Procedure for Reel Drive Motor Cross--Over Relief
Pressure Test
9. One person should sit on the seat and operate the
machine while another person closely monitors both
pressure gauges connected to the reel motor. Make
sure that engine speed is at low idle position (1200
RPM) and press PTO switch to ON. Move “Lower-Mow/
Raise” lever forward to engage the cutting units.
1.
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately 10 minutes.
2.
Determine which reel motor is malfunctioning.
10.There
should be a slight hesitation in pressure in-
crease on the inlet side of motor as the cross over relief
valve opens. Once the relief valve is open, there will be
a pressure differential between the gauges on the inlet
and outlet side of the motor. Note and record this pres-
sure difference which should be:
3.
lowered andPTOswitch off.Makesure engine is offand
mow/transport lever is in mow. Apply the parking brake.
Parkmachineonalevelsurfacewiththecuttingunits
4.
Read Precautions For Hydraulic Testing in this sec-
tion.
Pressure differential between the two gauges
should be approximately 1800 PSI (124 bar)
CAUTION
11.
Disengage the cutting units and stop the engine. If
the measured pressure differential is not approximately
PSI (124 bar), the cross-over relief valves on the
tested motor may be leaking or damaged. Inspect relief
valves in the reel motor (see Reel Motor Service in the
Service and Repairs section of this chapter).
1800
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.
12.After
testing is completed, make sure that engine is
stopped, then relieve cutting unithydraulic system pres-
sure (see Relieving Hydraulic System Pressure in the
General Information section of this chapter). Remove
pressuregaugesandteefittingsfrommachine.Connect
hydraulic hoses to reel motor fittings.
NOTE: The reel motors are connected in series. To iso-
late a faulty motor, all motors in the circuit may have to
be tested by starting with the upstream motor (closest to
the pump) first.
5.
On reel motor to be tested, thoroughly clean junction
13.If necessary, test other reel motors.
of motor inlet and outlet fittings and hydraulic hoses.
Loosen and remove both hoses from fittings. Install a
tee fitting with a 5000 PSI (350 bar) pressure gauge be-
tween fitting and hose for both motor inlet and outlet
(Fig. 39).
FRONT OF MACHINE
3
2
6.
On the hydraulic mow control manifold, set reel
speedcontrol tothefullspeed position.MakesureMow/
Backlap lever is in the “Mow” position.
7.
With cutting units in lowered position and engine
OFF, insert a block of wood between cutting unit reel
blades and carrier frame of cutting unit being tested to
prevent reel from turning (Fig. 38).
1
8.
Start engine and run at low idle speed. Check for any
hydraulic leakage from test connections and correct be-
fore proceeding with test.
Figure 39
1.
2.
Hydraulic reel motor
Reel motor inlet hose
3.
Reel motor outlet hose
CAUTION
Adjacent cutting unit reels will rotate when per-
forming the cross--over relief test. Keep away
from cutting units during test to prevent person-
alinjuryfromrotatingreelblades.Donotstandin
front of the machine.
Reelmaster 5010 Series
Page 4 -- 43 Rev. B
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Language | English |
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