Toro 04470 Service Manual

Greensmaster 3250--DHydraulic System Page 4 -- 26
Lift/Lower Circuit Problems
Problem Possible Cause
Cutting units will not lift or lift slowly. Engine speed is too low.
Oil level in reservoir is low (other hydraulic circuits affected as well).
Lift cylinder linkage is binding or broken.
Lift cylinder bushings bind.
Charge circuit pressure is low ( seeChargeReliefValvePressure
Test).
Implement relief valve is leaking or damaged (see Implement Relief
Valve Pressure Test).
Solenoid valve (S2) in hydraulic manifold is leaking or damaged.
Relief valve (R2) is stuck, leaking or damaged (see Lower Cutting
Units Relief Valve (R2) Pressure Test).
Lift cylinders leak internally.
Spoolinsteeringvalveishungup(seeSteeringValveTest).
Gear pump (rear section) is worn or damaged (see Gear Pump
(Rear Section) Flow Test).
Cutting units raise, but will not stay
up.
Hydraulic manifold solenoid valve (S4) leaks.
Lift cylinders leak internally.

Toro 04470 Specifications

General

Brand	Toro
Model	04470
Category	Lawn Mower
Language	English