TEST NO. 7: Checking Lift Circuit Working Pressure or Relief Pressure
WORKING Pressure Check:
1. Make sure hydraulic oil is at normal operating tem-
pe
rature by operating machine for approximately 10
minutes.
2. Lower cutting units, engage parking brake and stop
th
e engine.
3. Raise seat to get access to hydraulic test fittings.
Remove access cover from in front of auxiliary pump.
4. Install a 5000 PSI gauge onto lift circuit quick discon-
nect fitting. Put gauge and hose through opening below
seat in front of auxiliary pump so gauge can be observed
Figure 18
while sitting on seat.
1. Lift circuit test port
5. Raise each cutting unit while monitoring gauge.
RANGE OF TESTER READINGS 300 - 1800 PSI
when counterbalance setting is 300 PSI.
NOTE: Changes in counterbalance setting will affect
th
e lift circuit relief pressure.
RELIEF Pressure Check:
6. With engine running at full speed, engage control
leve
r into the “LIFT” position.
7. Momentarily hold the lever in the engaged position
after full cylinder extension and read gauge.
TESTER READING TO BE APPROXIMATELY
18
00 PSI when counterbalance setting is 300 PSI.
NOTE: Changes in counterbalance setting will affect the
lift circuit relief pressure.
Testing P
age 4 - 30 Reelmaster
®
335-D
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