Toro Groundsmaster 5900 Series Service Manual page 146

Procedure for Counterbalance Pressure Test (continued)
Hydraulic System: Testing
g287739
1. Steering/lift manifold
2. Test fitting (port G4)
4. Connect a 70 Bar (1000 PSI) pressure gauge to test fitting in port G4 on
steering/deck lift control manifold
5. After installing pressure gauge, start engine and run at low idle speed. Check
for hydraulic leakage at tester connections and correct before proceeding
with test.
6. Operate the engine at high idle speed (2530 RPM) with no load on the
system. Do not engage the cutting decks.
GAUGE READING TO BE: 21 to 29 bar (305 to 425 PSI).
7. Stop engine and record test results.
Note: If hydraulic oil is not at normal operating temperature or if traction
charge relief pressure is high, counterbalance pressure will be higher than
normal.
8. If necessary, adjust the counterbalance valve (RV3) so that counterbalance
pressure is correct (see
counterbalance valve (RV3) is located on the top of the steering/deck lift
manifold (Figure 54).
9. When counterbalance testing is complete, disconnect pressure gauge from
test fitting. Lower and secure hood.
3
2
Figure 54
3. Counterbalance valve
(Figure 54).
Adjust Manifold Relief Valves (page
Page 5–46
1
5–72)). The
Groundsmaster ® 5900 & 5910
16227SL Rev B