4.
draulic pump.
Raise and prop operator seat to allow access to hy-
13.After testing is completed, make sure that engine is
stopped, then relieve hydraulic system pressure (See
Relieving Hydraulic System Pressure in the General In-
formation section of this chapter). Connect removed hy-
draulic tube to gear pump (P4) outlet and lift control
manifold P4 port.
5.
Thoroughly clean both ends of the hydraulic tube
that connects gear pump (P4) outlet (Fig. 42) and lift
control manifold P4 port. Remove hydraulic tube. Ac-
cess to hydraulic tube at lift control manifold can be ob-
tained from below the machine.
14.Lower and secure operator seat.
IMPORTANT: Make sure that the oil flow indicator
arrow on the flow meter is showing that the oil will
flow from pump (P4), through the tester and to the
lift control manifold.
1
6.
Install tester with pressure gauges and flow meter in
place of the removed hydraulic tube. Connect tester in-
let hose to the pump fitting. Connect the tester outlet
hose to the lift control manifold fitting. Make sure the
flow control valve on tester is fully open.
2
7.
Make sure thatthetraction pedalis inneutral andthe
parking brake is engaged.
Figure 42
8.
Start engine and run at idle speed. Check for any hy-
draulic leakage from test connections and correct be-
fore proceeding with test.
1.
Gear Pump (P4)
2.
Hydraulic tube
9.
tachometer to verify that engine speed is correct.
Move throttle to full speed (3200 RPM). Use a
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.
10.While
carefully watching pressure gauges, slowly
closethetesterflowcontrolvalveuntil1000PSI(69bar)
is obtained on gauge.
FLOW TESTER READING TO BE: A pump in good
condition should have a flow of approximately 3
GPM (11.4 LPM) at 1000 PSI (69 bar).
11.
Open the tester flow control valve, stop engine and
record test results.
12.If
flow is less than 2.5 GPM (9.6 LPM) or a pressure
of 1000 PSI (69 bar) cannot be obtained, consider that
a pump problem exists. Check for restriction in pump in-
take line. If intake is not restricted, remove gear pump
and repair or replace pump as necessary (see Gear
Pump in the Service and Repairs section of this chap-
ter).
NOTE: Iftheflowfromgearpump(P4)islow,theopera-
tion of all lift cylinders will be affected.
Reelmaster 5010 Series
Page 4 -- 47
Hydraulic System
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