Jet JAT-403 Operations & Parts Manual Download Page 10

10 

JAT-403 Angled Die Grinder 

 

Troubleshooting JAT-403, 90° Angle Die Grinder

 

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. 

Rotor vanes or other components 
are worn. 

Replace worn components. 
(Replace vanes as an entire set.) 

Throttle lever malfunction. 

Clean throttle lever mechanism to 
ensure free movement. Replace 
mechanism if needed. 

Bearing(s) worn. 

Disassemble and inspect bearing. 
Grease or replace as needed. 

Starts immediately as soon 
as air is connected without 
lever being pressed. 

Throttle valve malfunction. 

Inspect and repair throttle valve. 

Excessive or abnormal 
vibration. 

Improper lubrication. 

Lubricate properly according to 
instructions in this manual. 

Bearings worn. 

Disassemble and inspect bearing. 
Grease or replace as needed. 

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 at air 
inlet, o-rings, etc.  

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. 

Rotor vanes are worn. 

Replace vanes (entire set). 

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. 

Excessive heat develops 
in tool. 

Improper lubrication. 

Lubricate properly according to 
instructions in this manual. 

Summary of Contents for JAT-403

Page 1: ...Pneumatic 90 Angle Die Grinder 505403 JAT 403 Operation Parts Manual M 505403 Edition 2 06 2015 JET 427 New Sanford Road LaVergne TN 37086 Ph 800 274 6848 www jettools com Copyright 2015 JET ...

Page 2: ...ith any additional action needed JET has Authorized Service Centers located throughout the United States For the name of an Authorized Service Center in your area call 1 800 274 6846 or use the Service Center Locator on the JET website More Information JET is constantly adding new products For complete up to date product information check with your local distributor or visit the JET website How St...

Page 3: ...hromium from chemically treated lumber Your risk of exposure varies depending on how often you do this type of work To reduce your exposure to these chemicals work in a well ventilated area and work with approved safety equipment such as face or dust masks that are specifically designed to filter out microscopic particles 9 Do not operate an air tool continually at full throttle without a work loa...

Page 4: ...mproper accessories may be hazardous 31 Maintain tools with care Keep air tool clean and oiled for best and safest performance 32 Do not use combustible gases carbon dioxide oxygen or any bottled gas as an air source for the tool These can present risk of explosion and serious injury 33 Do not lubricate the tool with combustible liquids such as kerosene diesel or jet fuel 34 Do not dispose of this...

Page 5: ... forth in this document The instructions and warnings in this manual may not encompass all possible workplace environments The operator is expected to take appropriate precautions and exercise common sense As with any tool operation safety of operator and bystanders should be first priority If there are questions or comments please contact your local supplier or JET JET can also be reached at our ...

Page 6: ... Length 6 1 8 in 155 58 mm Housing material Aluminum Net weight 1 32 lb 0 60 kg Shipping weight 1 52 lb 0 69 kg 1 The specified values are emission levels and are not necessarily to be seen as safe operating levels As workplace conditions vary this information is intended to allow the user to make a better estimation of the hazards and risks involved only Specifications were current at time of pub...

Page 7: ...ade screwdriver 6 Grip tool with both hands and push safety lever forward to release throttle lever Gently press throttle lever 7 Release throttle lever to stop die grinder Maintenance Lubrication The die grinder should be lubricated daily or before each use with air tool oil through the air inlet During continual operation it should be re oiled every 1 to 2 hours This can be done with an in line ...

Page 8: ...g the air wrench is too small or the air compressor CFM is not powerful enough for the job Continued use in either capacity will cause damage to the tool Tool Pressure JET Air Tools operate on 70 to 100 psi pounds per square inch air pressure measured at the tool when the tool is operating Set tool to 90 psi unless indicated otherwise Pressure in excess of 100 psi will shorten the life of the tool...

Page 9: ...JET 9 Figure 2 Recommended arrangement of air piping and air line system ...

Page 10: ...n Lubricate properly according to instructions in this manual Bearings worn Disassemble and inspect bearing Grease or replace as needed 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 at air inlet o rings etc Moisture or obstruction in air hose Air supply must be...

Page 11: ...ollowing pages To order parts or reach our service department call 1 800 274 6848 Monday through Friday 8 00 a m to 5 00 p m CST Please have the stock number and serial number of your tool available when you call so that we may serve you quickly and accurately ...

Page 12: ...12 JAT 403 Angled Die Grinder 505403 JAT 403 90 Angled Die Grinder exploded view ...

Page 13: ... 16 52216 Rotor vane 4 17 30117NPN Spring pin 1 5x6 2 18 52218 Cylinder 1 19 52219 Front end plate 1 20 BB 608ZZ Ball bearing 608ZZ 2 Index Part No Description Qty 21 52221 Controller 1 22 52222 Pinion gear 1 23 52223 Front coupling 1 24 51224 Collet 1 4in 1 25 52225 Collet nut 1 26 52226 Front cap 1 27 52227 Double end wrench 2 28 JSM5252 28 Head 1 29 52229 Retaining ring 30 3x1 1 30 52230 Bevel ...

Page 14: ...14 JAT 403 Angled Die Grinder This page intentionally left blank ...

Page 15: ...JET 15 This page intentionally left blank ...

Page 16: ...16 JAT 403 Angled Die Grinder 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com ...

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