Inspecting Timing Belt


Inspecting Belt

  1. Park the machine safely. (See Parking Safely in the SAFETY section.)

  2. Disconnect negative (-) battery cable.

  3. MXT020115
    MXT020115-UN-03MAY17

    Remove two bolts (A) and belt cover (B) from machine.


  4. MXAL44236
    MXAL44236-UN-10APR13

    Remove bolt (C) and slide coupler forward onto driveshaft (D).


  5. Remove two bolts (E) and remove driveshaft.

  6. Loosen bolt (F) and bolt (G).

  7. Rotate alternator (H) and remove belt (I) from alternator pulley, water pump pulley (J), and crankshaft pulley (K).

  8. Remove four bolts and water pump pulley (J).

  9. MXAL44237
    MXAL44237-UN-10APR13

    Engine shown removed from machine for better view.

    Remove bolt (L) and dipstick tube (M).


  10. Remove bolt (N) and remove crankshaft pulley (K). Use a puller if necessary.

  11. MXAL44238
    MXAL44238-UN-10APR13

    Remove seven bolts (O) and timing belt cover (P).


  12. MXAL44239
    MXAL44239-UN-10APR13

    Inspect timing belt (Q) for cracks, fraying, wear, or damage. If timing belt needs to be replaced, see the technical manual for your machine or see your John Deere Dealer.


  13. Inspect tensioning pulley before installing components. (See the following steps.)


Inspecting Tensioner Pulley

  1. Avoid damage! Do not rotate belt or engine pulleys from the current position. There are timing marks on the bottom and top of engine that aligns critical internal engine components.

    MXAL44240
    MXAL44240-UN-10APR13

    Loosen bolt (R) on tensioning pulley (S). Push tensioning arm (T) inward slightly to release tensioning pulley tension from the timing belt. Rotate tensioning pulley (S) and check for any noise or if it is loose. If it is loose, tighten the bolt on the tensioning pulley to specification.
    BoltTorque25 N·m (18 lb·ft)


  2. If the tensioning pulley is noisy, remove bolt (R) and remove tensioning pulley (S).

  3. Install tensioner and push tensioner arm in direction of arrow (U) until the gap between the tensioning pulley (S) and the bottom of the water pump housing is approximately 5 mm (0.2 in) (V) as shown.

  4. Tighten tensioner bolt (R) to specification.
    BoltTorque25 N·m (18 lb·ft)

  5. Reverse inspecting belt steps to install all components in reverse order of removal.

  6. Connect negative (-) battery cable.

OUMX068,000128D-19-20170503