Checking Air Intake System

NW270690-UN-15MAY06

Check Air Intake System

IMPORTANT: The air intake system must not leak. Any leak, no matter how small, may result in internal engine damage due to abrasive dirt and dust entering the intake system.

1. Inspect all intake hoses (piping) for cracks. Replace as necessary.

2. Check clamps (A) on piping which connect the air cleaner to the engine. Tighten clamps to 9 N˙m (7 lb-ft) of torque. This will help prevent dirt from entering the air intake system through loose connections causing internal engine damage.

3. IMPORTANT: ALWAYS service air cleaner element when air restriction indicator shows a vacuum of 625 mm (25 in.) H₂O, is torn, or visibly dirty.

   Test air restriction indicator for proper operation. Replace indicator as necessary.