Item 6 - Air Cleaner
Under no engine operation conditions should the air inlet restriction exceed 25 inches of water (6.2 kPa) for non-
turbocharged engines or 20 inches of water (5.0 kPa) for turbocharged engines. A clogged air cleaner element will cause
excessive intake restriction and a reduced air supply to the engine.
Dry type elements should be discarded and replaced with new elements after one year of service or when the maximum
allowable air intake restriction has been reached, whichever comes first. In cases where the air cleaner manufacturer
recommends cleaning or washing the elements, the maximum service life is still one year or maximum restriction.
Cleaning, washing and inspection must be done per the manufacturer's recommendations. Inspection and replacement of
the cover gaskets must also be done per the manufacturer's recommendations.
Item 7 - Drive Belts
New standard V-belts will stretch after the first few hours of operation. Run the engine for 15 seconds to seat the belts,
then readjust the tension. Check the belts and tighten the fan drive, pump drive, battery-charging alternator and other
accessory drive belts after 1/2 hour (15 miles) and again after 8 hours (240 miles) of operation. Thereafter, check the
tension of the drive belts every 200 hours (6,000 miles) and adjust, if necessary. Too tight a belt is destructive to the
bearings of the driven part; a loose part will slip.
Replace all belts in a set when one is worn. Single belts of similar size should not be used as a substitute for a matched
belt set; premature belt wear can result because of belt length variation. All belts in a matched belt set are within .032" of
their specified center distances.