Repeat this procedure with the motion control levers three (3) times. Step 8-Slowly move motion control levers forward, after the tractor moves approximately five (5) feet, slowly move motion control levers to reverse position.Īfter the mower moves approximately five (5) feet return the motion control levers to the neutral (N) position. With motion control levers in neutral (N) position, slowly disengage clutch/brake pedal. After the engine is running, move throttle control to full speed. Step 7-Sitting in the operators seat, start engine. Step 6-Engage transmission by placing freewheel control into driving position, or by closing the bypass valves on the pumps. Check and add oil as needed for units with an oil resevoir. Step 5-Move motion control levers to neutral (N) position. The air is being removed from hydraulic drive system. NOTE: During this procedure there may be some movement of the drive wheels, but they are not under load. Move levers to full reverse position and hold for five (5) seconds.

Step 4-Move motion control levers to full forward position and hold for five (5) seconds. After the engine is running, move throttle control to slow position. Step 3- Sitting in the operators seat(riders), start engine. The oil resevoir needs to be filled to the specifications listed in the owners manual before starting the purge procedure. Step 2- Disengage transmission by placing freewheel control, located at the back of the frame, in the freewheeling position.Ģa- Mowers with seperate pumps and wheel motors the freewheel is activated by turnign the bypass valves, one on each pump, two full turns. Step 1- Place the rear of the mower safely onto jackstands on a level surface with engine off and parking brake set. IMPORTANT: SHOULD YOUR TRANSMISSION REQUIRE REMOVAL FOR SERVICE OR REPLACEMENT, IT SHOULD BE PURGED AFTER REINSTALLATION BEFORE OPERATING TH E TRACTOR. The following procedure will remove trapped air inside the transmission(s). Also, if you experience loss of drive, or slower response, then the transmission should be purged first. If your mower is new, or has been stored for a long period (longer than 2 months) the transmission needs to be purged before use. This condition is known as cavitation, and is detrimental to the pump since it allows the pump top operate dry. When the pump cavitates it is not pressurizing any fluid, so the transmission is not able to provide the movement needed. If any air is in the fluid, the pump will try to pressurize air. The fluid is pressurized with a pump inside the transmission. Hydrostatic transmissions use oil, under pressure, to provide movement for the tractor.

Hydro gear zt 3100 service manual