MacDon 873 Combine Adapter - Manual (Page 38)

Form # 147069 Issue 09/06 36
TROUBLESHOOTING
SYMPTOM PROBLEM SOLUTION REF.
FEEDING (continued)
Adapter drum wraps crop. Crop susceptible to wrapping.
E.g. flax
Adjust drum tine pitch to decrease
aggressiveness 32
Gleaner: Poly side panels set
too wide. Narrow the opening by moving poly
panels to achieve 930 mm opening. 41
Feed chain jumping. Gleaner: Poly side panels set
too wide. Narrow the opening by moving poly
panels to achieve 930 mm opening. 41
Crop backs up or hesitates
on feed draper.
Feed chain drum too low. Move drum to corn position. **
Heavy crop plugging between
adapter drum and feed draper. Move drum to raised position on adapter
frame. (Not for 972 Header) 32
Insufficient RTD speed caused
by:
Relief pressure too low. Increase relief pressure to
recommended setting.
30
Sequence valve or relief valve
malfunction.
Replace sequence or relief valve or
repair cause of flow restriction.
31
Recommended relief setting too
low.
Increase relief to 3400 psi. 30
See also” Adapter drum back-
feeds”, pg. 32
Crop back feeds on center
feed draper
Excessive clearance from
combine feed drum to adapter
feed draper.
Add feeder chain links to achieve less
clearance between combine feed drum
and adapter feed draper. To prevent
damage, ensure a 1-2” (25-50 mm)
clearance between combine drum and
adapter drum. (Combine drum floated
up).
**
Side drapers back-feed. Side drapers running too slow in
heavy crop.
Increase draper speed. 17
Adapter drum tines too close to
header side drapers. Remove tines at ends of drum to
maintain 2” (50 mm) gap to draper. 32
Side drapers improperly set with
respect to feed draper.
Set draper opening for width of adapter. ***
Adapter drum too low. Move drum to raised position on adapter
frame. (Not for 972 Header) 32
Crop is thrown across
opening and under
opposite side draper.
Side drapers running too fast in
light crop.
Reduce draper speed. 17
Excessive overlap of feeder
draper.
Center side draper drive rollers over
feed draper side deflectors.
***
Hesitation in crop flow at
sides of feeder house.
Rear deflector fins set too wide. Set side deflectors narrower. 41
** - See your Combine Operator’s Manual. / *** See your Header Operator’s Manual.