Operation and maintenance manual

SM 1404 Rev 1 10-03
Cab - Cab and Mounting
Section 260-0010
2
REMOVAL
Numbers in parentheses refer to Fig. 1.
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.
Note: Tag all lines, cables and linkages disconnected
during removal to aid in installation.
1. Position the vehicle in a level work area, apply the
parking brake and switch off the engine. Operate
steering right and left several times to relieve pressure
in the steering system.
2. Operate the treadle valve continuously to discharge
the brake accumulators, block all road wheels, place
the steering lock bar in the 'Locked' position and the
battery master switch in the 'Off' position.
3. Pull on handle (inside cab) to release hood catch
and lift up hood assembly.
4. Disconnect the following cables and connectors in
the order given, to prevent serious damage to the
vehicles electrical components.
a - Battery earth cables
b - Battery supply cables
c - Alternator earth cables
d - Alternator supply cables
e - Body hydraulics joystick
f - Transmission (Est-37) connector
g - ECM interface harness connector (30 pin RHS)
h - ECM power harness connector (5 pin RHS)
i - ECM sensor harness connector (30 pin LHS)
j - ECM engine to transmission datalink connector
(6 pin RHS)
5. Carefully loosen brake pipes at base of both
accumulators to check that brake pressure has been
discharged. Tighten brake pipes.
6. 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.
7. Remove mounting hardware and cover plate from
front left hand of cab assembly (1). Tag and disconnect
electrical harnesses and connections.
8. Tag and disconnect the harnesses and hoses at the
underside of the manifold on the right-hand side of the
cab. Disconnect cab earth strap at rear left hand cab
leg.
WARNING
Before disconnecting any air conditioner lines,
refer to Section 260-0130, AIR CONDITIONING.
Refrigerant will rapidly freeze all objects with
which it comes into contact. It can cause
serious and permanent damage to the eyes and
skin.
9. Evacuate air conditioning system and disconnect air
conditioner lines. Refer to Section 260-0130, AIR
CONDITIONING. Fit blanking caps to all open lines
and fittings.
10. Ensure heater lines are identified for ease of
installation and with suitable containers available to
catch leakage, disconnect heater lines. Fit blanking
caps to open line ends and fittings.
11. Loosen the steering coupling attaching the upper
column to the lower column. Remove mounting
hardware securing the steering valve mounting plate to
the cab floor and lower the assembly from the cab.
12. Remove mounting hardware securing the treadle
valve and accelerator pedal mounting plate to the cab
floor and lower the assembly from the cab.
13. With a suitable container in position, drain the
cooling system. Refer to Section 210-0000, COOLING
SYSTEM.
14. Remove mounting hardware and cover plate from
cradle assembly at rear left hand side of the cab.
15. Ensure brake lines and steering lines are identified
for ease of installation and with suitable containers
available to catch leakage, disconnect lines. Fit
blanking caps to all open lines and ports.
16. Unhook hoses from elastic supports at underside of
spill guard (9) and secure hoses away from guard so as
not to foul when lifting the cab.
17. Attach suitable lifting equipment to support spill
guard (9) and remove bolts (11), lockwashers (12) and
locknuts (13) securing spill guard (9) and supports (10)
to window guard (8). Taking care to prevent damage to