Raymond Tow Tractor 8610

Warning: Ensure the truck is OFF and the battery is disconnected before starting the procedure.

Contactor tips inspected for burnt or pitted surfaces?

Plunger checked for smooth operation with no binding?

Report any issues found during the inspection

Sign off on the contactor maintenance

Turn the truck OFF and disconnect the battery connector

Caution: Note the position of cable ties holding harnesses and cables. When reassembling, attach new cable ties in the same locations.

Remove the cable ties securing the cables and harness above the brake drum

Attach the two brake release bolts and tighten only until snug. Do not overtighten.

Remove the three 6 mm screws that hold the brake to the mounting plate

Lift the brake off the motor. The rotor remains on the motor shaft.

Lift the rotor off the motor shaft.

Warning: This maintenance check requires trained personnel with PPE!

Enter the weight stamped on the battery

Enter the minimum allowable weight on the spec tag

Enter the maximum allowable weight on the spec tag

Is the battery weight within the allowable range?

Inspect all battery connectors and leads for damage and cuts in protective coatings

Check if the battery gates are in position and not damaged

Enter the battery's free play in inches

Is the battery's free play no more than 0.5 inch?

Is the drive wheel clear of the floor?

Is the pot bracket bent correctly?

Is the pot connected to the truck and turned on?

Enter the voltage measured between pin 2 (+ probe) and pin 1 (- probe)

1. Turn the truck OFF and disconnect the battery connector.

2. Remove the four screws [20] securing the PSU housing to the drive unit steering bearing.

3. Remove the screw securing the PSU housing to the tractor frame.

4. Remove the three screws [18] securing the power steering unit (PSU) [32] to the housing [26]. Lift the PSU from the housing.

5. Secure the new power steering unit [32] to the housing with three screws [18]. Apply thread-locking compound (P/N 990-462) to the screws [18]. Torque to 120 in. lb. (13.5 Nm).

6. Install the housing on the drive unit. Tighten the four screws [20] and the screw through the tractor frame finger tight.

7. Check for play between the pinion gear and the ring gear. If necessary, loosen the four screws [20] securing the PSU housing to the drive unit steering bearing and the screw securing the PSU to the tractor frame. Adjust the backlash to 0.002 to 0.010 in. (0.05 to 0.25 mm).

8. Apply thread-locking compound (P/N 990-462) to the four screws [20]. Torque to 28 to 32 ft. lb. (38 to 43 Nm).

9. Tighten the screw through the tractor frame finger tight. Torque the nuts to 36 to 40 ft. lb. (49 to 54 Nm).