Engine; Hydraulic System - Husqvarna R 318X Workshop Manual

8.3 Engine

The product has an air-cooled engine from Briggs &
Stratton or Kawasaki. Information about engine repairs
is not given in the workshop manual. Refer to the engine
manual supplied by the engine manufacturer.

8.4 Hydraulic system

All AWD products have hydrostatic transmission.
Forward and rearward pedals adjust the speed. AWD
products have permanent four-wheel drive, no
differential lock is necessary. The integrated hydraulic
pump in the rear transmission supplies oil to the central
steering unit and the front and rear transmissions.
Cables from the forward and rearward pedals operate
the hydraulic pump.
The hydraulic oil filter is found in the rear section of the
rear transmission. The hydraulic tank is found above the
rear transmission.
The illustration shows the front transmission from above.
The transmission contains a hydraulic motor, a
differential and a drive shaft. To move the product
without the front transmission operation engaged there
is a mechanical bypass valve. The bypass valve is
operated with a lever adjacent to the front left wheel.
The bypass valve must be closed during operation. If the
855 - 002 - 28.03.2019
bypass valve is open, the oil drains from the
transmission.
The hydraulic oil in the front transmission is drained
through 2 plugs on the bottom of the front transmission.
The illustration shows the rear transmission from above.
To move the product without the rear transmission
operation engaged there is a hydraulic bypass valve.
The bypass valve is operated with a control behind the
rear left wheel.
The hydraulic oil in the rear transmission is drained
through 2 plugs on the bottom of the rear transmission.
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