Water Pump Belt Service

The water pump pulley is a split type. Adjust the tension by adding or removing shims between the pulley sheaves. See the specification chapter for the correct water pump belt tension settings.Belt Tension

    Warning
  • Risk of Injury
  • The unit can start at any time without warning. Press the OFF key on the HMI control panel, place the unit Service Switch (On/Off switch) in the Off position, and disconnect the battery before inspecting or servicing any part of the unit.
    Caution
  • Risk of Injury
  • Do not attempt to adjust belts with the unit running.

Belt Removal

USING ULTRASONIC BELT TENSION GAUGE 2043185

CHECK AND ADJUST TENSION WATER PUMP BELT

  1. Turn the unit OFF and disconnect the negative battery terminal to ensure unit cannot be operated.

  2. Access the front of the engine.

  3. Remove the (4) nuts from the water pump pulley.

  4. Remove the pulley shims, washer, and outer pulley sheave.

    Note Make note of the shim location for reassembly.

    1. Pulley Nuts (4) 4. Outer Pulley Sheave
    2. Extra Shims for Belt Tension Setting 5. Belt
    3. Washer    

  5. Remove the belt from the unit and inspect all pulley sheaves. Replace if excessive wear is found.

Belt Installation and Tension Setting

  1. Install the belt around the crankshaft pulley and water pump inner sheave hub.

  2. Install the outer pulley sheave, washer, extra shims, and (4) pulley nuts. Torque the nuts to specification: 6.6 ft-lbs (9 Nm).

    3. Important Belt tension is adjusted by adding, removing, or changing the thickness of shims between the water pump pulley sheaves. It is important to note the number of and thickness of any shims that are removed during service procedures.

  3. Check belt tension using a commercially available belt tension tool.

    Water Pump Belt Tension Specification
    New Belt 126 Hz (40 lbs)
    Field Reset (used belt) 118 Hz (32 lbs)

  4. Adjust shims as necessary by removing the (4) pulley nuts, shims, washer, and outer sheave. Change the thickness or number of shims in Location 1. Extra shims are found and stored at Location 2 .

    • Additional shims can be purchased and are found in the unit’s parts manual.

    Location 1:

    Shims To Adjust Belt Tension

    Location 2:

    Spare Shims Kept Here

  5. After belt tension is set correctly, ensure the (4) pulley nuts are torqued to specification: 6.6 ft-lbs (9 Nm).

    6. Important Rotating the engine allows the belt to seat properly in the sheaves and ensures the (4) pulley nuts can be properly tightened.

  6. Manually rotate the engine four revolutions or connect the unit battery and run the unit for 1–2 minutes.

  7. Verify belt tension and re-tighten the (4) pulley nuts to specification: 6.6 ft-lbs (9 Nm).

  8. Connect battery terminals and verify unit function.

Parent topic: Belts