hecht 3635 - Maintenance Schedule; Oil Change

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MAINTENANCE SCHEDULE
REGULAR SERVICE PERIOD (1)
Before each use
First month
or 20 Hrs.
Every 3 months
or 50 Hrs.
Every 6 months
or 100 Hrs.
Every year
or 300 Hrs.
Engine oil
Check level •
Change • •
Air cleaner
Check •
Clean • (2)
Change •
Sediment cup Clean •
Spark arrester Clean Every 100 Hrs (3)
Spark plug
Clean - Adjust •
Change •
Idle speed Check - Adjust • (3)
Combustion chamber Clean • (3)
Fuel tank and filter Clean • (3)
Valve clearance Check - Adjust • (3)
Fuel tube Change Every 2 years
Impeller Check • (3)
Pump chamber Check • (3)
(1) Service more frequently when used in dusty areas.
(2) Change engine oil every 25 hours when used under heavy load or in high ambient
temperatures.
(3) These items should be serviced by an authorized servicing dealer of our company, unless you
have the proper tools and are mechanically proficient.
OIL CHANGE
It is recommended to ask authorized service for oil change.
Drain the engine oil when the engine is warm. Warm oil drains quickly and complete.
Attention: Do not drain oil when the engine is running!
When you drain the oil from the top oil fill tube, the fuel tank must be empty or fuel can leak
out and result in a fire or explosion.
1. Disconnect the spark plug (fig. 12) wire and keep it away from the spark plug.
2. Place a suitable container next to the engine to catch the used oil.
3. Remove the oil filler cap/dipstick. (fig. 5a).
4. Remove the drain bolt (fig. 5B) and allow the used oil to drain completely into the container.
(fig.14)
5. For engine without drain plug, we recommend to use oil extractor pump, or drain the oil
into the container by slightly tilting the engine toward the oil filler cap/dipstick. Before tilting
the machine, remove fuel from tank. Keep the spark plug end of the engine up.