Inspecting Timing Belt

Inspecting Belt

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

2. Disconnect negative (-) battery cable.

3. 
   MXAL44235-UN-10APR13

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

---




4. 
   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-UN-10APR13

   Engine shown removed from machine for better view.

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

---




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

11. 
    MXAL44238-UN-10APR13

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

---




12. 
    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 tensioner pulley before reinstalling components (see steps below).

Inspecting Tensioner Pulley

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

   
   MXAL44240-UN-10APR13

   Loosen bolt (R) on tensioner pulley (S). Push tensioner arm (T) inward slightly to release tensioner pulley tension from timing belt. Rotate tensioner pulley (S) and check for any noise or if it is loose. If it is loose, tighten bolt on tensioner pulley to specification.

   Bolt	Torque	25 N·m (18 lb-ft)

---




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

3. Install tensioner and push tensioner arm in direction of arrow (U) until the gap between the tensioner 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.

   Bolt	Torque	25 N·m (18 lb-ft)

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

6. Connect negative (-) battery cable.