Cutting Height; Cutting Height Adjustment - McConnel PT6 Operations & Parts Manual

CUTTING HEIGHT

The cutting height of the mower is determined by the position at which the side skids are
mounted on the machine – height adjustment is made by selecting higher or lower pairs of holes
in the skids through which to attach the mounting bolts.
It is advisable to increase topping height by an extra 25mm (1") to avoid 'grounding' of the
machine when cutting on uneven terrain.
Each side skid is fixed into position with 4 nuts and bolts (2 front & 2 rear) and may be mounted
at four different cutting heights from 17.7mm to 107.7mm.
The diagram below shows the skid height adjustment positions where 'A' is the minimum cutting
height and 'D' is the maximum.
Cutting Heights
A = 24.2mm (0.95")
B = 54.2mm (2.13")
C = 84.2mm (3.31")
D = 114.2mm (4.5")

CUTTING HEIGHT ADJUSTMENT

WARNING: As adjustment to the cutting height requires initial removal of the skids it is vital that
both machine and tractor are switched off, the unit parked on firm level ground and safely
supported or 'blocked' before attempting this procedure – ensure when refitting the skids that
matching sets of holes front and back and side to side are selected so that the mower remains
parallel to the ground.
IMPORTANT: To avoid damage to the machine re-torque all bolts after the first 10 hours of
initial operation – thereafter all bolts should be checked at regular intervals and re-tightened if
required. The required torque setting for the blade carrier retaining nut on the gearbox lower
shaft is 450 ft. lbs (610 Nm).
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