Counterbalance Pressure - Toro Groundsmaster 580-D Service Manual

TEST NO. 5: Counterbalance Pressure
IMPORTANT: To prevent damage to test gauge,
raise all decks before connecting 1,000 psi gauge to
LIFT test port.
NOTE: Hydraulic oil must be at operating temperature
for these tests or pressure reading will be too high.
COUNTERBALANCE Pressure Test
1. Connect a 1,000 psi gauge to the LIFT test port.
a. On machines with serial number below
250000000, the LIFT test port is located on the out-
side of the control console (Fig. 13).
b. On machines with serial number above
250000000, the LIFT test port is located underneath
the center of the machine (Fig. 14).
2. Start the engine and adjust throttle so engine speed
is 2,500 RPM.
TESTER READING TO BE:
400 to 425 PSI (S/N below 250000000).
525 to 550 PSI (S/N above 250000000).
3. If pressure is incorrect, locate counterbalance relief
cartridge on control manifold (Fig. 15). Remove cap on
counterbalance relief valve and adjust the relief valve
screw until correct counterbalance pressure is attained.
"TRACTION PLUS" COUNTERBALANCE Pressure
Test
1. Connect a 1,000 psi gauge to the LIFT test port.
a. On machines with serial number below
250000000, the LIFT test port is located on the out-
side of the control console (Fig. 13).
b. On machines with serial number above
250000000, the LIFT test port is located underneath
the center of the machine (Fig. 14).
2. Start the engine and adjust throttle so engine speed
is 2,500 RPM. Move GROUND SPEED switch to HIGH
RANGE.
3. Engage service brake, momentarily push traction
pedal in the FORWARD direction and read the gauge.
TESTER READING TO BE:
600 to 650 PSI (S/N below 250000000).
725 to 775 PSI (S/N above 250000000).
4. If pressure is incorrect, locate "Traction Plus" relief
cartridge on control manifold (Fig. 15). Remove cap on
"Traction Plus" relief valve and adjust the relief valve
screw until correct "Traction Plus" pressure is attained.
Testing
1
NOTE: Deck drive Test Ports
on older models are
also on this panel.
1. Lift test port (S/N below 250000000)
2. Traction forward test port
1. Lift test port (S/N above 250000000)
1
1. Traction forward test port (S/N above 250000000)
Rev. F
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Figure 13
1
Figure 14
Figure 14A
Groundsmaster 580--D