Bush Hog HM2008, HM2009 Problem/Fault Analysis and Corrections, Possible Cause, Model HM2007

Problem/Fault Analysis and Corrections

Problem	Possible Cause	Correction
Cutterbar swinging to the	Stabilizer lock engaged.	Disengage stabilizer lock.
rear or cannot follow the
ground.	Stabilizer not correctly adjusted.	Adjust right hand lifting arm tractor correctly.
	Stabilizer fitted in wrong hole on	Check correct fitting.
	the tilting bracket or wrong tilting
	bracket in use.
	Wrong stabilizer spring fitted.	Model HM2007 and model HM2008 thread -
		diameter = 13mm (.51”) . Color = green.
		Model HM2009 thread - diameter = 15 mm (.59”).
		Color = black.
	Very hilly ground.	The machine can be equipped with a spring
		lock.
Adjustment of spring	The lifting arms of the tractor are	Fit chain so that the linkage of the machine is
is changing.	lowering slowly (leaky valve).	kept in the correct position.
Machine hangs too low when	Working height of linkage wrong	Check correct fitting.
it is raised with the three-point	and or wrongly adjusted stabilizer.
linkage of the tractor.
Swath is not satisfactory.	Swath roller or swath board.	Change, if necessary, from swath roller to swath
		board or contrary.
	Model HM2007:	Fit cone on the left hand side.
	These machines have no cone
	on the left hand side.
Uneven stubble.	Stabilizer not correctly adjusted.	Adjust right hand lifting arm of the tractor
		correctly.
	Forward speed too slow.	Increase forward speed.
	PTO rpm of the tractor is too low.	Increase PTO speed to max. do not exceed
		575 rpm.
	Cutting knives too blunt or some	Turn cutting knives or replace them.
	knives missing.
	V-belts too loose.	Tighten V-belts.
*Stripes in the stubble.	Inclination of cutterbar not correct.	Adjust the top link so that the inclination of the
		machine is changed.
	Cutterbar fitted with high cut skid.	Remove high cut skid.
	Packing of material on the cutting	Try to fit throwing wings on one or several
	discs.	cutting discs.
	Forward speed too slow.	Increase forward speed.
Cutterbar overheating.	Too much oil in the bar.	Check the oil level.
	Wrong type of oil used.	Change the oil to correct type.
PTO knocking.	The inclination of the machine is	Adjust the machine vertically.
	wrong (low stubble height).

*Strip problems can occur especially in short, heavy spring crops harvested under unfavorable weather conditions. At first always ensure that the knives of the cutting discs are kept sharp. Try to change the inclination of the machine a little (forwards or backwards). Be sure that the PTO shaft does not bottom, when the length of the top link is changed.

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