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.
Note: After unit is up to operating tempera- ture, turn off engine and
3.Hydrostatic Pumps 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 impor- tant factor in their life. Contaminants in the hydraulic oil and cavitation does the greatest harm to the pumps. Cavitation is a blockage in the supply lines that produces a partial vac- uum causing violent bubbling in the hydraulic oil in the pump.
Check the two suction hoses (the hoses con- nected 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 25 microns or 25 millionths of a meter in diame- ter. You can help in the battle against dirt by being very careful when you remove or repair a component in the hydraulic system. Thor- oughly 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 work- ing on the hydraulic components.
Note: The pumps are not
4.Steering Lever Adjustments: The steering lever controls on this Zero Turn Mower (ZTM) incorporate a patented interlock mechanism that secures them in their Neutral position whenever the Park Brake lever is applied. Additionally, the lap bars can be opened in any position - Neutral, when traveling For- ward, when traveling in Reverse, or when exe- cuting a
feature with hydraulic dampers to provide smooth,
Whenever the Park Brake lever is moved rear- ward to the Park Brake engaged position, a cable mechanism, connected to each drum brake on the hydrostatic wheel motors, applies force to each brake lever so that each wheel brake mechanism can prevent brake drum and wheel rotation. At the same time, a second cable and linkage mechanism is acti- vated to secure both lap bars in their Neutral positions and to activate the Park Brake switch. Both lap bars must be in their Neutral positions for the neutral lock linkage to func- tion - the
Note: Both lap bars must be in their Neutral positions for the Park brake interlock mecha- nism to function so as to prevent lap bar movement (movement that would activate the hydrostatic pumps producing Forward or Reverse travel rotation of the wheel motors) and to allow the Park Brake switch to be acti- vated.
Whenever the Park Brake is applied (I.E., the Park brake lever moved completely rearward in the control panel slot), the lap bars should be secured in their Neutral positions by the linkage rods moving into the holes in the lap bars. This lap bar Neutral lock mechanism also activates the Park brake switch, which allows for the engine to be started. If the lap bars are in their Neutral positions, and they are not “locked” so as to prevent movement when the Park brake is applied, then the link- age from the RTN on the hydrostatic pumps and the lap bars must be adjusted. This is done by determining which side (or both) rod is not aligned to the hole in the lap bar, then locating that side linkage rod
Dampers are incorporated into the lap bar linkage to provide smooth,
Note: The engine should be able to be started whenever the Park Brake is applied, and the lap bars are locked in their Neutral
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