Raymond® Walkie Pallet Truck Maintenance Manual
Component Procedures Throttle Potentiometer Adjustment
rotating the Directional/Speed Control Handle fully in both directions. Record the maximum resistance value in both directions. In either direction the resistance value should be 6.5K ± 500 ohms. In addition, the difference between the two readings must be 300 ohms or less.
Maximum Variation Example Handle Position
Resistance (Ohms)
Fully clockwise
6,500
Fully counter-clockwise
6,200
8. To determine the ideal potentiometer position, add the previously recorded readings in Step 7 and divide that result in half. (See example below.) Loosen the potentiometer nut (1/2 turn) so that the potentiometer will move in the bracket when you apply force with your finger. Example: 6,500 ohms CW + 6,200 ohms CCW = 12,700 ohms 12,700 ÷ 2 = 6,350 ohms (ideal maximum resistance value setting) 9. Rotate the throttle control fully in one direction. Move the potentiometer body until the ideal maximum resistance value is obtained. Once the potentiometer is electrically centered, tighten the potentiometer shaft nut securely to prevent the pot from moving in the bracket. 10. Reattach the switch cover to the control handle with the four screws previously removed. 11. Reconnect the battery connector. 12. Test the truck’s operation. 13. Turn the key switch OFF and disconnect the battery connector. 14. Jack and remove the blocks from underneath the truck. See “Jacking Safety” on page 2-11. 15. Reconnect the battery connector.
PDMM-0100 Issued: 5/21/01
6-41
