Steering/Lift/Sidewinder Circuit Testing − Gear Pump (P2) Flow Test - Toro Reelmaster 3100-D Service Manual

Steering/Lift/Sidewinder Circuit Testing − Gear Pump (P2) Flow
Test
g345084
Reelmaster ® 3100-D/3105-D
20252SL Rev A
Gear pump (P2) is designed to satisfy both steering cylinder and lift cylinder
needs simultaneously (at full speed throttle). The Gear Pump (P2) 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.
If unit steering is sluggish or otherwise performs poorly, see
Steering/Lift/Sidewinder Circuit Testing − Steering Control Valve and Steering
Cylinder Test (page 5–60).
If cutting unit lift operation is unsatisfactory, check lift control manifold solenoid
valves and/or lift cylinders. Additional information on these components is
available in this chapter.
If both steering and lift operations perform poorly, perform the gear pump (P2)
flow test and circuit relief valve pressure test (see
Testing − Relief Valve Pressure Test (page
Special Equipment Required:
•
Flow Meter with Pressure Gauge that has at least a 16 LPM (5 GPM) capacity
•
Phototach (non−contact tachometer)
1. Park the machine on a level surface with the cutting units lowered and PTO
switch in the disable position. The engine should be off and the parking
brake engaged.
2. Read Precautions for Hydraulic Testing (page
Figure 56
5–58)).
Page 5–55
Steering/Lift/Sidewinder Circuit
5–27).
Hydraulic System: Testing