Operation and maintenance manual

Section 220-0090
SM 1391 5-98
5
Steering System - Steering Valve
SM - 538
22. Install new 'O' rings (19) in gear rim (18). Install
gear wheel (17) and gear rim (18) on driveshaft (13).
Note: Install gear wheel (17) on driveshaft (13) so that
a tooth base in gear wheel (17) is positioned in relation
to the shaft slot, as shown in Fig. 6. Turn gear rim (18)
to line up the seven through holes to valve housing (2).
23. Install spacer (14) in gear wheel (17).
24. Install end cover (20) in position on valve housing
(2). Remove mounting fork tool from assembly.
25. Install roll pin (22) in bolt (23) and install bolt (23)
with washer (21) in bushing (4) hole.
26. Secure end cover (20) with remaining washers
(21) and bolts (24). Tighten bolts (23 & 24) to a torque
of 30 Nm (22 lbf ft).
27. Turn valve housing (2) in vice and install seal ring
(1) in valve housing.
28. Plug valve housing (2) ports to prevent ingress of
dirt prior to installation.
INSTALLATION
Numbers in parentheses refer to Fig. 2.
Note: Tighten all fasteners without special torques
specified to torques listed in Section 300-0080,
STANDARD BOLT AND NUT TORQUE
SPECIFICATIONS.
Note: Tighten all hydraulic lines fitted with ORFS
connections, as described in Section 220-0000,
STEERING SYSTEM SCHEMATIC. Renew all
'O' rings where used.
WARNING
To prevent personal injury and property
damage, be sure blocking materials and lifting
equipment are properly secured and of
adequate capacity to do the job safely.
1. If removed, secure rubber mounts (9) and bracket
(4) to cab floor plate with bolts (7) washers (8 & 10)
and locknuts (11). Tighten bolts (7) to a torque of
30 Nm (22 lbf ft).
2. Install steering valve (1) through bracket (4) and
secure to steering column (3) and bracket (4) with
bolts (5) and washers (6).
SM - 539
Fig. 5 - Positioning Driveshaft (13) With Mounting Fork
15. Secure valve housing (2) in a soft jawed vice, end
cover (20) up.
16. Install check valve ball (3) into the hole, as shown
in Fig. 3.
17. Screw threaded bushing (4) lightly into check valve
ball (3) hole. The top of bushing (4) must lie just below
the surface of valve housing (2).
18. Install new 'O' ring (15) in valve housing (2).
19. Install distributor plate (16) on valve housing (2),
ensuring channel holes match the holes in valve
housing (2).
20. Insert driveshaft (13) in spool (9) bore ensuring
that the slot is parallel with cross pin (10).
21. Place driveshaft (13), as shown in Fig. 5, so that it is
held in position with the mounting fork (shown in Fig. 8).
Fig. 6 - Relationship of Shaft To Gear