Hustler Turf ATZ, Super Z manual Engine air filter, Priming bulb, Recommended service procedure

Priming bulb

Figure 4-5

Engine air filter

Perform engine air filter maintenance per the Service Interval chart shown elsewhere in this manual.

A specially designed dry filter is standard equipment on these tractors and supplies clean combustion air to the engine. Some examples of the air filter are shown in Fig. 4-6 & 4-7.

Recommended service procedure

1.Release clamps and remove element. Clean the canister with a damp cloth.

2.Before installing a new element, inspect it by placing a bright light inside and rotate the element slowly, looking for any holes or tears in the paper. Also check gaskets for cuts or tears. Do not attempt to use a damaged element which will allow abrasive particles to enter the engine.

3.Reinstall the dust cup. Make sure it seals all the way around the air cleaner body, then tighten the clamps.

4.Check all fittings and clamps periodically for tightness and inspect hoses for holes or cracks.

5.Periodically check the intake hose for signs of ingested dust. Locate and repair the source of ingested dirt.

6.Never operate a machine without an air filter installed.

Safety filter

Some Hustler tractors are equipped with a safety filter. The filter element slides over the safety filter.

NOTE: The safety filter does not require servicing unless it becomes contaminated with dirt or moisture. Fig. 4-8

Overservicing

Overservicing occurs when an air filter element is removed for cleaning or replacement before it is necessary. Each time the filter is removed a small amount of dirt and dust could fall in the intake system. This accumulated dirt can cause a dusted engine. It only takes a few grams of ingested dirt over the normal service life of an engine to cause a dusted engine.

Do not clean element, replace with a new element only. Cleaning used air filter elements, through improper cleaning procedures, can get dust on the inside of the filter causing dirt ingestion and engine failure.

It is important to note that whenever an air filter element is cleaned by any method, the person or company performing the cleaning assumes responsibility for the integrity of the filter from then on. The warranty for air filters expires upon cleaning or servicing in any manner because the condition of the filter after servicing is completely out of their control. Therefore, on a dust ingested engine failure, there will be no warranty consideration if the air filter element has been cleaned or serviced in any manner.

A partially dirty air filter element works better than a new element.

Pre-cleaner

Canister

Figure 4-6

Pre-cleaner

Canister

Figure 4-7

Safety filter

Figure 4-8

Therefore, a dirty filter element is not bad for the engine unless it is excessively restricting the air flow and engine performance is affected. The reason is simple. The media in the filter must be porous to allow air to pass through it. When dirty air passes through the filter, the dirt plugs some of the holes in the media and actually acts as part of the filter media. When the next round of dirt enters, the first dirt helps filter out even smaller particles making the filter more efficient at stopping dirt from entering the engine. This is referred to as barrier filtration.

Of course, at some point the filter media becomes too clogged to allow air to pass.

The mowing conditions will determine the frequency of air filter element changing.

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