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Reelmaster 7000 Hydraulic SystemPage 4 -- 67
The gear pump P4 flow test should be performed to
make sure that the engine cooling fan circuit has ade-
quate hydraulic flow.
NOTE: Gear Pump P4 supplies oil flow for the engine
cooling fan circuit.
Procedure for Gear Pump P4 Flow Test
1. Make sure hydraulic oil is at normal operating tem-
peraturebyoperatingthemachineforapproximatelyten
(10) minutes. Make sure the hydraulic tank is full.
2. Parkmachine onalevel surfacewith thecuttingunits
lowered and off. Make sure engine is offand the parking
brake is engaged.
3. Raise hood to allow access to pump assembly.
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
4. Thoroughly clean junction of hydraulic hose and fit-
ting in gear pump section P4 (Fig. 48). Disconnect hy-
draulic hose from fitting.
IMPORTANT: Make sure that the oil flow indicator
arrow on the tester is showing that the oil will flow
from the gear pump fitting, through the tester and
into the disconnected hose.
5. Install tester with pressure gauge and flow meter in
series with the disconnected hose and fitting in gear
pump sectionP4. Make surethe flow controlvalve on
the tester is fully open.
6. After installing tester, start engine and run at idle
speed. Check for hydraulic leakage and correct before
proceeding with test.
7. Move throttle to full speed (2850 RPM). DO NOT en-
gage the cutting units.
IMPORTANT: The gear pump is a positive displace-
ment type. If pump flow is completely restricted or
stopped, damage to the pump, tester or other com-
ponents could occur.
8. While watching pressure gauge on tester, slowly
close flow control valve on tester until 1000 PSI (69bar)
is obtained on pressure gauge. Verify engine speed
continues to be correct (2850 RPM).
9. For a pump in good condition, flow indication should
be approximately 6.5 GPM (24.6 LPM).
10.Fully open flow control valve on tester and then shut
engine off. Record test results.
11.If the flow islower than 5.8GPM(22LPM)or a pres-
sure of 1000 PSI (69 bar) could not be obtained, check
for restriction in pump intake line. If intake line is not re-
stricted, remove gear pump and repair or replace as
necessary.
12.After testing is complete, disconnect tester from hy-
draulic hose and fitting. Connect hoseto the gear pump
fitting. Lower and secure hood.
1. Gear pump 2. Pump section P4 hose
Figure 48
2
1
FRONT
RIGHT
Hydraulic
System