Toro Reelmaster 5010- H Service Manual page 69

NOTE: If machine is
TM
CrossTrax AWD, reverse relief pressure test ports
TM
are located on CrossTrax
3. Thoroughly clean traction circuit test port on hydrau-
lic tube for direction to be checked (Fig. 27). Connect a
5000 PSI (350 bar) pressure gauge to test port.
4. After installing tester, start engine and run at low idle
speed. Check for any hydraulic leakage from test con-
nections and correct before proceeding with test.
5. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes.
6. Sit on seat and increase engine speed to high idle
speed (3000 RPM).
7. Apply brakes and slowly depress the traction pedal
in the direction to be tested (forward or reverse). While
pushing traction pedal down, carefully watch the pres-
sure gauge needle. As the traction relief valve lifts, the
gauge needle will momentarily stop. Traction system
pressure as the relief valve opens should be:
Approximately 3625 PSI (250 bar) in both forward
(R3) and reverse (R4)
NOTE: If traction pedal continues to be pressed after
the relief valve has opened, system pressure may in-
crease higher than relief pressure.
8. When relief pressure has been identified, release
traction pedal, stop engine and record test results.
NOTE: Forward (R3) and reverse (R4) relief valves are
identical. Relief valves can be switched in piston (trac-
tion) pump to help in identifying a faulty relief valve.
9. If traction pressure problem occurs in one direction
only, interchange the relief valves in the piston (traction)
pump (Fig. 28) to see if the problem changes to the other
direction. Clean or replace valves as necessary. These
cartridge type valves are factory set, and are not adjust-
able. If traction relief pressure is low and relief valves are
in good condition, piston (traction) pump and/or wheel
motors should be suspected of wear and inefficiency.
10.After testing is completed, make sure that engine is
stopped and then relieve hydraulic system pressure
(See Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter). Remove pres-
sure gauge from machine and install dust cap to test
port.
Reelmaster 5010- H
equipped with optional
hydraulic manifold.
Page 4 - 33
1
RIGHT
FRONT
Figure 27
1. RH wheel motor
2. LH wheel motor
3
RIGHT
FRONT
Figure 28
1. Piston (traction) pump
2. Reverse relief valve (R4)
2WD MACHINE SHOWN
4
3
2
3. Forward test port
4. Reverse test port
1
2
3. Forward relief valve (R3)
Hydraulic System