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MAINTENANCE
VERSA PRO 03/09 Maintenance Section 5-12
© 2009 Alamo Group Inc.
MAINTENANCE
HYDRAULICS
GENERAL
VERSA PRO hydraulic system consists of two circuits. The power circuit drives the cuttershaft. The control
circuit lifts and tilts the cutter unit.
NOTE: It is important that pipe thread sealant be used on solid connections only; never on connections
between swivel fittings or fittings with "O" rings and straight threads. Use pipe thread sealing compound.
DO NOT substitute other types of sealant, such as teflon tape, paint, shellac, etc.
INITIAL START-UP PROCEDURES
Whenever the hydraulic system is drained in order to service a hydraulic component, the following start-up
procedure should be completed.
1. Check all nuts and bolts to be sure they are tight and that all lock washers are fully compressed.
2. Check all hoses and hydraulic connections to be sure that they are tight.
3. Inspect all moving parts, and make certain that no wires or hoses will be caught or pinched when the
tractor is in operation.
Secure all wires and hoses.
4. Thoroughly lubricate the VERSA PRO. Refer to Mnt-FL-0077, Section 5-3.
5. Change the hydraulic filter and fill the reservoir to the sight glass with new hydraulic oil. Refer to 2-5 for
specifications.
Remove all objects from, and stand clear of, the front of the cutter unit. DO NOT GET
NEAR ROTATING KNIVES!
6. Turn mowers off, then start tractor and run engine at low idle. Operate the cylinder, (turn cutter units on
ONLY when mowers are fully lowered). Operate until the system is fully charged. Recheck the fluid level
and add oil, if necessary. If undue noise continues after the system is fully charged, stop the unit and
determine the cause.
7. After the hydraulic system is fully charged and functioning properly, switch the mowers on and increase the
engine speed to run the 540 PTO speed. Maintain this speed for 5 minutes and look for any leaks or
possible problems.
HYDRAULIC PUMPS
The pump unit assembly is made up of the oil
reservoir, gearbox, and hydraulic pump. The pump
is driven by the Tractor PTO through a drive shaft.
Therefore, oil is being pumped whenever the PTO
is engaged. When the mower is off, oil is directed
to the reservoir by the solenoid motor control
valve and does not flow to the cutter motor.
Cooling is provided by patented in frame cooling
tubes in the wing mowers.