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JET  

11 

#505434, JAT-434, 4-inch Angle Grinder – parts list 

#  Part No. 

Description 

Qty 

1  JAT434-01 

Motor Housing 

2  JAT123-14 

Spring Pin 4x28 mm * 

3  SM-30103 

Air Inlet 

4  SM-61904 

Trigger * 

5  SM-61905 

Valve Stem * 

6  SM-61906 

Bushing * 

7  JAT450-07 

O-Ring, 4.9x2.2 mm *

8  SM-61908 

Valve Spring * 

9  JAT434-09 

Throttle Valve Housing 

10  SM-61910 

Throttle Lever Plug * 

11  JAT322-55 

O-Ring 9.8x2.4 mm *

12  JAT450-12 

Plunger * 

13  BB-608ZZ 

Ball Bearing 608ZZ * 

14  SM-61914 

End Plate 

15  JAT450-15 

Rotor 

16  JAT450-16 

Rotor Vane (set of 4) * 

17  JAT104-17 

Spring Pin 3x8L mm * 

18  SM-61918 

Cylinder * 

19  JAT741-19 

Front End Plate 

20  BB-6201Z 

Ball Bearing 6201Z * 

21  SM-61921 

Lock Nut * 

22  JAT450-22 

Bevel Gear * 

23  SM-61923 

Coupling Nut 

24  40309 

Screw TS2.9 

25  SM-61925 

Deflector 

26  JAT450-26 

Spacer 

27  SM-61927A 

Screw with O-Ring (#7,27) 

SM-61927 

Screw * 

28  BB-626ZZ 

Ball Bearing 626ZZ * 

29  JAT450-29 

C-Retaining Ring STW-10

30  SM-6

1930

 

Bevel Gear * 

31  JAT450-31 

Wave Washer 10 mm * 

32  BB-6202ZZ 

Ball Bearing 6202ZZ * 

33  SM-61933 

Spindle * 

34  JAT450-34 

Woodruff Key 3x13 mm * 

35  SM-61935 

Gasket * 

36  SM-61936 

Retainer * 

37  SM-61937 

Disc Cover 4in. * 

38  JAT450-38 

Flange 3/8”-24UNF * 

#

 

Part No.

 

Description

 

Qty

 

40  JAT450-40 

Flange Nut 3/8”-24UNF * 

41  JAT450-41 

Adjust Screw * 

42  JAT450-42 

Adjust Nut * 

43  TS-1502041  Socket Hd Cap Screw M5x16L*  4 
44  TS-2361051  Spring Washer 5 mm * 

45  JAT450-45 

Spring * 

46  JAT450-46 

Governor * 

47  JAT450-47 

Pendulum * 

48  40317-13 

Spring Pin 3x12L mm * 

49  JAT434-49 

O-Ring 37.8x1.78 mm *

50  SM-61950 

Torsion Spring * 

51  SM-61951 

Throttle Lever Lock * 

52  40337 

Spring Pin 3x18L mm * 

53  JAT434-53 

Spanner * 

54  JAT450-55 

Pin Wrench * 

55  SM-61955 

Handle 

56  52236 

O-Ring 10.5x1 mm *

SM-61904A 

Trigger Assembly - #4,50,51,52 

SM-61905A 

Valve Stem Assembly - #5,7 

SM-61906A 

Bushing Assembly - #6,56 

SM-61910A 

Throttle Lever Plug Assembly - 
#10,11 

SM-61921A 

Lock Nut Assembly - #21,49 

JAT4

34

-46A 

Governor Assembly -  
#12,41,42,45,46,47(6),48(2) 

JAT434-SA 

Spindle Assembly - 
#33,34,38,40 

JAT434-DCA 

Disc Cover Assembly - 
#35,36,37,43(4),44(4) 

JAT434-TLA 

Throttle Lever Assembly - 
#2,4,50,51,52 

JAT434-CA 

Cylinder Assembly - #17,18 

JAT434-PWA  Pin Wrench Kit - #53,54 

JAT434-RPK 

Repair Kit - 
#13(2),16(4),20,28,32,49 

JAT434-RBK 

Rebuild Kit - 
#5,7,8,11,13(2),16(4),20,22,28,
30,31,32,49,56 

* These parts are only provided in the larger kit or assembly.

Summary of Contents for 505434

Page 1: ...Pneumatic 4 Angle Grinder 505434 JAT 434 Operation Parts Manual M 505434 Edition 1 05 2019 JET 427 New Sanford Road LaVergne TN 37086 Ph 800 274 6848 www jettools com Copyright 2019 JET ...

Page 2: ...t securing the tooling in the retainer and placing the tip against the work surface 11 Do not operate air tool without its guards in place Do not modify the tool 12 Do not operate this tool while tired or under the influence of drugs alcohol or any medication 13 Adopt a comfortable posture with proper balance and maintain secure footing at all times Non slip footwear or anti skid floor strips are ...

Page 3: ...tive wheel If using a wire brush inspect for loose wires 36 Do not get oil or water on the grinding wheel 37 When operating grinder place grinding wheel against work surface immediately after starting 38 Use proper size grinding wheel that matches the tool s specifications Do not use unapproved flanges bushings to adapt a grinding wheel to the arbor 39 The grinding wheel RPM rating must be the sam...

Page 4: ...ual 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 web site www jettools com Record the serial number and purchase i...

Page 5: ...wer 1 93 dB A Sound pressure 1 82 dB A Speed settings Variable throttle lever Overall length 8 8 in 223 5mm Housing material Aluminum Net weight 4 lb 1 81 kg Shipping weight 4 96 lb 2 25 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 ...

Page 6: ...p 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 Figure 2 5 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 le...

Page 7: ...tions The hose should be just long enough to serve the working area Excessive hose length will cause pressure drop 2 Make sure air compressor supplies clean dry air at correct CFM for the tool 3 Set air pressure to 90 psi Excess air pressure and or unclean air will shorten the tool s life and may create a hazardous situation 4 Drain water from air compressor tank daily as well as any condensation ...

Page 8: ...traps at the compressor for the main distribution line Use moisture traps and in line oilers on each downline that is to be used for air tools See Figure 3 Place oiler as close to air tool as possible for best lubrication Lubrication Use a light oil containing rust inhibitors such as SAE 10 Many JET air tools have integral oil reservoirs which should be kept filled when in line oilers are not used...

Page 9: ...perly 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 ...

Page 10: ...T Please have the stock number and serial number of your tool available when you call so that we may serve you quickly and accurately Non proprietary parts such as fasteners can be found at local hardware stores or may be ordered from JET Some parts are shown for reference only and may not be available individually 505434 JAT 434 4 inch Angle Grinder exploded view ...

Page 11: ...ff Key 3x13 mm 1 35 SM 61935 Gasket 1 36 SM 61936 Retainer 1 37 SM 61937 Disc Cover 4in 1 38 JAT450 38 Flange 3 8 24UNF 1 Part No Description Qty 40 JAT450 40 Flange Nut 3 8 24UNF 1 41 JAT450 41 Adjust Screw 1 42 JAT450 42 Adjust Nut 1 43 TS 1502041 Socket Hd Cap Screw M5x16L 4 44 TS 2361051 Spring Washer 5 mm 4 45 JAT450 45 Spring 1 46 JAT450 46 Governor 1 47 JAT450 47 Pendulum 6 48 40317 13 Spri...

Page 12: ...thorized 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 State Law Applies This warranty gives you spe...

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