Body Up Switch; Hoist Limit Switch - Komatsu 830E Shop Manual

BODY-UP SWITCH
The body-up switch is designed to prevent propul-
sion in "Reverse" with the dump body raised. This
switch also prevents forward propulsion unless the
override button is depressed and held.
The body-up switch, located on the right frame rail
ahead of the body guide, must be adjusted to within
limits. Improper adjustment or loose mounting bolts
may cause false signals or damage to the body-up
switch assembly. The switch should be checked daily
and the sensing area cleaned of any dirt or metallic
dust accumulation.
FIGURE 3-4. BODY-UP SWITCH ADJUSTMENT
1. Proximity Switch
2. Sensing Area
Adjustment
Adjust the proximity switch bracket to maintain an air
gap (Dimension "A", Figure 3-4) between the sensing
area and actuator bracket, of between 0.50 in. (12.7
mm) minimum and 0.62 in. (15.7 mm) maximum. Set
up measurement "B" should be approximately 1.00
in. (25.4 mm).
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.
D03026
3. Actuator
24VDC Electrical System Components

HOIST LIMIT SWITCH

The hoist limit switch actuates a solenoid in the hoist
circuit to stop the hoist cylinders short of full exten-
sion and prevent possible damage to the dump body
or hoist cylinders.
The hoist limit switch is located inside the right frame
rail above the rear suspension. 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.
The hoist limit switch should be checked daily and
the sensing area cleaned of any dirt or metallic dust
accumulation.
Adjustment
With body raised and hoist cylinders within 10 in.
(254 mm) of maximum travel, make the following
adjustments:
Adjust the proximity switch bracket to maintain an air
gap (Dimension "A", Figure 3-5) between the sensing
area and actuator bracket, of between 0.50 in. (12.7
mm) minimum and 0.62 in. (15.7 mm) maximum. Set
up measurement "B" should be approximately 1.50
in. (38.1 mm).
Service
Keep sensing area clean, free of metallic dust and
other debris that may damage or inhibit operation of
the limit switch. If the switch is not functioning or
damaged the unit must be replaced.
FIGURE 3-5. HOIST LIMIT SWITCH ADJUSTMENT
1. Actuator (On Body)
2. Mounting Bracket
3. Frame
4. Proximity Switch
D3-7