MacDon R85 Rotary Disc 16 Foot Self-Propelled Windrower Headers - Manual (Page 81)

OPERATING THE HEADER
3. Position gauge (A) at left end of rolls and manually
turn the rolls to engage the gauge. The rolls will
automatically adjust to the correct timing. Using the
roll gap adjustment bolt, reduce the roll gap until the
roll sits lightly on the gauge.
This will provide for a roll gap of 0.43 in. (11 mm) and
a roll timing setting of 0.16 in. (4 mm).
4. Repeat procedure for right end of the conditioner.
5. Tighten bolts in slots of yoke plate to secure the upper
conditioner roll position.
6. Turn the rolls manually to release gauge.
CAUTION
To ensure gauge is not forcibly ejected from rolls
when machine is started, ensure gauge is securely
re-attached to frame.
Figure 6.11: Roll Timing Gauge
A - Timing Gauge MD #150572
169457
73
Rev. F