McConnel SR460 - Troubleshooting

112
6 Troubleshooting
Symptom
Possi
ble Cause
Remedy
6.1 Irregular cut a) Worn, bent or broken
blades
Replace blades immediately.
 Raise cutting height to avoid striking objects
 Remove/avoid obstacles such as rocks
 Check rotor speed

Ensure
steady initial starting o
f
the mac
hi
ne
b) PTO input speed too
slow
Check PTO input speed and increase to maximum
indicated; see Section 2.5.1
c) Machine is not level to
the ground
Level the machine front to rear and left to right. See
Section 4.7.1 and Section 4.7.2
d) Clogged material due to
excessive ground speed
Reduce tractor speed over ground and check correct
PTO input speed
6.2 Machine
noise
a) Loose bolts Check and tighten to the correct torque. See Section
5.9
b) Damage to a fabrication
or cracks
Repair fabrication in specialised, approved workshop
or replace component with genuine part
c) Vibration See “Vibration” symptom heading below
6.3 Gearbox
noise
a) Lack of oil Fill to level mark on gearbox
b) Worn gears Replace gears with genuine McConnel part
c) Worn bearings Replace bearings with genuine McConnel part
6.4 Vibration! a) Lost/broken blades (see
6.5)
Replace all blades on that rotor
b) Bent gearbox rotor Replace gearbox shaft and seals
c) Worn gearbox bearings Replace bearings and seals
d) PTO speed too high Reduce PTO speed to the correct operating speed
6.5 Broken/dam
aged blades
a) Blades striked object Raise cutting height to avoid striking objects again
Remove/avoid obstacles such as rocks
b) PTO going too fast Reduce PTO speed to the correct operating speed
c) Blades sped up too
quickly
Ensure a steady engagement into driving the PTO
with a low tractor engine speed
d) Excess play in blade
mounting
Worn blades bushes. Bolts loose, tighten to torque
setting as stated in Section 5.9.
6.6 Damaged/w
orn blade
carrier
a) Blade carrier striked
object
Raise cutting height to avoid striking objects again
Remove/avoid obstacles such as rocks
b) PTO going too fast Reduce PTO speed to the correct operating speed
c) Blade carrier sped up too
quickly
Ensure a steady engagement into driving the PTO
with a low tractor engine speed
d) Excess play in blade
mounting
Worn blades bushes. Bolts loose, tighten to torque
setting as stated in Section 5.9
e) Failure to keep tight
centre retaining nut
Tighten nut and secure with split pin
6.7 Damaged
gearbox
a) Seized slip clutch Free slip clutch by following the guidance in Section
5.4.2 and reset clutch settings to the correct setting
following Section 5.4.3
b) PTO shaft telescopic
guard bottoming out
Shorten the telescopic following the guidance in
Section 3.3.4
c) Engaged PTO drive with
too much speed
Ensure a steady engagement into driving the PTO
with a low tractor engine speed
d) Lack of grease on sliding
tubes of drive shaft
Remove and split the PTO shaft following guidance in
Section 5.3 and grease the two halves
6.8 Gearbox
overheating
a) Incorrect oil level Fill to level mark on gearbox
b) Incorrect grade of oil Drain existing oil and refill using the correct grade;
see Section 5.2.1
c) Incorrect operating
speed
Operate the PTO speed at the correct speed as
stated on the decal on the splitter gearbox
d) Machine overloaded Reduce tractor/machine forward speed
e) Build-up of material
around the gearbox
Stop the machine. Being careful of heat, clear the
material around the gearbox