Operation and maintenance manual

SM 1393 Rev 1 2-00
3
Section 220-0120
ASSEMBLY
Numbers in parentheses refer to Fig. 1.
WARNING
To prevent personal injury and property
damage, be sure lifting equipment is properly
secured and of adequate capacity to do the job
safely.
1. Press spherical bearings (5) in base end of cylinder
body (1) and piston rod (2) end. Secure spherical
bearings (5) with circlips (6).
2. Install new rod seal (8), wiper (9) and 'O' ring (7), in
end cap (4). Install end cap (4) assembly over piston
rod (2) thread taking care not to damage rod seal (8)
on the thread.
3. Install cushion sleeve (15) in piston rod (2) end.
4. Install new 'O' ring (13) and backup ring (14) in
piston (3).
5. Apply Loctite 242 to the first two threads of piston rod
(2) and, using special tool which can be fabricated as
shown in Fig. 3, screw piston (3) on piston rod (2). Tighten
piston (3) to a torque of 1 356 Nm (1 000 lbf ft).
6. Insert grub screw (11) through bearing ring (10)
groove in piston (3) and into groove machined in
piston rod (2). Tighten grub screw (11) to a torque of
49 Nm (36 lbf ft). Ensure the extreme of grub screw
(11) is below the level of bearing ring (10) groove.
7. Insert new piston seal (12) and new bearing rings
(10) on piston (3).
8. Fully grease piston (3) OD and 'O' ring (7) in end
cap (4).
9. Sling piston rod (2) in a manner to allow careful
leading of assembled piston rod (2) into cylinder body
(1). Take care not to damage piston seal (12) on
cylinder body (1) threads.
10. After piston (3) is installed in cylinder body (1),
push piston rod (2) into cylinder body (1) maintaining
centre lines of piston rod (2) and cylinder body (1)
along the same axis.
11. Before piston rod (2) is fully home, and with slings
still taking some of piston rod (2) weight, engage end
cap (4) thread and screw home.
Steering System - Steering Cylinder
12. Push piston rod (2) to the mid-stroke position and,
using special tool which can be fabricated as shown in
Fig. 2, tighten end cap (4) to a torque of 542 Nm
(400 lbf ft).
INSTALLATION
Numbers in parentheses refer to Fig. 1.
Note: Tighten all fasteners without special torques
specified to standard 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. Install a suitable strap, or other lifting device, around
one cylinder assembly and position cylinder assembly
on the vehicle, with base end of cylinder ready for
mounting.
2. Install spacers (19) and seals (20 & 21) on base
end of cylinder and insert pin (17). Secure pin (17) with
bolt (22), hardened washer (23), washer (25) and
locknut (24).
3. Install spacers (19) and seals (20 & 21) on rod end
of cylinder and insert pin (18). Secure pin (18) with
bolt (22), hardened washer (23), washer (25) and
locknut (24).
4. Repeat steps 1 through 3 for opposite cylinder.
5. Connect the hydraulic oil lines to the cylinder ports
as tagged during removal.
6. Lubricate pins at lube fittings (16) with lubricant specified
in Section 300-0020, LUBRICATION SYSTEM.
7. Check oil level in hydraulic tank and add oil as
required. Refer to Section 230-0040, HYDRAULIC
TANK, for correct fill level and Section 300-0020,
LUBRICATION SYSTEM, for oil specification.