Komatsu 830E Shop Manual page 150

4. Remove nuts and star washer from back side of
circuit board that holds the breaker in place.
5. Lift out circuit breaker. Retain flat washers that
were between inner circuit breaker nut and
relay board.
6. Install one nut and two flat washers to each pole
on the circuit breaker. Nuts must be adjusted to
the same height as on the other circuit break-
ers. This is necessary so when cover plate is
installed, it will not press circuit breaker into, or
pull up on, the circuit board. Install new circuit
breaker of the same capacity rating as the one
removed.
7. Install star washer and nut to circuit breaker
poles (on the back side) and tighten nuts.
8. Install cover plate and all screws removed dur-
ing disassembly.
To replace a circuit panel card
DO NOT remove the small screws that hold the
cover plate to the circuit panel. Replace circuit panel
as a complete assembly.
1. Place battery disconnect switch in the "OFF"
position.
2. Remove the two mounting screws (6, Figure 3-
6) and carefully remove the circuit panel card
from the relay board.
3. Line up the new circuit panel in slots and with
the socket on the relay board and install care-
fully.
4. Install two mounting screws (6).
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RELAY BOARD COMPONENTS
Relay Board 1 . . . . . . . . . . . . . . . . . . Turn Signal
1 - Flasher Power Light (Green): This light will be
NOTE: If circuit breakers (CB13 & CB15) are in the
off position, no warning will be noticed until the
clearance light switch is turned "ON".
1 - Flasher Module card.
3 - 15 amp circuit breakers (CB13, CB14, CB15)
4 - Relays
Relay Board 2 . . . . . . . . . . . . . . . Payload Meter
1 - Data Storage Module card.
1 - Payload Stored Light (Green): This light is "ON"
1 - 5 amp circuit breaker (CB29) (To payload
1 - 15 amp circuit breaker (CB28) (To all light
4 - Relays
24VDC Electrical System Components
"ON" when the turn signals or hazard lights are
activated.
• K1 light will be "ON" during right turn signal
operation
• K2 light will be "ON" during left turn signal oper-
ation
• K4 light will be flashing when the turn signals or
hazard lights are in operation.
• Right Turn/Clear Light Relay . . . . . . . . . . (K1)
• Left Turn/Clear Light Relay. . . . . . . . . . . . (K2)
• Clearance Lights Relay . . . . . . . . . . . . . . . (K3)
• Flasher Relay . . . . . . . . . . . . . . . . . . . . . . (K4)
for one second when the payload meter actu-
ally stores the load data into memory.
meter)
relays)
• Light Relay 1 (Green) . . . . . . . . . . . . . . . . (K1)
• Light Relay 2 (Amber) . . . . . . . . . . . . . . . . (K2)
• Light Relay 3 (Red) . . . . . . . . . . . . . . . . . . (K3)
• Light Control Relay . . . . . . . . . . . . . . . . . . (K4)
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