Toro TX525 - Hydraulic System

2-3TX525 Service Manual Rev. 000
SPECIFICATIONS
Item Specication
Gear Pump A two-section tandem gear pump powers the loader and auxiliary hydraulic systems.
Section 1 (Auxiliary): 13.8 gpm @ 3600 rpm (52.2 liter/min)
Section 2 (Loader): 6.0 gpm @ 3600 rpm (22.7 liter/min)
Loader Valve A two-spool monoblock valve controls loader functions via a single lever joystick.
Main Relief Setting: 2400 psi (165.5 bar)
Loader Spool: A 4-position spool with closed, raise, lower, and oat positions
controls loader functions.
Tilt Spool: A 3-position spool with 3000 psi (206.8 bar) work port relief controls
the dump/curl cylinder functions.
Auxiliary Valve A single spool valve controls the auxiliary ow to the TX attachments. The valve is actuated
by single-step motion lever for forward and reverse-detent positions.
Main Relief Setting: 3000 psi (206.8 bar)
Hydrostatic Pumps The traction circuit is powered by dual hydrostatic pumps in a closed loop system. The
hydrostatic pumps are belt driven off of the auxiliary drive shaft on the front of the engine.
The circuit charge pressure is supplied by a 5 psi (.34 bar) check valve in the loader pump
return circuit. The pumps have service bypass valves for towing and have shock valves to
limit circuit pressure spikes. The pumps are mechanically actuated by the TX traction control
system.
Pump Displacement: 1.28 in
3
/rev (3.25cm
3
/rev)
Pump Speed: 3050 rpm through pulley reduction @ 3600 engine rpm
Shafts: .669” (1.7cm) diameter tapered shaft with 7/16” (1.1cm)
threaded end
Pulleys: Cast ductile iron “3V” pulleys
Shock Valve Relief: 3000 psi (206.8 bar)
Wheel Motors Two LSHT motors directly drive the track drive wheels.
Displacement: 32.3 in
3
/rev (82cm
3
/rev)
Mounting: Standard wheel mounting
Shaft: 1 3/8” (3.5cm) tapered shaft with 1.125” (2.9cm) threaded end
Lift Cylinders The lift circuit has 2 hydraulic cylinders that control loader height.
Bore Size: 1.75” (4.4cm)
Rod Size: 1.0” (2.5cm)
Stroke: 18.4” (46.7cm)
Working Pressure: 3000 psi (206.8 bar)
Dump Cylinder The Quick-Attach angle is controlled by a single hydraulic cylinder.
Bore Size: 2.75” (7cm)
Rod Size: 1.25” (3.2cm)
Stroke: 7.75” (19.7cm)
Working Pressure: 3000 psi (206.8 bar)
Hydraulic System