Bedknife Adjustment; Cutting Height - Jacobsen Super LF 1880 67955 Safety, Operation And Maintenance Manual

9 ADJUSTMENTS

9.12 BEDKNIFE ADJUSTMENT __________________________________________________

1. Read Section 9.11 before making the adjustment.
7. Start adjustment at the leading end of the reel,
followed by the trailing end. The leading end of the
reel blades is that end which passes over the
bedknife first during normal reel rotation.
8. Use adjusters (B and C), to adjust gap. Rotate
adjusters (Clockwise) to close gap. Each click of the
adjuster moves the bedknife 0.001" (0.025 mm)
closer to the reel.
a. Slide a feeler gauge or shim stock 0.001" - 0.003"
(0.025 - 0.075 mm) between the reel blade and
the bedknife. Do not turn the reel.
b. Adjust the trailing end of the reel to the same
gap in a similar manner then recheck the
adjustment at the leading end.
c. 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 bedknife.

9.13 CUTTING HEIGHT _________________________________________________________

Note: Always make the reel to bedknife adjustment
before adjusting height of cut. (Sections 9.11 and 9.12).
1. Raise mowers to transport position then engage the
parking brake, stop engine, and remove key from
ignition switch.
2. Set desired cutting height on the gauge (D).
a. Measure distance between the underside of
screw head and gauge block surface (E).
b. Adjust screw (F) to obtain desired height then
tighten the wing nut.
3. Loosen the nuts (G) on the front roller brackets just
enough to allow the adjuster knob (I) to raise or lower
the front roller.
4. Place gauge (D) across bottom of front and rear
rollers near one end of roller.
5. Slide the head of gauge screw (F) over the bedknife
(H) and adjust the knob (I) to close the gap between
the screw head and bedknife. Then tighten locknut
(G).
6. Repeat Steps 4 and 5 on opposite end. Complete
adjustment to one end before adjusting opposite end.
7. Tighten nuts (G) and recheck each end.
40
NOTICE
Avoid excessive tightening or serious damage may
result to bedknife and reel blades. Reels must turn
freely.
B
I
G
D
C
Figure 9L
H
F
E
Figure 9M