Hydraulic System - Stiga Park 2WD Workshop Manual

Contents in this chapter
4.1 Safety ................................................. 2
4.2 Configuration .................................... 2
4.2.1 Hydraulic diagram (Version 2019 -
with lift) ................................................... 5
4.2.2 Hydraulic diagram (Version 2019 -
without lift) .............................................. 6
4.3 Hydraulic pump integrated in the
rear axle drive ....................................... 7
4.3.1 Physical description ....................... 7
4.3.2 Functional description ................... 8
4.4 Separate hydraulic pump for the
power transmission ............................. 11
4.4.1 Physical description ..................... 11
4.4.2 Functional description ................. 12
General
The four wheel drive Park machines are equipped with hydraulic power transmission. I.e.
the engine drives an hydraulic pump, which pumps oil through the rear and front axle
drives. There are two main configurations; separate hydraulic pump and the hydraulic
pump integrated in the rear axle drive.
The front axle and rear axle are connected in series, which means that the front wheels
and rear wheels are forced to rotate at the same speed. To make turning easier, both axles
are equipped with a differential.
Some of the machines, both 2WD and 4WD, are also equipped with hydraulic assisted
steering and implement lifter.
Front-mounted implements are powered via drive belts.
This chapter contains a description of the hydraulic system, trouble shooting to isolate
faults and information about adjustments and corrective measures.
Since the steering torque converter and lifting cylinder belong to the respective chapter
(2 and 3), these components are described in detail in these chapters.
WORKSHOP MANUAL
PARK

4 Hydraulic system

Chapter
4 - Hydraulic system
4.5 Hydraulic assisted steering and im-
plement lifter ......................................... 15
4.5.1 Physical description ..................... 15
4.5.2 Functional description ................. 16
4.6 Hydraulic assisted steering .......... 21
4.6.1 Physical description ..................... 21
4.6.2 Functional description ................. 21
4.7 Trouble shooting ............................. 22
4.7.1 Drive system ................................ 22
4.8 External hydraulic .......................... 24
4.9 Change of trans oil, 4WD ............... 27
4.9.1 Transmission with external pump . 27
4.9.2 Transmission with the hydraulic
pump in the rear axle drive ................... 30
EDITION Page
2018 1