Installation; Adjustment; Fig. 7-25: Boom Elevation Proximity Switch Adjustment - JLG Lull 1044C-54 II Series Service Manual

Installation

Boom Elevation Proximity
Switch

Adjustment

Boom Elevation Proximity
Switch
31200079
3. Remove inner jam nut (Item 2) and proximity switch form transfer
carriage/boom cradle (Item 1). Re-install inner jam nut on proximity
switch for safekeeping.
1. Position outer jam nut (Item 4) on switch body (Item 3) at previously
marked position.
2. Install boom proximity switch in transfer carriage/boom cradle (Item 1).
Install inner jam nut (Item 2). Check gap between end of proximity
switch and boom. See Fig. 7-25.
3. Connect wire harness (Item 5) to proximity switch.
4. Check operation of proximity switch by raising the boom. The Rear
Osc Lock light must come on at approximately 20° of boom elevation.
If the light does not illuminate, stop and lower boom. Proceed to
"Adjustment" below.
Transfer Carriage/Boom Cradle
Proximity Switch
Outer Jam Nut

Fig. 7-25: Boom Elevation Proximity Switch Adjustment

1. Loosen, but do not remove the two (2) jam nuts on the proximity switch
body.
2. Check gap between switch and boom. Gap must be within the range
specified in Fig. 7-25.
3. If Rear Osc Lock light does not illuminate when boom is at
approximately 20° elevation, adjust proximity switch to slightly reduce
the gap. Do not exceed gap tolerances specified in Fig. 7-25. Snug jam
nuts to hold switch in position.
4. Raise boom and check operation of Rear Osc Lock light. The light
must come on at approximately 20° of boom elevation. If light does not
illuminate, stop and lower boom. Repeat Step 3.
5. Tighten jam nuts.
Frame Tilt and Oscillation
0.19" to
0.25" Gap
Inner Jam
Nut
Boom
7-39