Other Speed Events Checks - Komatsu 830E Shop Manual

4.1 Single Speed Overspeed Truck - Overspeed Settings Check
1. While observing the RETARD STATE LOGIC SCREEN, increase the oscillator frequency from
minimum until the retard contactors RP1 and RP2 pick up in overspeed.
2. Verify the M1- SPD and M2 - SPD mph readings agree with values recorded from the truck con-
figuration file OVERSPEEDS ENTRY SCREEN.
3. Lower the oscillator frequency and verify that retard contactors RP1 and RP2 drop out at the
specified dropout frequency as recorded from the OVERSPEEDS ENTRY SCREEN.
4.2 Two Speed Overspeed Truck (Empty Truck) - Overspeed Settings Check
1. Jumper 71 to 73LS in control cabinet to simulate an empty truck.
2. While observing the RETARD STATE LOGIC SCREEN, increase the oscillator frequency from
minimum until the retard contactors RP1 and RP2 pick up in overspeed.
3. Verify the M1- SPD and M2 - SPD mph readings agree with values recorded from the truck con-
figuration file OVERSPEEDS ENTRY SCREEN.
4. Lower the oscillator frequency and verify that retard contactors RP1 and RP2 drop out at the
specified dropout frequency as recorded from the OVERSPEEDS ENTRY SCREEN.
4.3 Two Speed Overspeed Truck (Loaded Truck) - Overspeed Settings Check
1. Remove jumper 71 to 73LS to simulate a Loaded Truck.
2. While observing the RETARD STATE LOGIC SCREEN, increase the oscillator frequency from
minimum until the retard contactors RP1 and RP2 pick up in overspeed.
3. Verify the M1- SPD and M2 - SPD mph readings agree with values recorded from the truck con-
figuration file OVERSPEEDS ENTRY SCREEN.
4. Lower the oscillator frequency and verify that retard contactors RP1 and RP2 drop out at the
specified dropout frequency as recorded from the OVERSPEEDS ENTRY SCREEN.

4.4 Other Speed Events Checks

NOTE: 3 Step or 7 Step Extended Range Retarding Contactors (RP3-RP5, and RP6-RP9 if used)
should all be picked up at low frequencies, then drop out one by one when frequency is increased
to their specified DROPOUT point. They should then pick up one by one as frequency is
decreased to their specified PICKUP point.
1. With the selector switch in FORWARD position, depress retard pedal.
2. While observing the RETARD STATE LOGIC SCREEN, verify the M1- SPD and M2 - SPD mph
readings agree with values recorded from the TRUCK CONFIGURATIONS DATA CURVES
SCREEN.
3. Turn the oscillator frequency to minimum. Verify that the RP contactors drop out in the
sequence listed, as the oscillator frequency is slowly increased.
a. 3 Step Extended Range Retarding - RP5, RP4, and RP3 contactors.
b. 7 Step Extended Range Retarding - RP9, RP8, RP7, RP6, RP5, RP4, and RP3 contactors.
E03012 2/02 Statex III Electrical Checkout Procedure E3-35