SERVICE
Service - 39
Checking Hydraulic Oil Level
Check the hydraulic oil level when the hydraulic
system is cold, prior to operating the power unit. If
the hydraulic system is warm, allow one hour for the
hydraulic system to cool before checking the oil level.
Checking the oil level when the hydraulic system is
warm will produce an inaccurate oil level reading.
1.
Attention
After connecting a new attachment or kit that runs
off the power unit’s hydraulic system, run the attach-
ment through a complete cycle, then stop and check
the hydraulic oil level.
Park the power unit on a level surface and adjust
the steering to aim the power unit straight ahead.
2. Fully raise the front hitch and lower the 3-point
hitch (if equipped).
3. Engage the parking brake and shut off the engine.
4. Remove the key from the ignition switch and
allow time for the hydraulic system to cool.
A
B
5. The hydraulic oil tank
(A) is located under the
hood and dash.
6. Check the oil level in
the plastic sight tube
(B) next to the hydraulic
oil tank. The oil level
should be within the
proper range indicated
by the oil level decal on
the hydraulic oil tank.
7. If the hydraulic oil level is below the low mark on
the decal, add HydroTorq XL synthetic hydraulic
oil until the proper level is reached.
Checking Rear Transaxle Oil
Check the rear transaxle oil level when the oil is
cold, prior to operating the power unit.
1. Park the power unit on a level surface.
2. Engage the parking brake and shut off the engine.
A
3. Remove the rear
weights from
the hitch bar (if
equipped).
4. Remove the oil
fi ll plug (A) from
the transaxle and
check to see if the
oil level is even
with the bottom of
the oil fi ll hole.
5. If the oil level is low, add HydroTorq XL synthetic
hydraulic oil until level with the bottom of the oil
fi ll hole.
6. Reinstall the rear weights (if equipped).
Changing Hydraulic Oil And Filters
The hydraulic oil and fi lters should be changed
by an authorized Ventrac dealer only. Refer to the
maintenance schedule for service intervals.
Servicing Closed Loop Hydrostatic Drive
Circuit
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
(pump, front drive motor, 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 fi ltration procedure must be per-
formed. This procedure requires a special Ventrac
remote fi ltering tool and must be performed by a
Ventrac authorized technician.
Servicing Hydraulic Oil 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, fl ip
the oil cooler fan switch from “auto” to “reverse”
operation to blow dust off the oil cooler fi ns.
3. Place the fan switch back in the “auto” position.
Checking Engine RPM
Check engine RPM when engine is warmed up and
not under load. Observe tachometer:
• Kubota gas low idle speed = 1500 ±50 RPM
• Kubota diesel low idle speed = 1500 ±50 RPM
• Kawasaki low idle speed = 1550 ±50 RPM
• Vanguard low idle speed = 1550 ±50 RPM
• High idle speed (all engines) = 3600 ±50 RPM
If engine RPM is incorrect, contact your local Ven-
trac dealer.
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