Textron JACOBSEN GP400, Technical/Repair Manual

Page: 289 / 354

CUTTING UNITS
4252490-Rev A 8-17
8
Checks and Adjustments
Bedknife-to-Reel Clearance
Adjustment
See Figures 8-2 and 8-3.
!
CAUTION
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
Figure 8-2
NOTES
• Clearance between the bedknife and reel should be
checked with a feeler gauge. Slide the feeler gauge
between the bedknife and reel. There should be a
slight drag on the feeler gauge. Do not turn the reel
while making the check. Clearance should be
checked at the outer ends of the reel, then at the
inner set of spiders (1), and then in the middle.
• The bedknife-to-reel adjustment should be made by
starting with the leading end of the reel (3) and
following with the trailing end (2). The leading end of
the reel blade is the end that passes over the
bedknife first during normal reel rotation.
Figure 8-3
2. Adjust bedknife-to-reel gap to 0.001–0.003 in.
(0.025–0.075 mm) between reel blade and bedknife
using upper adjuster (4) and lower adjuster (5) on
both leading and trailing edges of reel.
NOTES
• Move the adjusting screws in very small increments
when making bedknife-to-reel adjustments.
• Keep the adjusting screws tight against the bedknife
backing for a positive clearance setting.
• Avoid aggressive tightening, or damage may occur to
bedknife and reel blades.
• Poor bedknife-to-reel adjustment will occur if one
screw is loosened too much and the other screw is
brought in.
• Inconsistent bedknife-to-reel clearance settings will
occur when opposing screws are at a low torque
value. Final bedknife-to-reel adjustments may be
done on the appropriate (single) opposing screw.
During final adjustments, screws must be tightened,
never loosened.
• When the reel and bedknife are properly adjusted,
the reel will spin freely and will cut a piece of
newspaper along the full length of the reel when the
paper is held at a 90° angle to the bedknife.
To prevent personal injury and damage to the
cutting edges, handle the reel with extreme care.
TN2558
2
3
1
TN0893
4
5