Spearhead AGRICUT
240 Offset
31
Shear Bolt Protection
The PTO shaft is fitted with a shear bolt overload
protection to prevent damage to the machine if an
obstacle is encountered during operation. The
shear bolt is located at the machine end of the PTO
shaft.
The procedure below should be followed when replacing or inspecting the shear bolt.
Inspecting and/or Replacing the Shear Bolt
o
Disengage the PTO.
o
Park up and lower the machine on a firm level site.
o
Switch off the tractor, apply the parking brake and remove the starting key.
o
Release the PTO guard restraining chains and disconnect the PTO shaft from
the tractor end first, and then from the machine; this will now give access to the
shear bolt for inspection and replacement.
o
Inspect the machine, shaft and work area for possible causes of failure. Check
that the blades rotate freely and are not fouling on the body.
o
Remove any bolt remains from the universal joint, and replace the shear bolt
with the correct grade replacement. Tighten the bolt to the correct torque
setting.
o
Re-connect the shaft to the machine and then to the tractor and attach the
guard restraining chains.
o
Re-
start the machine using the same procedure as for ‘Running the Machine for
the First Time’ to check that it operates correctly.
Only use the same size and grade of shear bolt as originally supplied with the
machine
– refer to the parts manual for genuine replacements.
NOTE: Four spare shear bolts and nuts are supplied with the machine; there are to be
found on the top of the ‘A’ frame assembly.
Shear bolt location >
