MacDon 742 HAY CONDITIONER - Manual (Page 74)

Form # 46290 Issue 09/05 72
MAINTENANCE/SERVICE
REEL AND REEL DRIVE
Reel Clearance To Cutterbar
Reel finger to sickle guard minimum clearance with
reel fully lowered is 5/8" (15 mm), measured at both
ends of the cutterbar.
Check all possible points of contact between points
(X). Depending on reel fore-aft position, minimum
clearance can occur at guard tine, hold-down or
cutterbar.
Check reel clearance whenever the reel fore-aft
position or finger pitch is changed.
When operating reel with an aggressive finger pitch, be
sure that fingers will not contact sickle when flexed
back by crop, as at (R).
To adjust reel clearance to cutterbar:
1. Raise header and engage header lift cylinder stops.
Lower header onto stops. Lower the reel fully.
2. Loosen and back off nut (A).
3. Turn nut (B) clockwise to increase clearance to
cutterbar, or counter-clockwise to decrease.
4. Tighten nut (A) against nut (B) to secure the
position.
5. Repeat at opposite side.
Reel "Frown" Adjustment
The reel has been factory adjusted to give more
clearance at the center of the cutterbar than at the
ends. This compensates for flexing of the reel and
header over rough ground.
The "frown" is adjusted by repositioning the hardware
connecting reel finger tube arms to reel discs.
If reel is disassembled for service, adjust positioning of
hardware in holes (C) to maintain the proper profile.
NOTE: Take these measurements with the reel
centered over the cutterbar (see "Reel Position" in
Operation section). This will provide adequate
clearance at all reel fore-aft positions.
NOTE: This adjustment can also be used to
compensate for reel tube and cutterbar tolerances.
When adjusting, start with the reel arm set closest to
the center of the header, and work your way out to the
ends, allowing the reel arms to find a natural curve,
and positioning the hardware appropriately.
NOTE: In some locations, top and bottom bolts in the
same reel arm may not be in the same hole position.
A
B
REEL CLEARANCE ADJUSTMENT
REEL "FROWN" ADJUSTMENT
REEL CLEARANCE TO SICKLE
(measured at both ends)