Adjustments
Adjustable Pressure Valve
1
The mow/transport and lift control manifolds include ad-
justable pressure valves. An adjustment may be re-
quired to these valves if testing determines that the
circuitpressure settingisincorrect (seeTESTING inthis
chapter). Use the following process if an adjustment is
required:
2
NOTE: Do not remove the valve from the hydraulic
manifold for adjustment.
IMPORTANT: Donotremovecapfromvalveormake
valveadjustmentwhenengineisrunning.Hydraulic
oil under pressure may be ejected from valve with-
out cap in place.
3
1.
from hydraulic valve with an allen wrench.
Make sure that engine is not running. Remove cap
2.
To increase pressure setting, turn the adjustment
socket on the valve in a clockwise direction. A 1/8 turn
on the socket will make a measurable change in pres-
sure.
Figure 44
1.
2.
Hydraulic valve
Valve cap
3.
Adjustment socket
3.
To decrease pressure setting, turn the adjustment
socket on the valve in a counterclockwise direction. A
turn on the socket will make a measurable change
in pressure.
1/8
4.
Install cap on valve.
5.
Recheck valve pressure using correct test proce-
dure and readjust if needed.
Hydraulic System
Page 4 -- 60
Groundsmaster 5900/5910
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