Override Operation Check - Komatsu 830E Shop Manual

a. "RETARD" should be highlighted:
RETARD
3. Momentarily jumper from circuit 71 to terminal "A" on GFIP.
GFAULT
4. All contactors should remain energized. Event code 01 should appear on two digit display. Elec-
tric system fault light should come on.
5. Release retard pedal.
6. With jumper removed from circuit 71 to terminal "A", operate Override pushbutton on console to
reset electric system fault light. Press reset button on two digit display panel to clear event
code.

1.8 Override Operation Check

1. Move selector switch to FORWARD, and depress throttle fully.
FORIN AS
a. Verify the feedback signal:
FORFB
2. Propulsion contactors MF, P1/(P2), GF and GFR should pick up.
MF P1 (P2) GF GFR
a. Verify the feedback signals:
MFFB P1FB (P2FB) GFFB GFRFB
3. Depress retard pedal.
RS
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. MF, GF and GFR
must pick up after RP1 and RP2 but timing is very close.
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. Operate Override Switch.
DOS
6. Verify that retard contactors RP1, RP2, MF, GF, GFR, RP3, RP4, RP5, (and RP6-RP9 if used)
drop out. Propulsion contactors P1/(P2) should pick back up when RP1 and RP2 drop out. MF,
GF and GFR should then pick up.
P1 (P2) MF GF GFR
7. Release Override Switch. The propulsion contactors drop out and retard contactors pick back
up (as in step 4).
8. Release retard pedal and throttle pedal.
E3-14 Statex III Electrical Checkout Procedure 2/02 E03012