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BODY-UP SWITCH
Body-up switch (3, Figure 3-8) is located inside the
right frame rail near the front of the body. It must be
adjusted to specifications to ensure that the proper
electrical signal is obtained when the body is raised
or lowered. The body-up switch is designed to pre-
vent propulsion in REVERSE when the dump body is
not resting on the frame rails. The switch also pre-
vents 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
contacts. 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 assem-
bly.
D03036 10/06
Adjustment
Before adjusting the body-up switch, inspect the
body pads for wear and damage. Replace the body
pads if required. The body must be resting on the
frame in the normal body down position when adjust-
ments are made.
1. Loosen cap screws (2, Figure 3-8) and adjust
2. If necessary, loosen actuator arm mounting cap
Service
Keep the sensing area clean and free of metallic dust
and other debris that may damage or inhibit opera-
tion of the switch. If the switch is damaged or not
functioning, the switch must be replaced.
FIGURE 3-8. BODY-UP SWITCH
24VDC Electrical System Components
proximity switch bracket (3) to achieve an air
gap (dimension "A") of 12.7 to 15.9 mm (0.50 to
0.62 in.) between the sensing area (cross-
hatched area as marked on the switch) and
actuator arm (4). Tighten the cap screws after
the adjustment.
screws (5), and position arm until centered over
sensing area of switch. Vertical set up dimen-
sion ("B") should be 41.5 mm (1.63 in.). Tighten
the cap screws.
1. Switch Mounting Bracket
2. Adjustment Cap Screws
3. Proximity Switch
4. Actuator Arm
5. Adjustment Cap Screws
D3-15
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