Replacing The Hydraulic Pump For The Drive System - Husqvarna PT26D Workshop Manual

Replacing the hydraulic pump for the drive system

1. Drain the hydraulic tank. Treat the oil as
waste oil.
2. Remove the driver's seat, the fuel tank
and the plate over the hydraulic pump's
drive axle.
3. Ensure that the engine cannot start.
4. Remove the bolts to the front clutch for
the drive axle and spacer ring.
5. Remove the bolts to the rear clutch for
the drive axle and remove the drive axle.
6. Remove the sensor for the hydrostatic
control.
7. Place a container under the hydraulic
pump to collect the waste oil.
8. Clean according to the general instructions.
9. Connections can be interchanged. Mark
the hydraulic hoses so that they are
reassembled on the correct connections.
10. Release the hydraulic lines from the
hydraulic pump. Fit protective plugs.
11. Release the hydrostatic control from the
operating lever on the hydraulic pump.
12. Release the shock absorber from the
operating lever on the hydraulic pump.
13. Loosened the fastening bolts on the sen-
sor holder a few turns so that the sensor
holder can be angled outwards and run
free of the hydraulic pump bracket when
the pump is lifted upwards.
14. Remove the upper fastening bolts on the
front pump bracket.
15. Remove the four fastening bolts holding
the rear pump bracket on the hydraulic
pump bracket and lift the pump upwards.
When replacing the pump, transfer over parts
IMPORTANT INFORMATION
When transferring parts to the new pump,
the locking screws to the clutch flange
against the input shaft must not be
tightened before the pump is fitted and the
fastening bolts on the front clutch have
been tightened. Risk of axial strain on the
pump's input shaft.
not fitted on the new pump.
16. Assemble the hydraulic pump and tighten
the fastening bolts on the pump brackets.
17. Connect the hydraulic lines according to
the markings. Tightening torque accord-
ing to the table.
114
English-
REPAIR INSTRUCTIONS
Hydraulic pump drive system
Front clutch
Hydrostatic control sensor
Locking screw
8043-168
8043-113
8043-109
8043-119