Arbortech AS175 - Troubleshooting

9
8. TROUBLESHOOTING
This fault diagnosis is intended for use by persons familiar with mechanical devices, and provides a basic
capability to maintain the tool. To correct the user serviceable faults, refer to the Maintenance section of this
manual. The more complex repairs as noted below, must be performed by an authorised service centre.
ITEM SYMPTOM CHECK/REMEDY
1 Motor overheating
• Verify that no cooling vents are blocked by debris, the operator’s hand or
other obstructions. Remedy or clean as required.
• Verify blades are not rubbing against each other with excessive force,
either at cutting edge or close to blade mounts.
• Blades may be worn and overheating. Replace as required.
• Check that belt tension is not excessive.
•
Check that bearings have not failed by removing plastic side cover and belt
and rotating both pulleys independently checking for roughness. The power
pulley should rotate easily and smoothly. The driven pulley should rotate
smoothly but will have a “springy” feel, wanting to stay in either of 2 positions.
• Verify that the motor housing is secure with the tool. If loose, refer to
authorised service centre immediately.
2
Noisy operation or
unusual vibration
• Blades loose -tighten blade mount bolts
• Blade failure - replace blade set
• Leaf spring failure - contact authorised service centre
• Bearing failure - contact authorised service centre.
• Gearbox failure - contact authorised service centre.
• Handle rubber mounts damaged or worn - replace.
4
One or both conrods/
blades loose, even when
mounting bolts tightened
• Leaf spring failure - contact ARBORTECH authorised service centre.
5
Tool running and blades
not moving
• Loose belt or broken belt- re-tension or replace as necessary.
• Worn belt - replace belt.
7
Blades continually
comming loose
• Check the blade bolt holes. If bolt holes are elongated replace blades
8 Worn pulleys • Contact ARBORTECH authorised service centre.
9
Slow cutting
performance
• Teeth worn, chipped or lost. Sharpen or replace blade.
• Belt slipping - see Symptom 4.
11
Blades continually
coming loose
• Check the blade bolt holes. If bolt holes are elongated replace blades.
12
Blades rubbing together
with excessive force
• Ensure the blades have the correct spacing. If not, remove the blades and
follow the blade gap setup procedure under heading 5. OPERATION, Fig 4.
• Ensure the hardness of the material is not excessive
13
Blade teeth chipped or
lost.
• Occurs occasionally if hard material is encountered, or if the “back side”
of teeth are impacted.
• Care not taken in setting tool down on teeth on hard surfaces or loose in
tool box.
• Worn blades will start to become hot in certain areas, causing teeth to de-
bond - replace blades.
• Material too hard.
14 Loose top handle. • Worn or damaged rubber Mounts - replace.
15 Blades “blueing”.
• Worn teeth - replace blades.
• Excessive force being used.
• Insufcient“sawing”motionbytheoperator.
• Material too hard.
• Blades rubbing together with excessive force
16
Blade mounting bolts not
tightening fully.
• Threads on bolts stripped - replace bolts not tightening.
17 Threads on tool stripped • Contact your ARBORTECH authorized service center.
18 Tool will not run.
• Check brushes are not damaged or excessively worn - replace
• Contact your ARBORTECH authorised service centre.