Height Of Cut - Jacobsen Fairway 250 JGZZ250 Operation And Maintenance Manual

9 ADJUSTMENTS
9.5

HEIGHT OF CUT ____________________________________________________

First you set the rear roll parallel to the bottom blade
(bedknife). You set the minimum-height of cut setting for the
three ranges of height. Adjust the setting with the three sets
of holes in the mounting housing (D) at positions 'A', 'B' and
'C'.
Setting the minimum height with the mounting housings (D)
in position 'A' allows a parallel-minimum height in positions
'B' and 'C'. Select the range and set the correct height of cut
when you adjust the front roll carriage screws (F) and
locknuts (J).
TO SET REAR ROLL
Use a new bottom blade (bedknife).
1. Set the height of cut setting bar (G) shown below:
a.Screw X to 12 mm under the head.
b.Screw Y to 6.5 mm to screw thread tip.
Note:The difference between screw X and screw Y is 5.5
mm.
2. Set the roll carriage mounting housing (D) bolts into
holes 'A'.
3. Put the setting bar (G) as shown at one end of the
bottom blade with the screw head X over the lip.
The screw thread Y tip must touch against the base
of the blade.
4. Adjust the roll to the setting bar (G) while the two
locknuts (H) hold the setting bar screws in
contact.
5. Repeat for other end of bottom blade (bedknife).
TO SET HEIGHT OF CUT
Select the range of height in which the machine will cut.
Adjust the front roll only.
1. Set the height of cut setting bar (G) with the
procedure shown below:
a.The screw X is set to the height of cut needed
under the head.
b.The screw Y is not used.
2. At one end of the bottom blade (bedknife) put the
setting bar (G) on rear roll. Make sure that the
screw head is over the bottom blade lip.
3. Adjust the front roll to the setting bar with the two
front locknuts (J).
4. Repeat for the other end of the bottom blade.
en-74
Height of Cut Minimum
Range Height of Cut
Holes 'A' 12.0 mm
Holes 'B' 19.0 mm
Holes 'C' 27.0 mm
CAUTION
The height of cut range for each set of holes
is set from the requirement of the cutting unit
to float. An increase in the maximum height of
cut in any of the ranges can decrease the
ability of the cutting unit to float.
Maximum
Height of Cut
19.0 mm
35.0 mm
47.0 mm