MacDon FD75 OM - Manual (Page 420)

TROUBLESHOOTING
7.4 Header and Drapers
Symptom Problem Solution Section
Insufficient header lift Low relief pressure Increase relief pressure
Refer to your combine
operator’s manual
Speed control set too low Increase control setting
4.7.7 Draper Speed, page
148
Relief pressure too low
Increase relief pressure to
recommended setting
Worn out gear pump Replace pump
—
Combine header drive too
slow Adjust to correct speed for
combine model
Insufficient side draper
speed
Pressure compensator
(V7) set too low
Adjust to increase setting
Refer to your combine
operator’s manual
Drapers are loose Tighten drapers
Drive or idler roller
wrapped with material Loosen draper and clean
rollers
Slat or connector bar
jammed by frame or
material
Loosen draper and clear
obstruction
6.11.3 Adjusting Side
Draper Tension, page 336
Roller bearing seized Replace roller bearing
6.11.6 Draper Roller
Maintenance, page 340
Low hydraulic oil Fill reservoir to full level Adding Oil, page 275
Draper will not drive
Incorrect relief setting at
flow control valve
Adjust relief setting —
Lower reel
4.7.9 Reel Height, page
151
Material not feeding
evenly off knife
Install stub guards
See your MacDon Dealer,
6.8.7 Knife Guards, page
304
, Knife Hold-Downs,
page 309 , and 8.1.16 Stub
Guard Conversion Kit,
page 420
Draper stalling
Material accumulates
inside or under front edge
of draper
Adjust deck height
6.11.5 Adjusting Deck
Height, page 339
169894 406 Revision A