Alamo HYDRO 15 - Manual (Page 104)

HYDRO 15 (Service Manual) 10/06
© 2006 Alamo Industrial
Section 5 - 30
OPTIONAL AXLE LEVEL LIFT CYLINDER REPAIR
Cylinder Connections on Mower: (Axle Level Lift Cylinders, Optional)
1. The re-phasing cylinders are connected together starting with the largest and going to the
smallest (10 ft model will not use a 3” bore cylinder). These cylinders MUST be connected in this
order. The cylinders will need to be purged of all air, this can be done by powering cylinder to the
full extend position and hold them there until the oil flows through the first cyl to the second cyl,
second cyl to the third cyl and third cyl back to the optional remote control valve or tractor reservoir.
These cylinder do not work well as a double action system by connecting the return into the
tractor remote return. If connected this way they will work but tend ti get air in them as used over
a period of time and may require the air to be purged from system ocasionally., if wings cylinders
start to droop chances are they have air in them and need to be purged. Cylinder work best when
return to where return line has a constant supply of non-pressere hydraulic oil to allow the cylinder
to draw the oil back into the cylinder as the cylinder is collapsed. The return side of the remote three
spool valve work very well for this.
If phasing cylinder will not work, check that the cylinders are connected in the correct series
(hose routing) according to cylinder bore diameter. Make certain the cylinder were re-assembled
correctly with the machined groove in the ID of barrel at the rod end of cylinder, this can be checked
by pulling the return line loose and putting it into a clean bucket to catch the oil, run the cylinder all
the way to the top. Always keep control of hoses during testing to keep them in something to prevent
the oil form spraying.
DO NOT test if oil is excessively hot, if you cannot touch the hoses, the oil is
to hot. Oil will come out of hose when cylinder is until cylinder is fully extended and keep coming
out as long as the control valve is open.
Hydraulic Pressure
Flow Direction
12
12
12
12
12
12
12
12
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12
12
12
12
12
12
12
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12
12
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12
12
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12
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12
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12
12
12
12
12
12
Center Level Lift
Cylinder 3-1/2” Bore
RH Wing Level Lift
Cylinder 3-1/4” Bore
LH Wing Level Lift
Cylinder 3” Bore
From Remote Valve
or
Tractor Remote
Return To Remote
Valve Return Line
or
Tractor Reservoir
Figure 10