Adjust Implement Relief Valve (R5) (Machine Serial Number Under 220999999)
For machines with serial number under 220999999, the
implement (lift/steering) relief valve (R5) (Figure 26) is
adjustable. Note: The implement relief valve (R5) for
machines with serial number over 230000000 is incor-
porated into the steering control valve and is not adjust-
able.
WARNING
CAP
Never adjust the relief valve with the hydraulic
system pressurized. Hydraulic oil will spray out
of the valve with the cap off. Personal injury may
result. Always install the cap and tighten before
pressurizing the system.
1.
2.
Locate relief valve and remove cap from valve.
To increase pressure setting, turn the adjustment
socket inside the valve 1/8 of a turn clockwise.
ADJUSTMENT
HEX SOCKET
3.
socket inside the valve 1/8 of a turn counterclockwise.
To decrease pressure setting, turn the adjustment
4.
Installandtightencaptovalve.Afteradjustment,re-
test pressure setting (see TESTING).
Figure 26
Adjust Manifold Relief Valves (R1 and R2)
These relief valves are installed on the hydraulic man-
ifold. Relief valve (R1) is in the mow circuit and relief
valve (R2) is the lower cutting units relief.
WARNING
CAP
Never adjust the relief valve with the hydraulic
system pressurized. Hydraulic oil may spray out
of the valve with the cap off. Personal injury may
result. Always install the cap and tighten before
pressurizing the system.
1.
Locate relief valve and remove cap from valve.
An 1/8--turn of the adjustment socket is about
ADJUSTMENT
HEX SOCKET
Note:
50
psi (3.5 bar), or 1 turn is about 400 psi (27.6 bar).
2.
To increase pressure setting, turn the adjustment
socket inside the valve 1/8 of a turn clockwise.
Figure 27
3.
To decrease pressure setting, turn the adjustment
socket inside the valve 1/8 of a turn counterclockwise.
4.
Installandtightencaptovalve.Afteradjustment,re-
test pressure setting (see TESTING).
Hydraulic System (Rev. I)
Page 4 -- 54
Greensmaster 3250--D
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