Toro Groundsmaster 3280-D Service Manual page 144

Test Procedure (continued)
Hydraulic System: Testing the Hydraulic System
3. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
4. Raise and support the operator seat, remove the seat plate to get access to
the hydraulic pump assembly.
5. Ensure that the traction pedal is in the N
is stationary and parking brake is set.
g226949
1. 90° hydraulic fitting
6. Clean the fitting and hydraulic tube
from the fitting. Install a tee fitting with a 35,000 kPa (5,000 psi) pressure
gauge between the fitting and disconnected tube.
7. Attach a heavy chain to the rear of the machine frame and an immovable
object to prevent the machine from moving during testing.
8. Block the wheels with chocks to prevent the wheel rotation during testing.
9. Start the engine and move the throttle to full speed (3,100 to 3,250 rpm)
position. Use a tachometer to check that the engine speed is correct.
10. Record the reading on the charge circuit pressure gauge. The charge
pressure (without load) should read 345 to 483 kPa (50 to 70 psi). If the
charge relief pressure specification is not met, consider the following:
A. The hydraulic pump charge relief valve is damaged. Repair or replace
the hydraulic pump charge relief valve; refer to
Pump (Machine Serial Number above 316000000) (page
11. Sit in the operator's seat, release the parking brake, and slowly press the
traction pedal forward until 8,963 to 13,100 kPa (1,300 to 1,900 psi) is
reached on the traction circuit pressure gauge.
EUTRAL
Figure 68
2. Hydraulic tube
(Figure
Page 5–60
position, the steering wheel
68). Loosen and remove the tube
Servicing the Hydraulic
5–103).
Groundsmaster
05138SL Rev B
® 3280-D/3320