MacDon A40D - Mechanical

262334 231 Revision A
6.2 Mechanical
A troubleshooting table is provided to help you diagnose and correct any problems you may encounter regarding the
mechanical aspect of the machine.
Problem Solution
Section
Symptom: Auger and/or conditioner rolls damaged by stones
Feed pan doesn't allow stones to fall
through.
Lower the rock-drop tines.
3.8.12 Setting Feed Pan and
Rock Drop Tine Position, page
100
Symptom: Excessive breakage of the knife sections or the guards
Ground speed too high in stony
conditions
Reduce the ground speed.
3.12 Selecting Ground Speed,
page 118
Cutting height too low in stony conditions
Raise the cutting height with the
skid shoes.
3.8.8 Setting Cutting Height,
page 89
Header angle too steep in stony
conditions
Decrease the header angle.
3.8.7 Adjusting Header Angle,
page 88
Header float too heavy in stony
conditions
Adjust to lighter float setting.
3.8.11 Checking and Adjusting
Float – M Series Self-Propelled
Windrowers, page 99
Knife speed too slow
Maintain the proper rpm on the PTO.
Check for proper match of the pump and
the gear-drive at PTO.
2.2 Product Specifications, page
25
Guards, knife and hold-downs misaligned
Straighten the guards, align the
hold-downs.
4.8.7 Guards, page 147
4.8.8 Hold-Downs, page 156
Symptom: Excessive heating of the hydraulic oil
Relief pressure too low Replace the relief valve.
Refer to Dealer
Symptom: Header stalling in extremely tall, heavy crop (6+ tons per acre)
Insufficient crop clearance at rear of feed
pan
Lower the rock drop tines (rear of the
header pan).
3.8.12 Setting Feed Pan and
Rock Drop Tine Position, page
100,or3.8.11 Checking and
Adjusting Float – M Series Self-
Propelled Windrowers, page 99
Insufficient crop clearance at rear of feed
pan
Remove the rubber fingers from the
auger at the delivery opening.
4.12 Replacing Rubber Fingers,
page 191
Insufficient crop clearance at rear of feed
pan
Increase the roll gap.
3.8.13 Adjusting Conditioner Roll
Gap, page 101
Feeding aids for shorter, lighter crop
impede flow of heavy or thick stemmed
crops (cane, sudan grass etc.)
Remove the front set of stripper bars.
4.13 Stripper Bar, page 192
Symptom: Header turns while unloaded but slows or stops when starting to cut
Low reservoir oil level Add oil to the reservoir.
4.7.1 Servicing Header
Hydraulics, page 142
Cold oil in system
Reduce the ground speed until the oil
reaches the operating temperature.
3.12 Selecting Ground Speed,
page 118
Defective motor
Repair the motor.
Refer to Dealer
Defective O-ring inside relief valve Replace the relief valve.
Refer to Dealer
Defective pump Repair the pump.
Refer to Dealer
Defective relief valve
Repair the relief valve.
Refer to Dealer
TROUBLESHOOTING