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JET   

 

Setup and Assembly 

Any missing parts or damage should be reported 
immediately to your JET

®

 distributor. Do not use a 

damaged tool. Read this instruction manual 
thoroughly for operation, maintenance and safety 
instructions. 

Box contents: 

1 Angle 

sander 

1 Dead 

handle 

1 Backing 

disc 

1 Disc 

nut 

1 Pin 

wrench 

Operation and parts manual  

1 Warranty 

card 

 

Operation 

 

The angle sander must be 

properly lubricated before operation. See 
“Lubrication” section. 

 

Figure 1 

1. 

Install dead handle into either side of tool. 

2. 

Push spindle lock button and hold. 

3. 

Thread the backing disc clockwise onto the 
spindle.  

4. 

Install disc nut and tighten with pin wrench. 

5.  Peel backing from abrasive disc (not 

provided) and press abrasive disc firmly to 
the backing disc, making sure it is centered. 

6. 

Remove protective cap from air inlet (Figure 
1). If an in-line oiler is not being used, add 4 
or 5 drops of air tool oil (not included) into the 
air inlet. 

7.  Blow out air line to remove any dirt or 

moisture, then connect air supply hose to 
tool. Set air pressure to 90 psi. 

IMPORTANT:

 Connecting a quick-change 

coupling directly to the tool is not 
recommended, as vibration may cause the 
connection to fail. Instead, add a leader hose 
and install any quick-change couplings 
farther down the line. 

8. 

Grip handle firmly, and place other hand on 
dead handle. Push throttle lock to release 
throttle lever.  

9. 

Gently press throttle lever. Pressure against 
throttle lever determines rotation speed of 
tool.  

10.  For best results, keep sander moving in 

overlapping motions while holding it against 
work surface. Do not force the sander, allow 
the tool to do the work.  

11.  Release throttle lever to stop sander. 

12.  To remove sanding disc, engage spindle 

lock and unscrew disc nut with pin wrench. 

Maintenance 

Lubrication 

The sander 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 oiler, or manually. If done manually, proceed 
as follows: 

1. 

Disconnect air hose from tool. 

2. 

Place 4 or 5 drops of air tool oil into air inlet. 

NOTE: Air tool oil not provided; it is available 
at most major hardware and tool stores. SAE 
#10 oil or sewing machine oil may be used 
as a substitute. Do not use detergent oil. 

3. 

Re-connect air. Run sander at low throttle 
without load for a few seconds to distribute 
the oil throughout tool. 

 

Summary of Contents for JAT-740

Page 1: ...Pneumatic 7in Angle Sander 505740 JAT 740 Operation Parts Manual M 505740 Edition 2 06 2015 JET 427 New Sanford Road LaVergne TN 37086 Ph 800 274 6848 www jettools com Copyright 2015 JET...

Page 2: ...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 Ce...

Page 3: ...romium 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 wi...

Page 4: ...er 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...

Page 5: ...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...

Page 6: ...verall Length 12 in 304 8 mm Housing material Aluminum with rubber grip Net weight 4 72 lb 2 14 kg Shipping weight 5 39 lb 2 44 kg 1 The specified values are emission levels and are not necessarily to...

Page 7: ...o the tool is not recommended as vibration may cause the connection to fail Instead add a leader hose and install any quick change couplings farther down the line 8 Grip handle firmly and place other...

Page 8: ...ool for the job Poor maintenance practices such as using excessive air pressure or air volume Improper or no lubrication Rule of Thumb If it takes more than 8 seconds to tighten or loosen a bolt or nu...

Page 9: ...the environment Your tool contains materials which can be recovered or recycled When its useful life has expired please leave tool at a specialized facility Figure 2 Recommended arrangement of air pip...

Page 10: ...al vibration 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 r...

Page 11: ...following 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...

Page 12: ...gle Sander 505740 JAT 740 7in Angle Sander exploded view 44 28 23 32 43 4 5 30 26 25 31 24 29 23 13 12 12 13 15 12 2 3 13 10 7 11 6 8 9 13 12 38 16 14 1 33 27 20 17 22 21 18 19 23 37 36 35 45 46 40 41...

Page 13: ...12L 1 23 BB 608ZZ Ball bearing 608ZZ 3 24 JAT741 24 Spindle 5 8 11 1 Index Part No Description Qty 25 JAT741 25 Retaining ring STW 16 1 26 JAT741 26 Wave washer WW 16 1 27 JAT740 27 Pinion gear 1 28 J...

Page 14: ...14 JAT 740 Angle Sander This page intentionally left blank...

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

Page 16: ...16 JAT 740 Angle Sander 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com...

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