Hoist Interlock Operation Check - Komatsu 830E Shop Manual

4. Verify that propulsion contactors MF, P1/(P2), GF and GFR drop out and then retard contactors
RP1, RP2, MF, GF, GFR, RP3, RP4, RP5, (and RP6-RP9 if used) pick up and the Dynamic
Retard Light in the cab comes on.
RP1 RP2 MF GF GFR RP3 RP4 RP5 RP6 RP7 RP8 RP9
a. Verify the feedback signals:
RP1FB RP2FB MFFB GFFB GFRFB RP3FB RP4FB RP5FB
RP6FB RP7FB RP8FB RP9FB
5. Release throttle and reduce oscillator frequency to 0. Place selector switch in NEUTRAL.
6. Depress override pushbutton in console, and press reset button on display to clear overspeed
event code.
7. Disconnect oscillator from circuits 77 and 77A and remove. Remove jumpers and reconnect
speed sensor wires.

1.11 Hoist Interlock Operation Check

1. Put Selector Switch in FORWARD, and depress throttle. Propulsion contactors MF, P1/(P2),
GF, and GFR should energize.
FORIN AS
MF P1 (P2) GF GFR
a. Verify feedback signals are present:
FORFB MFFB P1FB (P2FB) GFFB GFRFB
2. If truck body is raised or not installed, momentarily remove metal washer from Body Up Switch.
If body is installed and in down position, momentarily open circuit 71F.
DBUP
3. Propulsion contactors should drop out.
4. Operate Override Switch.
DOS
5. Contactors should respond to throttle only when Override Switch is held.
6. Put Selector Switch in NEUTRAL and release throttle. Reconnect 71F or replace metal washer.
7. Put Selector Switch in REVERSE, and depress throttle.
REVIN AS
a. Verify the feedback signal:
REVFB
8. Propulsion contactors should energize.
MF P1 (P2) GF GFR
a. Verify feedback signals are present:
FORFB MFFB P1FB (P2FB) GFFB GFRFB
9. If truck body is raised or not installed, momentarily remove metal washer from Body Up Switch.
If body is installed and in down position, momentarily open circuit 71F.
DBUP
E3-16 Statex III Electrical Checkout Procedure 2/02 E03012