Check and adjust engine valve clearance (3029 and 4039 Engines)

CD30544-UN-19MAY98

NOTE: Valve clearance must be adjusted after the first 500 hours of operation, then every 1000 hours thereafter.

Adjust engine valve clearance as follows or have your authorized servicing dealer or engine distributor adjust the engine valve clearance.

1. Remove rocker arm cover and crankcase vent tube.

2. Using JDE83 or JDG820 Flywheel Turning Tool (A), rotate engine flywheel in running direction (clockwise viewed from water pump) until No.1 piston (front) has reached top dead center (TDC) on compression stroke. Insert timing pin JDE81-4 or JDG1571 (B) into flywheel bore.

3. 
   CD30545-UN-19MAY98

   
   RG6307-UN-03AUG92

   Check and adjust valve clearance to specifications according to following procedures.

   Item	Measurement	Specification
   Valve clearance (engine cold)	Intake	0.35 mm (0.014 in.)

   NOTE: If rocker arm is equipped with adjusting screw and jam nut (A), tighten jam nut to 27 N˙m (20 lb-ft) after adjusting valve clearance.

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4. Reinstall rocker arm cover and crankcase vent tube.

• 
  CD30549-UN-16JUN98

  A - Front of engine

  B - Exhaust valve

  C - Intake valve

  D - No.1 Piston at TDC compression stroke

  E - No.1 Piston at TDC exhaust stroke

  3-Cylinder Engine: NOTE: Firing order is 1-2-3
  
  1. Lock No. 1 piston at TDC compression stroke (D).
  2. Adjust valve clearance on No. 1 and 2 exhaust valves and No.1 and 3 intake valves.
  3. Rotate flywheel 360°. Lock No. 1 piston at TDC exhaust stroke (E).
  4. Adjust valve clearance on No. 3 exhaust valve and No. 2 intake valve.

• 
  RG4776-UN-31OCT97

  A - Front of engine

  B - No.1 Piston at TDC compression stroke

  C - No.4 Piston at TDC compression stroke

  E - Exhaust valve

  I - Intake valve

  4-Cylinder Engine: NOTE: Firing order is 1-3-4-2
  
  1. Lock No. 1 piston at TDC compression stroke (B).
  2. Adjust valve clearance on No. 1 and 3 exhaust valves and No.1 and 2 intake valves.
  3. Rotate flywheel 360°. Lock No. 4 piston at TDC compression stroke (C).
  4. Adjust valve clearance on No. 2 and 4 exhaust valves and No. 3 and 4 intake valves.