Toro Reelmaster 5510 Series, Service Manual

Page: 179 / 662

Test Procedure (continued)
5. Ensure that the hydraulic fluid is at normal operating temperature by
operating the machine under load for approximately 10 minutes.
6. Sit on seat and increase engine speed to high idle speed.
7. Apply brakes and slowly press the traction pedal in the direction to be tested
(forward or reverse). While pushing traction pedal down, carefully watch the
pressure 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
25,000 kPa (3,625 psi) in both forward (R3) and
reverse (R4).
Note: If traction pedal continues to be pressed after the relief valve has
opened, system pressure may increase higher than relief pressure.
8. When relief pressure has been identified, release traction pedal, shut off
the engine, and record test results.
Note: Forward (R3) and reverse (R4) relief valves are identical. Relief valves
can be switched in piston (traction) pump to help in identifying a damaged
relief valve.
g230035
Figure 83
1. Piston (traction) pump 2. Reverse relief valve (R4) 3. Forward relief valve (R3)
9. If traction pressure problem occurs in 1 direction only, interchange the relief
valves in the piston (traction) pump ( Figure 83 ) 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 adjustable. 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, ensure that the engine is shut off and then relieve
hydraulic system pressure; refer to Releasing Pressure from the Hydraulic
System (page 6–8) . Remove pressure gauge from machine and install dust
cap to test port.
Reelmaster ® 5410/5510/5610 Series Page 6–61 Hydraulic System: Testing the Hydraulic System
15216SL Rev C