8999070: v3 03/09/2018
Page 7.1 of 7.1 pages
Original instructions (ENGLISH)
Website: www.spearheadmachinery.com
7
Troubleshooting
The charts below are intended to help in diagnose and rectify any problems with your machine. If the problem persists,
please consult your supplier, or contact Spearhead Machinery. See the Machine Identification page; Section 1.4.
7.1
Troubleshooting
PROBLEM
CAUSE
SOLUTION
Shear-bolt failure on start up
Tractor revs too high
Reduce revs to idle before engaging
P.T.O.
Incorrect shear bolt
Check the shear bolt is the correct
grade and size.
Shear-bolt failure in operation
Obstacle encountered
Inspect ground for stones, stumps,
etc. before replacing with the correct
grade of bolt
Excessive vibration
Broken or missing blade
Check blades and replace with new if
necessary
Cracked or damaged flexible coupling Check couplings and replace with
new if necessary
Clashing blades
Incorrect blade timing
Check the blade timing is 90° out of
phase and correct if necessary
Uneven stubble
Travelling too fast
Reduce forward speed
Ragged stubble
Blunt blades
Replace blades
Scalping ground
Skids set too low
Reset skid height
Excessive ground marking
Topper not following ground contours
correctly
Check lower lift arm to lift arm bracket
clearance. Adjust if necessary
Uncut material
Heavy crop
Reduce forward speed, or cut twice
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