SERVICE
Changing the Rear Transaxle Differential Oil 1. Remove the rear weights from the hitch bar (if equipped). 2. Place a drain pan (minimum 5.5 liter / 6 quart) under the rear transaxle.
Servicing the Closed Loop Hydrostatic Drive Circuit ATTENTION Service or repair of the closed loop drive circuit must be performed by an authorized Ventrac dealer. If any part of the closed loop hydrostatic drive circuit (the pump, the front drive motor, the rear drive motor, or any of the three 1/2” hydraulic lines connecting them together) is serviced or replaced, the Ventrac closed loop drive circuit filtration pro - cedure must be performed. The procedure requires a special Ventrac remote filtering tool and must be performed by a Ventrac authorized technician. Servicing the Hydraulic Cooler 1. Brush dirt and debris from the oil cooler screen in the right fender. 2. Remove the control panel from the top of the right fender. 3. Remove any accumulated debris from inside the fender area. 4. Blow the dust out of the cooler fins from inside the fender area using low pressure air. 5. Reinstall the control panel. Checking the Engine RPM Check the engine RPM when the engine is warm and not under load. Observe the tachometer: • Low idle speed = 1,500 ±50 RPM • High idle speed = 3,600 ±50 RPM If engine RPM is incorrect, contact your Ventrac dealer.
B
3.
Remove the
drain plug (B) from the rear transaxle and allow the hydraulic oil to drain. Re- move the oil fill plug (C) from the rear transaxle to allow venting. NOTE: on some
C
power units, it may be necessary to remove the rear transaxle skid plate to access the drain plug. 4. Reinstall the plug into the rear transaxle and torque to 34-39 Nm (25-29 ft-lbs). 5. Add HydroTorq XL synthetic hydraulic oil (approxi - mately 3.8 liters / 4 quarts) to the fill port in the rear transaxle until the oil is level with the bottom of the oil fill hole. 6. Reinstall the plug into the rear transaxle and torque to 34-39 Nm (25-29 ft-lbs). 7. Clean up any spilled oil and dispose of oil in accor- dance with local laws. ATTENTION Oil is hazardous to the environment. Drain oil into an approved container and dispose of used oil in accordance with local laws. 8. If the rear transaxle skid plate was removed to ac- cess the drain plug, reinstall the skid plate. 9. Reinstall the rear weights (if equipped).
Service - 48
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