Power Transmission - Husqvarna PT26D Workshop Manual

Power transmission

The power transmission to the drive gear is hydrostatic. Also see the Sauer Danfoss manual under
"System components Manuals" on page 48.
A drive axle, connected to the engine's flywheel, is equipped with two elastic clutches that drive an axial
piston pump (9) for the drive system.
The axial piston pump, which is located under the driving position, can be variably flow controlled with the
pedals for driving forwards or reversing. It receives its feed pressure from the working hydraulic's pump (8).
A flushing valve (10) is connected to the pump A and B sides and ensures oil replacement to prevent over-
heating. The oil is cooled by the cooler (12), which is integrated with the diesel engine's radiator.
The valve block for the transmission (6) has solenoid valves for the differential lock and high/low gears.
The block leads the oil to the four hydraulic motors (7), that drive each wheel.
Tank (14) and filtering (11, 13) are common to the whole hydraulic system. Also see chapter "Hydraulic
System" on page 43.
Differential Lock
The machine is equipped with an electro-
hydraulic differential lock, which is controlled
by a pedal switch. The differential lock only
works longitudinally, which means that you
can turn the machine with the differential lock
activated.
The differential lock is electro-hydraulic and
can therefore be engaged or disengaged dur-
ing operations without damage occurring.
The differential lock does not work in high
gear.
Power transmission
DESIGN AND FUNCTION
Differential lock pedal
8009-869
6.Valve block transmission
7. Hydraulic motors
8. Pump working hydraulics
9. Axial piston pump
10. Flushing valve
11. Suction filter
12. Radiator
13. Hydraulic oil filter
14. Drive system
8043-163
English-
33