Textron Jacobsen Super LF 1880 Fairway Mower with ROPS, Service & Repair Instructions

Page: 252 / 300

ATTACHMENTS
12D-8
For the optional high profile bedknife, the front
face should be 0.09375 in (2.38 mm) For the
ultraknife, the front face should be 0.140625 in
(0.138 mm), see Figure 12D-3.
Figure 12D-3. Standard Bedknife Front Face
3. If wear or damage is beyond the point where the
reel or bedknife can be corrected by the lapping
process, they must be ground (see Section 12E).
4. Proper reel-to-bedknife adjustment is critical. A
gap of 0.001 to 0.003 in (0.025 to 0.076 mm) must
be maintained across the entire length of the reel
and bedknife.
5. The reel must be parallel to the bedknife. An
improperly adjusted reel will lose its sharp edges
prematurely and may result in serious damage to
the reel and bedknife.
6. Grass conditions will also affect the adjustment.
a. Dry, sparse conditions will require a wider gap
to prevent heat buildup and damage to the reel
and bedknife.
b. High quality grass with a good moisture con-
tent requires a closer gap (near zero).
7. Start adjustment at the leading end of the reel, fol-
lowed by the trailing end. The leading end of the
reel blade is that end which passes over the bed-
knife first during normal reel operation (see
Figure 12D-4).
Figure 12D-4. Reel Leading End
8. Set the leading edge of the reel.
9. Slide a feeler gauge or shim stock — 0.001 to
0.003 in (0.025 to 0.076 mm) — between the reel
blade and the bedknife. Do not turn the reel.
10.Adjust the trailing end of the reel in the same man-
ner, then recheck the adjustments at the leading
end.
11. When the reel is properly adjusted to the bedknife,
the reel will spin freely and you should be able to
cut a piece of newspaper, along the full length of
the reel, when the paper is held at 90° to the bed-
knife.
NOTE:
Avoid excessive tightening or damage may occur
to the bedknife and reel blades. The reels must
turn freely.
Figure 12D-5. Bedknife-to-Reel Adjustment
CUTTING HEIGHT ADJUSTMENT
All reels must be accurately adjusted to exactly the
same height for proper cutting.
It is best to use two gauge bars, one on each side of
the reel, then adjust each end equally.
NOTE:
See preceding section for bedknife-to-reel adjust-
ment.
1. Loosen the locknut on the side of the front roller
brackets just enough to allow the adjusting nut to
raise or lower the bracket.