Guardian Technologies 004270-3 Servicing the Engine AIR Filter, Spark Arrestor Muffler

Section 3 – Maintenance

QUIETPACT™ 75D Recreational Vehicle Generator

8.Screw the new filter on by hand, until its gasket lightly contacts the oil filter adapter. Then, tight- en the filter an additional 3/4 to one turn.

9.Remove the dipstick, and wipe it dry with a clean, lint-free cloth. This will be used later to check the oil level.

10.Remove the oil-fill plug, and slowly add the prop- er type and amount of recommended oil (see Section 1.5.3). Periodically use the dipstick to check the oil level and continue to fill the crankcase until the oil reaches the dipstick “FULL” mark. DO NOT FILL ABOVE THE “FULL” MARK.

11.Install the oil-fill plug and the dipstick.

12.Reinstall the air filter.

13.Reattach the front service door; make sure the latches are fully engaged.

14.Start the engine, and check for leaks.

NOTE:

Check the oil level and fill to the “FULL” mark, after checking for leaks. The filter will retain some oil.

3.3SERVICING THE ENGINE

AIR FILTER

To access the engine air filter (Figure 3.2), remove the front service door, located beneath the unit, by retracting the two latches and pivoting the door downward. Loosen the hose clamp at the base of the air filter and remove the filter. Place the hose clamp on the new filter and install it, making sure it is posi- tioned properly before reattaching the service door. Make sure the service door latches are fully engaged.

Figure 3.2 – Engine Air Filter

3.4SPARK ARRESTOR MUFFLER

The exhaust muffler supplied with the QUIETPACT™ 75D is a spark arrestor type. Generac exhaust muf- flers for recreational vehicle generators do not have a spark arrestor screen, but are of the more efficient “toroid” or “swirl” type. To remove carbon and com- bustion deposits from the muffler, proceed as follows (see Figure 3.3):

1.Place the unit above a noncombustable surface, and ensure that the generator exhaust piping is cool.

2.Remove the two screws holding the spark arrestor access plate to the rear floor pan.

3.Remove the spark arrestor access plate and gas- ket.

4.Remove the hex pipe cap from the end of the spark arrestor cleanout pipe.

5.Thread on a 3/8” NPT pipe coupling and pipe nipple to extend the cleanout pipe at least 10 inches (250 mm) below the rear floor pan; addi- tional piping may be added to direct the muffler exhaust away from the cooling air discharge flow beneath the unit.

6.Start and run the engine for approximately 15 minutes.

7.Shut down the engine, and allow the piping to cool.

8.Remove the 3/8” NPT coupling and piping.

9.Apply a graphite-base, anti-seize compound to the cleanout pipe threads.

10.Reinstall the hex pipe cap, spark arrestor access plate, gasket, and two screws.

See the “Service Schedule,” Section 3.13, for recom- mended air cleaner maintenance.

The exhaust system of this product gets extremely hot and remains hot after shutdown. High grass, weeds, brush, leaves, etc., must remain clear of the exhaust. Such materials may ignite and burn from the heat of the exhaust system.

Failure to provide and maintain a spark arrestor

!may be in violation of the law. If this generator is used on any forest-covered, brush-covered, or grass-covered unimproved land, the vehicle owner or operator must maintain the spark arrestor in good condition. In the state of California, the preceding is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands.

12 Generac® Power Systems, Inc.