Cutting Height - Jacobsen AR-5 Parts & Maintenance Manual

3.8

CUTTING HEIGHT _________________________________________________________

Cutting height for decks can be adjusted from 3/4 to 5-1/4
in. (19-133 mm) in 1/4 in. (6 mm) increments. Actual
cutting height may vary somewhat from the heights given
depending on turf conditions and other factors.
Note: When cutting undulating areas, lower cutting
heights may cause scalping. Adjust height accordingly to
prevent turf damage.
1. Park the tractor on a flat, level surface. fully lower
cutting units. Place blocks under deck housings so
they are supported on all sides.
!
To prevent serious injury, lower deck until it is
resting completely on the front casters and rear
roller. This will prevent it from accidentally
lowering while making adjustments. Disengage all
drives, engage parking brake, stop engine and
remove ignition key.
2. Refer to the chart provided for desired cutting
height.
!
CAUTION
Use proper lifting techniques when lifting or lowering
deck housings. The deck housing assemblies weigh
approximately 50 lbs (23 kg).
3. To lower height of cut, remove all three snap lock
pins (A). Lift outer spindle shaft (B) slightly and
remove 1/2 in. (13 mm) spacers (D) and / or 1/4 in
(6 mm) spacer (E) from bottom one at a time until
desired height is obtained. Carefully remove blocks
and lower deck housings (C). Place remaining
spacers on top of spindle and insert snap lock pins.
Washer (F) is always on top, under snap lock pin.
4. To raise height of cut, remove all three snap lock
pins (A). Carefully lift deck housing (C) above
desired cutting height and support with blocks. Add
1/2 in. (13 mm) spacers (D) and / or 1/4 in. (6 mm)
spacer (E) as required until desired height is
obtained. Lower deck housing. Place remaining
spacers on top of spindle and insert snap lock pins.
Washer (F) is always on top, under snap lock pin.
CAUTION
For best quality of cut, always place the same number
of spacers under deck housing on all three spindles.
Adjust all decks to same cutting height.
WARNING
ADJUSTMENTS
Height 1/2" Spacers
of Below Mower
Cut Housing
3/4 0
1 0
1-1/4 1
1-1/2 1
1-3/4 2
2 2
2-1/4 3
2-1/2 3
2-3/4 4
3 4
3-1/4 5
3-1/2 5
3-3/4 6
4 6
4-1/4 7
4-1/2 7
4-3/4 8
5 8
5-1/4 9
A
C
F
D
B
D
E
Figure 3G
1/2" Spacers 1/4" Spacer
Above Mower Location
Housing
9 Above Housing
9 Below Housing
8 Above Housing
8 Below Housing
7 Above Housing
7 Below Housing
6 Above Housing
6 Below Housing
5 Above Housing
5 Below Housing
4 Above Housing
4 Below Housing
3 Above Housing
3 Below Housing
2 Above Housing
2 Below Housing
1 Above Housing
1 Below Housing
0 Above Housing
GB-11
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