Body-Up Switch Adjustment - Komatsu 930E-2 Shop Manual

BODY-UP SWITCH
The body-up switch (3, Figure 3-8) is located inside the
right frame rail near the front of the body and must be
adjusted to specifications to ensure the proper electri-
cal signal is obtained when the body is raised or
lowered. The body-up switch is designed to prevent
propulsion in "Reverse" when the dump body is not
resting on frame rails. The switch also prevents forward
propulsion with the body up unless the override button
is depressed and held.
Operation
When the body is resting on the frame, actuator arm
(4) causes the electrical contacts in the magnetically
operated switch to close. When the body is raised, the
arm moves away from the switch, opening the con-
tacts. The electrical signal is sent to the control system
and the body-up relay.
The switch must be properly adjusted at all times.
Improper adjustment or loose mounting bolts may
cause false signals or damage to the switch assembly.
1. Switch Mounting Bracket
2. Adjustment Capscrews
D03019 04/01
FIGURE 3-8. BODY-UP SWITCH ADJUSTMENT
3. Proximity Switch
4. Actuator Arm
24VDC System Components
Adjustment
Prior to adjusting the body-up switch, inspect body
pads for wear or damage and replace pads if required.
The body must be resting on the frame in the normal
body down position when adjustments are made.
1. Loosen capscrews (2, Figure 3-8) and adjust prox-
imity switch bracket (3) to achieve an air gap
(dimension "A") between sensing area (cross-
hatched area as marked on switch) and actuator
arm (4), of between 0.50 in. (12.7 mm) minimum
and 0.62 in. (15.9 mm) maximum. Tighten cap-
screws after adjustment.
2. If necessary, loosen actuator arm mounting cap-
screws (5), and position arm until centered over
sensing area of switch. Vertical set up dimension
("B") should be 1.63 in. (41.5 mm). Tighten cap-
screws after adjustment.
Service
Keep sensing area clean, free of metallic dust and other
debris that may damage or inhibit operation of the
proximity switch. If the switch is not functioning or
damaged, the unit must be replaced.
5. Adjustment Capscrews
D3-13