8-28 673831-Rev A
CUTTING UNITS
8
Installation
See Figure 8-21.
Figure 8-21
• When installing bedknife backing assembly (6), do
not use a metal hammer to force the bedknife
adjustment rod (1) into the slot on the bedknife
backing assembly.
• Apply anti-seize compound to the threads of both
bedknife backing mounting screws (12) prior to
installation.
1. Lift the nut end of bedknife adjustment rod (1) to
provide clearance for installing bedknife backing
assembly (6), then install bedknife backing assembly
and bedknife backing mounting screws (12). Position
bedknife adjustment rod on each side of cutting unit
in the slots on bedknife backing assembly.
2. Turn bedknife adjustment rod (1) until bedknife
adjustment gear (5) contacts the bedknife (6).
3. Repeat step 2 for other side of cutting unit.
The cupped side of the Belleville washer (8) should face
the half trunnion (7) when installed.
4. Install half trunnion (7), Belleville washer (8), and
shim washer (9) (if equipped).
• Do not over tighten slotted nut (10) during
installation. Over tightening the slotted nut will make
it more difficult to turn the bedknife adjustment rod
(1) during bedknife-to-reel adjustment.
• When installing slotted nut, center the bedknife
adjustment rod within the circular profile of the slot on
the bedknife backing assembly and then hold the
bedknife adjustment rod to prevent the bedknife
adjustment rod from turning.
5. Thread slotted nut (10) onto bedknife adjustment rod
(1) just enough to remove clearance between
components (no end play). Tighten slotted nut (10)
one full flat, then continue to tighten nut until hole in
bedknife adjustment rod aligns with the next slot in
slotted nut.
6. Install hair pin (11).
7. Check force needed to turn adjuster. If turning
bedknife adjustment rod is difficult, remove cotter pin
and loosen nut until the hole in bedknife adjustment
rod aligns with the next slot in slotted nut.
8. Check to ensure there is no end play in the
components. If there is no end play, install hair pin
and proceed to step 9. If end play has been created,
tighten slotted nut until hole in bedknife adjustment
rod aligns with the next slot in slotted nut, insert hair
pin and proceed to step 9.
9. Repeat steps steps 4 through 9 for other side of
cutting unit.
10. Hold bedknife adjustment rod (1) and turn jam nut (4)
to achieve a distance (13) of 1.500 ± 0.060 in. (38.1 ±
1.5 mm) between inside of Belleville washer (3) and
cradle (2) on each side of cutting unit.
11. Adjust bedknife-to-reel clearance. (See
“Bedknife-to-Reel Clearance Adjustment” on
page 8-18.)
12. Install cutting unit to mower. (See “Cutting Unit” on
page 8-22.)
Required Materials
Anti-Seize Compound
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