SERVICE
Service - 51
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 ltration pro-
cedure must be performed. The procedure requires
a special Ventrac remote ltering 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. With the ignition key turned to the run position,
ip the oil cooler fan switch from Auto to Reverse
operation to blow dust o the oil cooler ns.
3. Place the fan switch back into the Auto position.
Checking the Engine RPM
Check the engine RPM when the engine is warm and
not under load. Observe the tachometer:
• Low idle speed = 1,550 ±50 RPM
• High idle speed = 3,600 ±50 RPM
If engine RPM is incorrect, contact your Ventrac dealer.
Checking the Engine Oil Level
ATTENTION
Failure to check the engine oil regularly could lead
to serious damage to your engine, if the engine is
run with an incorrect oil level.
• Check the engine oil level with the power unit
sitting on a level surface and with the engine
shut o and the oil cold.
• Keep the oil level between the Full and Add
marks.
• Do not add oil with the engine running.
1. If the power unit has been running, allow the en-
gine and oil to cool.
2. Remove the oil dipstick (A) from the engine and
wipe with a clean cloth.
3.
A
D
Insert the dipstick back into the engine and re-
move again.
4. Check the oil level. The level should be between
the Full (B) and Add (C) marks on the dipstick.
5.
BC
If the oil level is low, remove the oil ll cap (D)
and add small amounts of engine oil to bring the
oil level no higher than the Full (B) level on the
dipstick.
6. If the oil level is above the Full (B) mark, drain
some engine oil to achieve the proper level.
7. Reinstall the dipstick and the oil ll cap.
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