Toro Groundsmaster 5900 Series Service Manual page 162

Procedure for Lift/Lower Circuit Relief Pressure Test (continued)
Hydraulic System: Testing
12. If lift/lower relief pressure is too low, check for restriction in gear pump inlet
line or reservoir strainer. Also, check the lift cylinder for internal leakage. If
cylinder is not leaking, adjust the relief valve (RV2) so that relief pressure
is correct (see Adjust Manifold Relief Valves (page
(RV2) is located on the top of the steering/deck lift manifold
relief pressure remains too low after adjustment, the final gear pump section
or lift cylinder(s) should be suspected of wear, damage or inefficiency.
13. When testing is complete, disconnect pressure gauge from test fitting. Lower
and secure hood.
Page 5–62
5–72)). The relief valve
(Figure 67). If
Groundsmaster ® 5900 & 5910
16227SL Rev B