the vehicle in a level work area, apply the
parking brake and switch off the engine. Turn steering
wheel in both directions several times to relieve any
pressure in the steering circuit.
2. Block all road wheels and place battery master
switch in the 'Off' position.
3. Remove blanking cap from remote drain line at the
bottom of the hydraulic tank. Install a length of hose on
remote drain fitting, open drain cock and drain
hydraulic oil into a suitable container. Close drain
cock, remove hose and reinstall blanking cap.
4. Pull floor mat back and remove mounting hardware
securing access cover to the floor plate.
5. Clean outer area of steering valve (1) with a suitable
solvent. Ensure all hydraulic lines connected to
steering valve (1) are identified for ease of installation
and with suitable containers available to catch
leakage, disconnect hydraulic lines. Fit blanking caps
to all open lines.
6. Slide bellows (2) over steering column (3) to allow
access and loosen bolt (5), washer (16) and nut (17)
which tightens coupling (12) onto steering column (3).
7. Support steering valve (1) and remove mounting
bolts (5) and washers (6) securing steering valve (1) to
steering column (3) and bracket (4). Remove steering
valve (1) to a clean area for disassembly.
8. If required, remove bolts (7), washers (8 & 10),
locknuts (11), rubber mounts (9) and bracket (4) from the
floor plate. Discard rubber mounts (9), if damaged.
14
18
19
2
12
13
22
20
21
11
3
15
9
10
8
1
7
5
6
16
17
4
Fig. 2 - Exploded View of Steering Valve Mounting
1 - Steering Valve
2 - Bellows
3 - Steering Column
4 - Bracket
5- Bolt
6 - Washer
7- Bolt
8 - Washer
9 - Rubber Mount
10 - Washer
11 - Locknut
12 - Coupling
13 - Flex Coupling
14 - Steering Shaft
15 - Bolt
16 - Washer
17 - Nut
18 - Bracket
19 - Bearing Assembly
20 - Bolt
21 - Lockwasher
22 - Nitrile Seal