Procedure for Lift and Steering Control Valve Relief
Pressure Test:
2
1.
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
2.
Make sure machine is parked on a level surface with
the cutting units lowered and off. Make sure engine is off
and the parking brake is engaged.
1
3.
Read Precautions for Hydraulic Testing.
RIGHT
WARNING
FRONT
Before disconnecting or performing any work
on the hydraulic system, all pressure in the
system must be relieved. See Relieving Hy-
draulic System Pressure in the General Infor-
mation section.
Figure 32
2.
1.
Gear pump
To steering control valve
4.
Disconnect hose connection on gear pump (P2)
leading to the steering control valve (Fig.32).
5.
Install T−connector with test gauge in series with the
discharge of the gear pump and the disconnected hose
leading to the steering control valve.
6.
Make sure steering wheel is positioned so the rear
wheel points directly ahead.
7.
50
Start engine and move throttle to full speed (2650 +
RPM). Engage the cutting units.
CAUTION
Do not allow pressure to exceed 1500 PSI.
IMPORTANT: Hold steering wheel at full lock only
long enough to get a system pressure reading.
Holding the steering wheel against the stop for an
extended period will damage the steering control
valve.
8.
Watch pressure gauge carefully while turning the
steering wheel completely in one direction and holding
at full lock briefly.
9.
System pressure should be from 845 to 995 PSI as
the relief valve lifts. Return steering wheel to the center
position. If specification is not met, shut off engine and
replace relief valve in steering control valve (see Steer-
ing Control Valve Service).
10.Disconnect
T−connector with test gauge from gear
pump (P2) fitting and hose. Reconnect hydraulic hose
to pump.
Reelmaster 3100−D
Hydraulic System (Rev. C)
Page 4 − 53
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