Mow Circuit Problems - Toro Greensmaster 3150 Service Manual

Mow Circuit Problems

Problem
Gear pump is noisy (cavitation).
Cutting reel motors will not turn.
Cutting reel speed is erratic.
Cutting reel speed is low.
Greensmaster 3150
Possible Cause
Hydraulic reservoir oil level is low (other hydraulic circuits affected
as well).
Hydraulic pump suction line is restricted.
Hydraulic pump suction line has an air leak.
Hydraulic manifold solenoid valve S1R1 is stuck open (not shifting
to its energized position).
An electrical problem exists (see Chapter 5 -- Electrical System).
FC1 logic valve in control manifold is stuck open.
PRV valve in control manifold is stuck closed.
Pilot piston in control manifold is stuck or damaged.
Front section of gear pump is damaged (see Gear Pump (Front
Section) Flow Test in the Testing section of this chapter).
A cutting unit problem exists (see Chapter 7 -- DPA Cutting Units).
Hydraulic manifold reel circuit cartridge is leaking or damaged.
Hydraulic manifold orifice (OR1 or OR2) is plugged.
A cutting unit problem exists (see Chapter 7 -- DPA Cutting Units).
Hydraulic manifold reel circuit cartridge is leaking or damaged.
Excessive internal wear in reel motor exists (see Reel Motor Case
Drain Flow Test in the Testing section of this chapter).
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