Toro Groundsmaster 5900 Series Service Manual page 164

Procedure for Steering Circuit Relief Pressure Test (continued)
Hydraulic System: Testing
3
g287791
1. Steering/lift manifold
2. Test fitting (port G1)
5. Connect a 350 Bar (5000 PSI) pressure gauge with hydraulic hose attached
to test fitting in port G1 on steering/ deck lift manifold
gauge hose to allow operator to view the gauge.
6. After installing pressure gauge, start engine and run at idle speed. Check for
hydraulic leakage at test connection and correct before proceeding with test.
7. Operate the engine at high idle speed (2530 RPM).
Hold steering wheel at full lock only long enough to get a system
pressure reading. Holding the steering wheel against the stop for an
extended period may damage steering components.
8. Turn steering wheel all the way in one direction and momentarily hold the
steering wheel against resistance.
GAUGE READING TO BE: 151 to 155 bar (2200 to 2250 PSI).
9. Release steering wheel, stop engine and record test results.
Note: If steering relief pressure is incorrect and lift/lower problems also exist,
the final gear pump section should be suspected of wear and inefficiency.
If steering wheel continues to turn at end of cylinder travel (with lower than
normal effort), the steering cylinders or steering control valve should be
suspected of wear or damage.
10. If relief pressure specification is not met, adjust relief valve (RV1) in
steering/deck lift manifold
Adjust Manifold Relief Valves (page
11. When testing is complete, disconnect pressure gauge from manifold test
fitting. Lower and secure hood.
2
Figure 69
3. Relief valve RV1
IMPORTANT
(Figure 69) so that relief pressure is correct (see
5–72)).
Page 5–64
1
(Figure 69). Route
Groundsmaster ® 5900 & 5910
16227SL Rev B