Lull 944E-42 Service Manual - Manual (Page 71)

4-11 944E-42
Cab and Covers
13. Remove the four capscrews, washers and sheer
pins (9) that secure the cab mount supports to the
frame.
14. If equipped, remove the skylight glass.
15. Use a suitable overhead lifting device and attach to
the top of the cab.
16. When all wiring, hydraulic hoses and fasteners are
disconnected or removed, carefully and slowly lift the
cab and remove it from the frame. Readjust the
position of the sling as needed to help balance the
cab during removal.
17. When the cab is completely clear of the machine,
carefully lower it to the ground. Block up or support
the cab so that it does not move or fall. Assure that
no personnel enter the cab while it is being removed
from the machine.
18. Inspect the condition of the fittings, clamps, hydraulic
hoses, etc. Replace parts as indicated by their
condition.
19. Inspect and replace other machine parts that are
exposed with the cab removed. Repair or replace as
required.
20. Remove the valve plate assembly from underneath
the cab. Refer to Section 8.7.2, “Main Control Valve.”
21. Remove the four capscrews, rebound washers and
cab isolators (10) that secure the cab to the front and
rear cab mount supports.
22. Transfer all remaining components from the original
cab into the new cab.
23. DO NOT attempt to transfer any decals from the
original cab into the new replacement cab. Always
replace decals with new parts. Refer to the
appropriate Parts Manual to order new decals.
4.6 CAB INSTALLATION
1. Install the cab mount support to the front and rear of
the cab. Use the four capscrews, rebound washers
and cab isolators (10). Torque capscrews to
225 - 350 lb-ft (305 - 474 Nm).
2. Install the valve plate assembly from underneath the
cab. Refer to Section 8.7.2, “Main Control Valve.”
3. Block all four wheels to help prevent the machine
from moving. Assure that there is sufficient overhead
and side clearance for cab installation.
4. Attach a suitable overhead lifting device to the top of
the cab.
5. Carefully begin to lift and align the cab with the
mounting holes in the frame. Stop and check that
wiring, hydraulic hoses, cables, etc., will not be
pinched or damaged as the cab is positioned.
Readjust the position of the sling as needed to help
balance the cab during installation.
6. If equipped, install the skylight glass.
7. Install the four capscrews, washers and sheer pins
(1). Torque capscrews to 1,450 - 1,850 lb-ft
(1,966 - 2,508 Nm).
8. Connect all electrical connections that run from the
cab out to the frame and engine compartment.
9. Install the right side console access panel.
10. Connect the supply and return fuel lines at the fuel
tanks.
11. Connect the electrical connection to the fuel level
sending unit.
12. If equipped, connect heating and air conditioning
hoses and electrical connections. Refer to Section
4.4.8, “Heater/Defroster System.”
13. Uncap and reconnect the hydraulic hoses going from
the hydraulic cylinders, brakes and engine
compartment to the cab. All the hoses may be
accessed either above or below the frame.
14. Remove the blocking from between the frame and lift/
lower cylinder.
15. Properly connect the batteries.
16. Carefully examine all cab components, fasteners,
etc., one last time before engine start-up. Rectify any
faulty conditions.
17. Start the engine and check the operation of all controls.
Check for hydraulic fluid leaks. Check the hydraulic
fluid level in the tank and add fluid as required.
Note: When the engine is initially started, run it briefly at
low idle and check the machine for any visual sign of
fluid leakage. STOP the engine immediately if any
leakage is noted, and make any necessary repairs
before continuing.
18. Wait for the engine to cool and check the coolant
level. Add coolant to the overflow bottle as required
to bring the coolant to the proper level.
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