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84 CropHawk Draper Platform Operators Manu-
Trouble Shooting
Continued on next page
Symptom
Problem
Solution
Reference
FEED DRUM SYMPTOMS
Retractable finger bearings
fatiguing/ failing
Feed drum is over sped
Non genuine retractable finger
bearings have been fitted.
Retractable finger impact shock
from sticks and rocks.
Test feed drum speed is between 220—
255 RPM at working speed. If combine is
fitted with a variable speed feeder house
output shaft, ensure that it is locked at
the correct speed.
Replace with genuine MidWest parts.
Lift platform over sticks & rocks.
Excessive noise from feed
drum.
Feed drum contacting combine
feeder house chains.
Retractable finger nylon guides
excessively worn.
Feed drum bearing failed.
Bent or damaged retractable
finger.
Adjust feed drum away from combines
feeder house chains.
Replace nylon finger guides as required.
Replace feed drum bearing as required.
Replace finger as required.
DRIVE SYSTEM SYMP-
TOMS
Drive system vibration
Incorrect knife timing.
Input PTO shaft universal joint
damaged.
Failed bearing on drive shafts
Feeder house drive speed too
fast
Adjust knife timing.
Replace input PTO universal joint as
required.
Replace bearing as required.
Check speed and refer to combine
operators manual
Knife drive gearboxes slow-
ing or stopping.
Knife drive clutch slipping.
Sheared keyway on drive
system sprockets/ pulley.
Damaged knife guard stalling
knife.
Broken knife drive belt.
Re-tension knife drive clutch as required.
Replace as required.
Replace knife guard as required.
Replace drive belt.