Lull 944E-42 Service Manual User Manual
Page 211
9-53
944E-42
Electrical System
8. Apply the proper voltage to the relay coil at
terminal 86 (8) and attach the ground (-) probe to
terminal 85 (9), ground. An audible click should be
heard indicating that the relay is functioning properly.
9. Install the cover (7) to the side console.
10. Properly connect the batteries.
Testing Relays located in the Engine Compartment
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Properly disconnect the batteries.
5. To remove the relays from inside the engine
compartment, label and remove all the wires
connected to the suspect relay.
6. To access the terminal nuts and washers on the grid
heater relays (10), lift the protective cover and slide it
along the wire, away from the mounting hardware.
Save the terminal nuts and washers for later
reassembly.
7. Remove the mounting hardware from the mounting
bracket on the relay. Remove the relay from the
engine compartment.
8. Inspect the general condition of the relay casing and
terminals. Replace the relay if it is cracked or
damaged in any way.
86
85
30
87
87A
MN1821
8
9
87A
87
86
85
30
MT3141
8
9
MU7580
10