JET
9
Troubleshooting JAT-821A Flux Chipper
Any disassembly of the tool should be done by qualified service personnel. For problems not addressed
below, contact JET technical service at 800-274-6846.
Problem
Possible cause
Remedy
Tool will not start.
Air valve closed or obstructed.
Open valve; clear any obstructions.
Dirt or gum deposits on
components.
Flush tool with gum solvent.
If problem persists, disassemble,
clean and lubricate internal parts.
Worn components.
Disassemble and replace worn
components as needed.
Throttle lever inoperable.
Clean throttle lever mechanism to
ensure free movement. Replace
mechanism if needed.
Starts immediately when
air is connected without
throttle lever being
pressed.
Throttle lever malfunction.
Clean throttle lever mechanism to
ensure free movement. Replace
mechanism if needed.
Excessive or abnormal
vibration.
Insufficient lubrication.
Lubricate with air tool oil according
to instructions in this manual.
Loss of power; erratic
action.
Low air pressure.
Verify compressor has proper CFM
rating for tool.
Check compressor regulator
setting; set air pressure to 90 psi.
Check for loose connections.
Moisture or obstruction in air
hose.
Air supply must be clean and dry.
Clean out air hose(s) and remove
any kinks or bends.
Improper size of air transmission
lines, hoses, fittings, or
couplings.
Use appropriate-sized air
lines/hoses.
Verify proper fittings/couplings.
Dirt or gum deposits on
components.
Flush tool with gum solvent.
Check and clean air filter on
compressor.
Clean external areas of tool. If
problem persists, disassemble,
clean and lubricate internal parts.
Excessive heat develops
in tool.
Insufficient lubrication.
Lubricate with air tool oil according
to instructions in this manual.
Worn components.
Replace components as needed.
Severe air leakage.
(Note: Minimal escape of
air is often normal for air
tools.)
Air valve obstructed or damaged.
Clean or replace.
Housing loose or damaged.
Tighten or replace as needed.
