Hydraulic System - Toro TX525 Service Manual

Hydraulic System

Item
Gear Pump
Loader Valve
Auxiliary Valve
Hydrostatic Pumps The traction circuit is powered by dual hydrostatic pumps in a closed loop system. The
Wheel Motors
Lift Cylinders
Dump Cylinder
TX525 Service Manual
Specification
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):
A two-spool monoblock valve controls loader functions via a single lever joystick.
Main Relief Setting: 2400 psi (165.5 bar)
Loader Spool:
Tilt Spool:
A single spool valve controls the auxiliary flow 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 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
Pump Speed:
Shafts:
Pulleys:
Shock Valve Relief:
Two LSHT motors directly drive the track drive wheels.
Displacement: 32.3 in
Mounting: Standard wheel mounting
Shaft: 1 3/8" (3.5cm) tapered shaft with 1.125" (2.9cm) threaded end
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)
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)
6.0 gpm @ 3600 rpm (22.7 liter/min)
A 4-position spool with closed, raise, lower, and float positions
controls loader functions.
A 3-position spool with 3000 psi (206.8 bar) work port relief controls
the dump/curl cylinder functions.
/rev (3.25cm /rev)
3 3
3050 rpm through pulley reduction @ 3600 engine rpm
.669" (1.7cm) diameter tapered shaft with 7/16" (1.1cm)
threaded end
Cast ductile iron "3V" pulleys
3000 psi (206.8 bar)
/rev (82cm /rev)
3 3
Rev. 000
SPECIFICATIONS
2-3