MacDon 4000 Mower Conditioner - Manual (Page 55)

55
ROLL TIMING (RUBBER ROLLS SHOWN)
MAINTENANCE/SERVICE
ROLL TIMING
For proper conditioning, the rolls must be timed
with the rubber lug (or steel bar) on one roll
centered on the groove of the other roll.
WARNING: To avoid bodily injury or
death from unexpected start-up or
fall of raised machine; stop engine,
remove key and engage lift cylinder
stop before going under machine to
examine roll timing, or for any
reason.
Examine roll timing along the length of the rolls
and adjust to desired position as follows:
1. Loosen two bolts (A) in slots at yoke plate on
either upper or lower roll universal shaft.
2. Remove one bolt (B) in hole at yoke plate.
3. Turn rolls to achieve best timing, aligning one
of the other holes in yoke plate.
4. If more range is required, repeat steps 1 - 3 at
the other yoke plate.
5. If range is still insufficient to achieve adequate
roll timing, remove all three bolts at one of the
yoke plates and rotate the roll 1/3 turn.
6. When roll timing is satisfactory, replace and
tighten all bolts to secure the position.
NOTE: This adjustment should be made in
conjunction with the "Roll Gap" adjustment,
detailed in Operation section.
ROLL TIMING ADJUSTMENT