Toro TX525 - Page 542

HYDRAULIC TESTING
9-9TX525 Service Manual Rev. 000
10. Thread the hydraulic pump hose previously removed
from the pump tting onto the adaptor on the ow
meter hose. Tighten the hose using a 15/16” wrench
and 7/8” wrench on the adaptor tting (Fig. 1855).
Fig 1855 PICT-3406
11. Using a 7/8” wrench, tighten both hoses to the ow
gauge (Fig. 1856).
Fig 1856 PICT-3407
12. Start the engine and run at full rpm.
13. Take the ow reading from the gauge (Fig. 1857).
Fig 1857 PICT-3408
14. With no restriction, the ow specication is 5.5 gpm
(20.8 lpm).
15. Slowly turn the restrictor on the ow meter to
simulate a hydraulic load on the circuit.
Note: Watchtheowgpmastheloadincreases
(psi increases), the engine rpm and gpm
should slowly decrease as load increases (psi
increases).Ifasuddendropinowresults,
the pump should be replaced. Do not increase
the load (psi) beyond 2400 + 50 psi (165 + 3.4
bar).
16. Slowly turn restrictor out until the psi on the gauge
reads zero. Shut the engine off.