Toro Reelmaster 4500–D Service Manual page 197

TEST NO. 6: Checking Steering Circuit Working Pressure or Relief Pressure
Procedure For Working Pressure Check:
1. Install a 5,000 psi gauge into the steering quick dis-
connect.
2. Operate the unit while monitoring the gauge.
RANGE OF TESTER READINGS 0 – 1300 PSI
3. If working pressure is too high or too low, perform re-
lief pressure check.
Procedure For Relief Pressure Check:
1. Hydraulic oil must be at operating temperature.
2. Install a 5,000 psi gauge into the steering quick dis-
connect.
3. Start the engine and move the throttle to full speed
(2500 rpm).
4. Turn the steering wheel until heavy resistance is felt
indicating that the cylinder has reached maximum
stroke.
5. Momentarily hold the steering wheel against the re-
sistance and read gauge.
TESTER READING TO BE APPROXIMATELY
1200 – 1300 PSI
6. If pressure is too high, clean and adjust relief valve in
steering pump by removing the required shims. If pres-
sure is too low, check for restriction in pump intake line.
Check the steering cylinder for internal leakage. If cylin-
der is not leaking, adjust the relief valve by adding the
required shims. If pressure is still too low, repair or re-
place steering pump.
Reelmaster 4500–D
Page 4 – 35
Figure 21
Hydraulic System