SECTION 4 - MAINTENANCE
4-7
Discs with drums can be removed by first removing
the drum covers, 1; the four disc/drum retaining bolts
can then be removed.
Reinstall discs at right angles to each other, as shown
in Figure 9. Be sure the correct hardware is installed
as follows:
Discs with caps 1/2″ x1″ cap screws.........
cupped lock washers
Discs with drums 1/2″ x1-1/4″ cap screws........
thick hardened washers
IMPORTANT: Use of incorrect disc retaining
hardware may cause cutter bar lock-up and potential
damage, or may prevent proper retention of discs.
Torque retaining bolts to 113 N⋅m (83 ft-lb).
NOTE: Do not overtighten as bolts may yield causing
failure.
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CUTTER BAR INSPECTION
The cutter bar should be inspected for damage or
wear on a regular basis, such as when turning or
replacing knives. Inspect the cutter bar more
frequently when operating in known rocky condi-
tions.
• Inspect the external components for damage,
paying particular attention to the knives, 1, and
discs, 2. Broken knives and bent or cracked discs
and lifters are a result of contact with solid foreign
objects, and may indicate possible internal
damage. A disc out of time may also indicate
internal damage; the discs are properly timed
when they are positioned 90° to each other as
shown.
WARNING
Replace damaged knives, knife hardware or
discs immediately to prevent an accident. Failure
to comply could result in death or serious injury.
Misalignment or gaps between the disc modules
and spacers may indicate the tie bolts are loose
or broken, or the dowel pins between the
components have failed or are missing.
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