Procedure for Gear Pump (P1) Flow Test:
IMPORTANT: In this test, the hydraulic tester is
positioned before the manifold relief valve. Pump
damage can occur if the oil flow is fully restricted by
fully closing the tester flow control valve. Do not
close tester valve fully when performing test.
NOTE: Over a period of time, the gears and wear plates
in the pump can wear down. A worn pump will by pass
oil and make the pump less efficient. Eventually, enough
oil loss will occur to cause the reel motors to stall under
heavy cutting conditions. Continued operation with a
worn, inefficient pump can generate excessive heat and
cause damage to the seals and other components in the
hydraulic system.
9. Watch pressure gauge carefully while slowly closing
the flow control valve until 2000 PSI is obtained. Verify
with a phototac that the pump speed is 3100 RPM.
10.Flow
indication should be 5.7 GPM minimum.
1.
perature by operating the machine for approximately 10
minutes.
Make sure hydraulic oil is at normal operating tem-
11.
Shut off engine.
12.Disconnect
tester from gear pump fitting and hose.
Reconnect hose to the pump.
2.
Park machine on a level surface with the cutting units
lowered and off. Make sure engine is off and the parking
brake is engaged.
13.If
flow was less than 5.7 GPM or a pressure of 2000
PSI cannot be obtained, check for restriction in the pump
intake line. If line is not restricted, remove pump and re-
pair or replace as necessary.
3.
Read Precautions for Hydraulic Testing.
WARNING
2
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.
1
4.
Disconnect hose connection on the reel gear pump
leading to port (P1) on the hydraulic manifold.
5.
Install tester in series with reel drive pump and the
disconnected hose leading to port (P1) of the hydraulic
manifold.
RIGHT
FRONT
6.
Make sure backlap knob on the hydraulic manifold is
in the mow position and reel speed is set to maximum.
7.
open.
Make sure the flow control valve on the tester is fully
Figure 24
1.
Gear pump
2. To manifold port (P1)
8.
50
Start engine and move throttle to full speed (2650 +
RPM). Do not engage the cutting units.
Reelmaster 3100−D
Hydraulic System (Rev. C)
Page 4 − 43
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