Toro Groundsmaster 360 Service Manual page 83

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.
Procedure for PTO Pressure Valve Test:
1. Make sure hydraulic oil is at normal operating tem-
perature.
WARNING
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
lowered and off. Make sure engine is off and the parking
brake is engaged.
3. Read Precautions for Hydraulic Testing listed at the
beginning of this section.
4. Thoroughly clean transmission area surrounding
pressure valve test port (Fig. 35).
NOTE: If machine is equipped with optional speed re-
duction kit, a hydraulic fitting and hose for the kit is con-
nected to the transmission pressure valve test port. To
perform the PTO pressure valve test, disconnect hy-
draulic hose and remove fitting from transmission port.
Install cap in speed reduction kit hose. Then, install
pressure gauge and proceed with remaining steps of
test. When PTO pressure valve testing is completed, re-
install fitting to transmission port, remove cap from hy-
draulic hose and connect hose to fitting.
5. Remove plug from pressure valve test port (Fig. 35).
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 (1300 RPM).
Check for any hydraulic leakage from test connections
and correct before proceeding with test.
Groundsmaster 360
7. With engine running, move throttle to full speed
(3100 to 3150 RPM).
Keep away from deck during test to prevent per-
sonal 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
23.4 bar).
10.Disengage PTO and then stop engine. Record test
results.
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).
12.Relieve hydraulic system pressure (see Relieving
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).
Pressure Valve
Test Port
FRONT
Page 4 - - 49
CAUTION
Figure 35
Hydraulic System