Cub Cadet 3654, 3660 service manual Removing the cap to prevent dirt from contaminating the oil

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.

3.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.

4.Steering Lever Adjustments: Place the mower on level ground with the engine running, parking brake off and steering levers

25

Page 24 Page 26
Image 25
Page 24 Page 26
Contents Commercial Riding Mower Table of Contents Forward General Safety PrecautionsRelated to Fuel When Mowing Specifications Controls Operating InstructionsSeat Adjustment Lever The Seat Check the fluid levels and tires Initial Adjustments and ServiceAdjust the Mowing Deck Proper Angle or Pitch Leveling the Deck Side to Side Start the Engine Break-In And OperationPage Mower Deck Maintenance and ServiceParking the Mower Removing the Mower DeckSharpening a Blade Changing a BladeChanging the Blade Drive Belts Stop the engine and remove the key from the ignition switch Changing the Spindle AssemblyHydraulic Oil Draining Hydraulic Oil Electrical CircuitInstalling the Battery Battery RemovalSpecific Freezing Gravity Temp F Jump Starting Page Inflation Pressure TiresBrakes Hydraulic Oil Tank and Filter Hydraulic SystemRemoving the cap to prevent dirt from contaminating the oil Page Storage To Put the Mower Back in ServiceDaily Checks Maintenance ScheduleEvery 25 Hour Checks Weekly or Every 50 Hour ChecksEvery 100 Hour Checks Oil wear points. Follow the Oiling ChartYearly Checks Lubrication Chart Wiring Diagram Equipment TWO-YEAR Limited Warranty
Top Page Image Contents