Speed Event Checks - Komatsu 830E Shop Manual

4.0 SPEED EVENT CHECKS

Preparation & Setup
•
Always disconnect 74C at GFR for static testings. Failure to do so may result in damage to bat-
tery boost SCR and/or dead batteries.
•
If the truck is equipped with the Two Speed Overspeed, remove and insulate circuit wire 73LS
going to the control cabinet junction box. There should be one circuit wire 73LS from the termi-
nal block to the FL275 card panel.
•
Wheelmotor Speed Sensors:a. Disconnect external 714 wire and external 77 wire at control
cabinet terminal board.b. Jumper from 77 to 714 and jumper from 77A to 714A. c. Connect an
oscillator to 714 and 714A.
•
All checks are to be made with control power On and the selector switch in FORWARD.
•
Obtain speed event setting information and extended range retarding pickup speeds from the
truck configuration file and use the Retard State Logic screen as instructed below:
Setup PTU
1. With the GE OHV STATEX III MENU on the screen, select TRUCK SETUP (CFG).
2. At the TRUCK SETUP CONFIGURATION MINE MENU screen, select the proper truck configu-
ration file.
3. From the TRUCK SETUP CONFIGURATION MINE MENU screen, select "6) Change/view
Overpeeds."
4. Record the values shown on the OVERPEEDS ENTRY SCREEN.
5. Exit back to the TRUCK SETUP CONFIGURATION MINE MENU and select "1) View truck con-
figuration screen; data curves screen".
6. Record the values for "EXT RANGE PICK_UPS" listed on the second screen that appears.
7. Exit back to the GE OHV STATEX III MENU and select "PTU TALK TO TRUCK".
8. After logging on, select "NORMAL OPERATION" from the GE STATEX III PTU MAIN MENU.
9. From the NORMAL OPERATION menu, select "RETARD STATE LOGIC". Information will be
read from this screen for the following procedures.
E3-34
If the 73LS circuit wire going to the control cabinet junc-
tion box hasn't been removed and insulated, damage may
result to the Rear Suspension Pressure Switches.
Statex III Electrical Checkout Procedure 2/02 E03012