Checking Air Intake System

RG9869-UN-15JAN99

Check Clamps

RG9875-UN-12FEB99

Air Restriction Indicator

A - Clamps

B - Air Restriction Indicator

IMPORTANT: The air intake system must not leak. Any leak, no matter how small, may result in engine failure 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, engine and, if present, turbocharger. Tighten clamps as necessary. This will help prevent dirt from entering the air intake system through loose connections causing internal engine damage.

3. IMPORTANT: ALWAYS REPLACE primary air cleaner element when air restriction indicator gauge shows vacuum of 625 mm (25 in.) H₂O, or when reset button has popped up (6068SFM75 and 6068AFM75 only). Also replace element if it is torn, or visibly dirty.

   Test air restriction indicator (B) for proper operation. Replace indicator as necessary.

   IMPORTANT: If not equipped with air restriction indicator, replace air cleaner elements at 500 Hours or 12 Months, whichever occurs first.

4. Replace air cleaner element if restriction indicator gauge shows vacuum of 625 mm (25 in.) H₂0, or when reset button has popped up (6068SFM75 and 6068AFM75 only). Also replace element if it is torn, or visibly dirty.is torn or visibly dirty. Service as necessary. (See REPLACING AIR CLEANER in Service As Required Section.)