Testing The Steering Circuit - Charge Pump Flow - Toro ProLine H800 Service Manual

Testing the Steering Circuit - Charge Pump Flow

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Hydraulic System: Testing the Hydraulic System
The charge pump is designed to satisfy the steering cylinder needs (at full
speed). The charge pump flow test compares fluid flow at no load with fluid flow
under load. A drop in flow under load of more than 15% indicates the gears and
wear plates in the pump have worn. Continued operation with a worn pump can
generate excessive heat and cause damage to the seals and other components
in the hydraulic system.
Special Equipment Required:
•
Flow meter with pressure gauge that has at least a 19 LPM (5 GPM) capacity.
•
Phototach (non−contact tachometer).
Figure 57
Page 5–52 ProLine H800
19241SL Rev A