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Section 3: Adjustments
DM3705, DM3706, and DM3707 Series Disc Mowers 327-083M
9/15/06
Table of Contents
Belt Tension Adjustment
Belt must be properly tensioned at all times to avoid
excessive flopping and slipping. A loose belt will also
cause poor cutting and premature wear.
Check tightness of belt regularly, especially when
working the first few hours.
Always retighten or check belt after 4-8 hours of
operation.
Refer to Figure 3-1:
4. Loosen main pivot bolt.
5. Tighten nut on belt tension bolt until you have a
3/4” deflection using approximately 32 lbs. of force at
midpoint between pulleys. Tighten main pivot bolt.
Refer to Figure 3-2.
Belt Tension Adjustment
Figure 3-1
Tension Bolt
Pivot
Bolt
Cutting Height
Figure 3-4
20796
Cutting Height
Refer to Figure 3-4:
Cutting height can be adjusted with the upper 3-point
hitch link.
Maximum cutting height of 2 3/8” is achieved when the
discs are parallel to the ground. Adjustment of cutting
height is achieved by altering the cutter bar tilt angle.
This is done by varying the upper 3-point hitch link length
until desired cutting height is achieved. Shorten the
upper 3-point hitch link to lower and lengthen to raise.
To minimize blade and disc wear, improve grass
regrowth and get maximum nutritive value from the crop,
minimum cutting height should never be adjusted less
than 1 1/4“.
21032
Section 3: Adjustments
Belt Deflection
Figure 3-2
20766
3/4”
32 lbs at Midpoint