Procedure for Charge Pump Flow Test:
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
3. Operate engine at full speed (3200 + 50 RPM).
1.
4. Watch pressure gauge carefully. Make sure lift lever
is in the neutral position. Record the pressure.
5.
While holding the lift lever in the raised position,
2.
lowered. Make sure engine is off and the parking brake
is engaged.
Park machine on a level surface with the cutting units
watch the pressure gauge. Record pressure when the
relief valve opens.
6.
7.
Return lift lever to neutral position. Shut off engine.
Subtract the relief valve closed pressure from the re-
3.
Read Precautions For Hydraulic Testing.
lief valve open pressure (see example below). The dif-
CAUTION
ference should be from 450 to 500 PSI.
A. If this specification is not met, adjust lift relief
valve.
Operate all hydraulic controls to relieve system
pressure and avoid injury from pressurized hy-
draulic oil.
B. If this specification is met, go to step 9.
Example Calculation
PRESSURE
620
4.
Disconnect outside top hose from the discharge fit-
ting of the charge pump (Fig. 21). Connect gauge end
of flow tester with pressure gauges to the pump dis-
charge fitting.
Relief Valve Open (Lever raised)
Relief Valve Closed (Lever in neutral)
150
5.
nected hose.
Connect the other end of the tester to the discon-
Open less Closed Pressure
(450 to 500 PSI)
470
NOTE: Do not remove lift relief valve from the hydraulic
manifold for adjustment.
CAUTION
8.
Adjust the lift relief valve pressure as follows:
A. Remove the cap from the relief valve.
Make sure that all hoses are free of the flywheel
after tester installation.
B. To increase the relief valve pressure setting, use
an allen wrench and turn adjustment socket clock-
wise. A 1/8 turn on the socket will make a measur-
able change in relief pressure.
6.
tral and the parking brake is engaged.
Make sure that traction pedal and lift valve are in neu-
7. Start and operate engine at full speed (3200 + 50
RPM).
C. To decrease the relief valve pressure setting, use
an allen wrench and turn adjustment socket counter-
clockwise. A 1/8 turn on the socket will make a mea-
surable change in relief pressure.
8.
slowly closing the flow control valve until pressure
gauge reads 500 PSI.
Watch flow and pressure gauges carefully while
D. Repeat steps 1 through 8 above until the relief
valve pressure setting is correct. Reinstall cap on re-
lief valve when valve is set properly.
9.
specification is not met, repair or replace charge pump.
Minimum flow gauge reading should be 2.5 GPM. If
Procedure for Lift Relief Pressure Check:
E. If the relief valve pressure setting can not be ad-
justed to specification, go to step 9 and replace the
relief valve.
CAUTION
NOTE: If the pressure and flow are within specification
but the cutting units do not lift or lift slowly, check for me-
chanical binding or internal leakage of the lift cylinder.
Do not allow charge pressure to exceed 650 PSI.
1.
2.
Fully open control valve on the tester.
9.
nect hose to the pump.
Disconnect tester from the pump and hose. Recon-
Make sure hydraulic oil is at operating temperature.
Reelmaster 2000–D
Page 4 – 27
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Reelmaster 2000-D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
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| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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