Testing The Mow Circuit-Relief Valve (Prv1) And (Prv2) Pressure - Toro Groundsmaster 4300-D Service Manual

Testing the Mow Circuit–Relief Valve (PRV1) and (PRV2) Pressure
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Groundsmaster ® 4300-D
16226SL Rev C
Test the performance of the deck control manifold proportional relief valves
(PRV1) and (PRV2) to ensure that the maximum amount of fluid is available to
the cutting deck motors up to the set relief pressure. This test also ensures that
pump (P1) or (P2) are capable of generating enough pressure to open properly
functioning proportional relief valves.
Note: The front cutting deck circuit is supplied by pump (P2) and is protected by
a proportional relief valve (PRV2) in the deck control manifold. The rear cutting
deck circuit is supplied by pump (P1) and is protected by proportional relief valve
(PRV1); refer to the Hydraulic Flow Diagrams (page
Special Equipment Required: Flow meter with pressure gauge that has at least a
56.8 L/minute (15 gallons/minute) capacity.
Figure 65
Page 4–65 Hydraulic System: Testing the Hydraulic System
4–16).