The PTO Pressure Valve Test should be performed if a
PTO engagement problem is identified. This test will de-
termine if the PTO pressure valve in the transmission is
operating correctly.
11.If specification is not met, repair or replace pressure
valve in transmission (see Transmission Service in the
Service and Repairs section of this chapter). Also con-
sider a worn or damaged charge pump in the transmis-
sion (traction charge circuit would be affected as well).
Procedure for PTO Pressure Valve Test:
12.Relieve
hydraulic system pressure (see Relieving
1.
perature.
Make sure hydraulic oil is at normal operating tem-
Hydraulic System Pressure in the General Information
section). Disconnect test gauge from pressure valve
test port. Install plug into port and torque plug from 14 to
15
ft–lb (18 to 21 N–m).
WARNING
Pressure Valve
Test Port
Before disconnecting or performing any work on
the hydraulic system, all pressure in the system
must be relieved. See Relieving Hydraulic System
Pressure in the General Information section.
2.
Park machine on a level surface with the cutting deck
(or implement) lowered and off. Make sure engine is off
and the parking brake is applied.
FRONT
3.
Read Precautions for Hydraulic Testing listed at the
beginning of this section.
4.
Thoroughly clean transmission area surrounding
pressure valve test port (Fig. 20).
Figure 20
5.
Remove plug from pressure valve test port (Fig. 20).
Connect hydraulic pressure gauge (1000 PSI / 70 bar)
with an attached hydraulic hose to the test port.
6.
Start engine and run at low idle speed (1500 to 1650
RPM). Check for any hydraulic leakage from test con-
nections and correct before proceeding with test.
7.
(3200
With engine running, move throttle to full speed
RPM).
CAUTION
Keep away from deck (or implement) during test
to prevent personal injury.
8.
Have operator engage PTO and monitor the pres-
sure gauge.
9.
With the engine running at full speed and PTO en-
gaged, pressure should be from 280 to 340 PSI (19.3 to
bar).
23.4
10.Disengage
results.
PTO and then stop engine. Record test
Groundsmaster 7200/7210
Page 4 – 35
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Document Type | Service Manual |
| Language | English |
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My mower is a TORO 7210.
Start fuse defection. Why ?