Husqvarna Rider PR 17 Workshop Manual page 35

DESIGN AND FUNCTION
PR 17 AWD only has a mechanical equipment lift, while PF AWD has both a mechanical and hydraulic lift.
The cutting unit can be raised or lowered in two different ways: with the mechanical lifting lever or with a hydraulic
cylinder. Both methods work by rotating a shaft. When the shaft is rotated, the chain attached to a segment
inside the end of the shaft will raise or lower the equipment frame.
When lowering the unit, the two connecting rods, via the three-point link, will alter the belt adjuster so that the
drive belt is tensioned and the blades begin to rotate. When lifting the unit, the spring on the forward directed
pressure rod will apply the blade brake on the belt pulley. The blades are braked and stop sooner. When the unit
is raised, the chain link bolt activates the safety system microswitch.
See "Adjusting the Lever Housing" on page 69 for adjustment instructions.
The unit's lifting device
The cutting height is adjusted using the lever that is attached to the shaft with a joint and a spring. The same
shaft holds the adjuster for the cutting height range. See "Adjusting the Cutting Height Range" on page 87. Two
connecting rods, via a three-point link, activate the protective frame around the cutting unit and raise or lower the
cutting unit cover within the cutting height range. The horizontal connecting rod is housed in an oblong groove in
the equipment frame on ProFlex.
There are two struts on the top of the cutting unit cover. The upper one is coupled between the horizontal
connecting rod and the tongue of the forward perpendicular shaft on the top of the cutting unit cover. When the
shaft is rotated, it will raise or lower the cutting unit cover in relation to the protective frame. The lower strut (the
parallel strut) is coupled between the tongues on the forward and rear perpendicular shafts, so that the rear shaft
is also rotated in the same way as the forward shaft. There is an adjuster on the parallel strut to adjust the cutting
.
unit cover's parallelism with the ground. See "" on page 87 for adjustment instructions
Cutting height adjustment
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