Lubrication, Muffler | Craftsman 247.775870 specs

To Service Air Cleaner:

1.Service pre-cleanerafter every 25 hours of use, or at least once a season.

2.Service filter every 100 hours of use, or at least once a season.

3.Service pre-cleaner and filter more often under dusty conditions.

Remove wing nut and cover. For location, see

figure 14 inset.

Slide pre-cleaner off filter. Clean the inside of base and cover thoroughly. See figure 14.

•Clean pre-cleaner as follows:

c.Wash in water and detergent solution, and squeeze (do nottwist) until all dirtisremoved.

d.Rinse thoroughly in clear water.

e.Wrap in a clean clothand squeeze (do not twist) untilcompletely dry, or allow to air dry.

f.Saturate with engine oil and squeeze (don't twist) to distributeoil and remove excess oil.

NOTE: If the pre-cleaneris torn or damaged in any way, replace it,

•If necessary, replace paper filter ---do not attempt to clean. Install new filter on base.

•Slide pre-cleaner over filter.

•Install cover and wing nut.

•Tighten wing nut securely.

Clean Engine

•Clean engine periodically. Remove dirt and debris with a cloth or brush.

•Frequently remove grass clippings, dirt and debris from cooling fins, air intake screen and levers and linkage. This will help ensure adequate cooling and correct engine speed. See figure 15.

_1_ WARNING:areasnearby Temperaturemayexceed 150of muffler°F(65°C)and.

Avoid these areas.

Spark Plug

Clean the spark plug and reset the gap to .030" at least once a season or every 50 hours of operation. See figure 16. Spark plug replacement is recommended at the start of each season. Refer to engine parts list for correct spark plug type.

.030" Feeler

_Guage

Figure 16

NOTE: Do not sandblast spark plug. Spark plug should be cleaned by scraping or wire brushing and washing with a commercial solvent.

Muffler

Inspect periodically, and replace if necessary. If your engine is equipped with a spark arrester screen assembly, remove every 50 hours for cleaning and inspection. Replace if damaged.

WARNING: Do not operate the chipper- shredder without a muffler, or tamper with the exhaust system. Damaged mufflers or spark arresters could create a fire hazard.

LUBRICATION

Lubricate the pivot points on the release bar, hopper assembly, and discharge chute once a season using a light oil. Refer to the lubrication chart in figure 17.

Clean cooling

Figure 15

Yearly or every 25 hours, whichever occurs first, remove the blower housing and clean the areas shown in figure 15 to avoid overspeeding, overheating and engine damage. Clean more often if necessary.

NOTE: Cleaning with a forceful spray of water is not
recommended as water could contaminate the fuel
system.	Figure 17