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Engine Maintenance
Servicing Air Cleaner
Service Interval: Every 50 hours (Every 25 hours if
operating conditions are extremely
dusty or sandy)
Every 50 hours
Every 200 hours
1. Remove knob, O–ring and cover (Figure 35).
2. Remove foam pre–cleaner by sliding it off the paper
element.
• Wash foam pre–cleaner in detergent and warm
water.
• Wrap foam pre–cleaner in cloth and press dry.
Do not wring precleaner. Allow to air dry.
• Saturate foam pre–cleaner in engine oil. Press to
remove excess oil.
3. Reinstall on paper cartridge.
Do not wash the paper element or clean it with
compressed air, as damage will occur.
Figure 35
1. Knob & O–ring
2. Air cleaner cover
3. Wing nut
4. Inner cover
Note: With air cleaner disassembled, check
air cleaner components for damage. Replace if
necessary.
5. Breather seal
6. Foam pre–cleaner
7. Paper element
4. Reinstall element with pre–cleaner, breather seal,
inner cover, wing nut, air cleaner cover, O–ring and
knob.
5. Tighten knob 1/2 to 1 turn after knob contacts
cover. Do not overtighten.
Changing Engine Oil And Filter
Service Interval: After the first 50 hours
Every 100 hours
1. Raise bed (if so equipped) and place safety support
on extended lift cylinder to hold up bed.
2. Remove drain plug and let oil flow into drain pan
(Figure 36). When oil stops, install drain plug.
1. Engine oil drain plug
2. Engine oil filter
3. Remove oil filter (Figure 36). Apply a light coat of
clean oil to the new filter seal before screwing it
on. Screw filter on until gasket contacts mounting
plate, then tighten 1/2 to 2/3 of a turn. DO NOT
OVER–TIGHTEN.
4. Add oil to crankcase, refer to Check Engine Oil.
Replacing Spark Plugs
Service Interval: Every 800 hours
Replace spark plugs to assure proper engine performance
and reduce exhaust emission level.
Correct spark plug to use is a Champion RC 12YC or
equivalent.
Recommended air gap is .040".
Note: The spark plug usually lasts a long time; however,
the plug should be removed and checked whenever the
engine malfunctions or every 800 hours.
36
Figure 36
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