Cub-cadet 3654 User Manual download pdf (Page 25)

rest of the hydraulic system. Fill the replacement filter with a good grade of

20W-50 oil and lubricate the sealing surface. Screw the filter onto the filter

base until it seats and then another one-half turn to seal.

Note: Always wipe off the hydraulic tank fill cap and the area around it before

removing the cap to prevent dirt from contaminating the oil.

Remove the fill cap and fill the tank with the same 20W-50 oil selected for

the filter until the oil level is up to the level of the second hole in the fill

tube. Leave this air space for expansion. Start the engine and let it run at

idle for about five minutes. Check the filter for leaks. Idling the engine and

the pumps in this way will purge any air from the system. Shut off the

engine and recheck the oil level in the tank. Top-off if necessary until the oil

level is up to the second hole n the fill tube.

Hydrostatic Transmissions and motors:

The pumps are the

hardest-working components in the hydraulic system. They are in

operation all the time the engine is running. Because of extremely

close tolerances, wear is an important factor in their life.

Contami-

nants

in the hydraulic oil and

cavitation

does the greatest harm to

the pumps. Cavitation is a blockage in the supply lines that pro-

duces a partial vacuum causing violent bubbling in the hydraulic oil

in the pump.

Check the two suction hoses (the hoses connected to the filter)

daily before starting the engine. Look for a flattened condition or

any leaks and repair or replace as necessary. A flattened or leakng

suction hose will permit cavitation to develop which can destroy the

pumps in a short time.

Contaminants or foreign matter in the oil will also damage the

pumps . To prevent this, use a filter that captures particles as small

as 30 microns or 30 millionths of a meter in diameter. You can help

in the battle against dirt by being very careful when you remove or

repair a component in the hydraulic system. Thoroughly clean off

any component before you work on it. Plug the ends of any hose or

line you remove with a rubber or plastic plug. Use plastic caps to

seal off the ends of hydraulic fittings. Place any component you

remove in a clean plastic bag so it can’t pick up dust or dirt. Clean

your hands frequently when working on the hydraulic components.

Note: The pumps are not owner-repairable. If a pump fails, call our Service

Department for a replacement. Do not disassemble the pump.

Steering Lever Adjustments:

Place the mower on level ground

with the engine running, parking brake off and steering levers

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Cub-cadet 3654 User Manual Page 25

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