Toro Reelmaster 5510 Series, Service Manual

Page: 251 / 662

Testing the Steering Circuit–Gear Pump (P3) Flow (5610-D)
g216144
Figure 134
The gear pump (P3) is designed to satisfy the steering cylinder needs (at full
speed). The gear pump (P3) 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
16 L/minute (5 gallons/minute) capacity.
Test Procedure
1. Park the machine on a level surface with the reel speed switch off, lower the
cutting units, shut off the engine, and set the parking brake.
2. Read all Warning, Cautions, and precautions listed at the beginning of this
section.
Reelmaster ® 5410/5510/5610 Series Page 6–133 Hydraulic System: Testing the Hydraulic System
15216SL Rev C