Lull 944E-42 Service Manual - Manual (Page 72)

Cab and Covers
4-12 944E-42
19. Install the mirrors and all other cab components as
needed, if removed.
20. Unblock the wheels.
21. Close and secure the rear door.
4.7 VALVE PLATE
4.7.1 Valve Plate Removal
1. Park the machine on a firm, level surface. Allow
sufficient overhead and side clearance for cab
removal. Level the machine, fully retract the boom,
lower the boom, place the travel select lever in the
(N) NEUTRAL position, engage the park brake and
shut the engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and steering wheel, stating that the machine
should not be operated.
3. Properly disconnect the batteries.
4. Attach a suitable lifting device to the cab step and
remove the slack.
5. Remove the four capscrews and washers from the
cab step and lower to the ground.
6. Support the valve plate (1) with a suitable lifting
device.
7. From under the valve plate, remove the two
capscrews and washers (2) securing the plate to the
cab mount frame. Lower the valve plate.
8. Disconnect the two tethers (3) from the cab
mounting frame.
9. Remove the two cotter pins, washers and valve plate
hinge pins (4).
10. Disconnect, label, cap and plug all hydraulic hose
connections and fittings.
11. Disconnect and label all electrical connections.
12. Remove the valve plate from the machine.
13. Service individual valve plate components as
required. Refer to Section 8.7.2, “Main Control
Valve.”
4.7.2 Valve Plate Installation
1. Use a suitable lifting device to lift the valve plate into
position under the cab.
2. Uncap and reconnect the previously labeled
electrical and hydraulic hose connections. To
properly reconnect all hydraulic connections refer, to
Section 2.2, “Torque Charts.”
3. Replace the hinge plate pins, washers and cotter
pins to secure the valve plate to the cab mount
frame.
4. Reconnect the two tethers to the cab mount frame.
5. Lift the valve plate and secure with two capscrews
and washers.
6. Attach a suitable lifting device to the cab step and lift
into position under the cab.
7. Replace the four capscrews and washers securing
the cab step. Torque the capscrews to 43 - 78 lb-ft
(59 - 106 Nm).
8. Properly disconnect the batteries.
MU3821
1
2
3
MU4931
4