Toro Reelmaster 5010- H Service Manual page 81

The gear pump section (P1) flow test should be per-
formed to make sure that the cutting unit lift circuit has
adequate hydraulic flow.
Procedure for Gear Pump (P1) Flow Test
1. Park machine on a level surface with the cutting units
lowered and disengaged. Make sure engine is off. Apply
the parking brake.
2. Read Precautions For Hydraulic Testing in this sec-
tion.
CAUTION
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
3. Raise and prop operator seat to allow access to hy-
draulic pump assembly.
4. Thoroughly clean junction of hydraulic hose and tee
st
fitting on left side of 1 gear pump section (Fig. 42). Dis-
connect hose from left side pump fitting.
IMPORTANT: Make sure that the oil flow indicator
arrow on the flow meter is showing that the oil will
st
flow from the 1 pump section (P1), through the
tester and to the hydraulic hose.
5. Install tester with pressure gauge and flow meter be-
tween gear pump fitting and disconnected hose to allow
flow from gear pump section to tester. Connect tester in-
let hose to the pump fitting. Connect the tester outlet
hose to the disconnected hydraulic hose. Make sure
the flow control valve on tester is fully open.
6. Make sure that the traction pedal is in neutral and the
parking brake is engaged.
7. Start engine and run at idle speed. Check for any hy-
draulic leakage from test connections and correct be-
fore proceeding with test.
8. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes.
9. Increase engine speed to high idle speed (3000
RPM). Use the InfoCenter Display to verify that engine
speed is correct.
Reelmaster 5010- H
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 gauge on tester,
slowly close the tester flow control valve until 1000 PSI
(69 bar) is obtained on gauge. Make sure that engine
speed is still correct.
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. Once the gear pump flow has been determined,
open the tester flow control valve, stop engine and re-
cord 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 gear pump problem exists. Check for restriction in
gear pump suction hose. If intake is not restricted, re-
move gear pump and repair or replace pump as neces-
sary (see Hydraulic Pump Assembly and Gear Pump
Service in the Service and Repairs section of this chap-
ter).
NOTE: If the flow from the 1
is low, the operation of all lift cylinders will be affected.
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). Disconnect tester
from gear pump tee fitting and hydraulic hose. Recon-
nect machine hose to pump fitting.
14.Lower and secure operator seat.
1
st
1. 1 gear pump section
Page 4 - 45
st
gear pump section (P1)
2
Figure 42
2. Hydraulic hose
Hydraulic System