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SKU 93900

For technical questions, please call 1-800-444-3353.

Page 7

Replacing the Drill Bit

1.

Disconnect the air line from the Air Drill.

2.

Press and hold the Trigger (12) to release any remaining air.

3.

Unscrew the Lock Nut (47) by turning it counterclockwise and slide it up and
over the Arm (50).

4.

Grab the Arm (50) and turn it side to side while pulling it up and off the Housing
(1).

5.

Using the Hex Wrench (57), loosen the Set Screw in the Supporter (45), then pull
out the Drill Bit (46).

6.

Replace the Drill Bit and retighten the Set Screw on the flat surface of the Drill
Bit.

7.

Replace the Arm (50).

8.

Replace the Lock Nut (47) by turning it clockwise over the Housing (1). Securely
tighten Lock Nut.

Parts List

Item Description 

Qty 

Item Description Qty 

1 Housing 

1  31. Retaining 

Ring 

(S22) 

1. A 

Ball (

 6.35mm) 

32. 

Ball Bearing (R8) 

2. 

Pin (

 3x27.8) 

1 33. 

Gear 

Cage 

5. O-ring 

(3.9x2.25x2) 

1  34. Gear 

7. 

O-ring (

 3.5x1.5) 

1 35. 

Pin (

 3x17.8) 

8. Valve 

Stem 

1  36. Washer 

9. 

O-ring (P14) 

37. 

Ball Bearing (R6zz) 

10. 

Valve Bushing 

38. 

Internal Gear 

11. Spring 

1  39. Bit 

Holder 

12. 

Trigger 

40. 

Set Screw (M5x5) 

13. 

Set Screw (M4x4) 

41. 

Set Screw (M4x6) 

14. 

Ball Bearing (696zz) 

42. 

Housing, Supporting 

15. 

Set Screw (M3x12) 

43. 

Spring 

16. 

Rear End Plate 

44. 

Retainer 

17. 

O-ring (

 33.05x1.78) 

1 45. 

Supporter 

18. Rotor 

Blades 

5  46. Drill Bit (

 8) 

19. Rotor 

1  47. Lock 

Nut 

20. Cylinder 

1  48. Retaining 

Ring 

21. 

Ball (

 5) 

1 50. 

Arm, 

inch 

22. 

Ball Bearing (608zz) 

51. 

Screw (M4x8) 

23. Spring 

1  52. O-ring 

(P18) 

24. 

Clamp Nut 

53. 

Muffler Nut 

25. Gear 

Case 

1  54. Muffler 

26. Gear 

Housing 

1  55. Muffler 

Retainer 

27. Spring 

2  56. Air 

Inlet 

28. 

Ball (

 4) 

2 57. 

Hex 

Wrench 

29. Adjustment 

Wheel 

1  58. O-ring 

30. Wave 

Washer 

(6200)  2 

   

 

 

NOTE

: Some parts are listed and shown for illustration purposes only and

are not available individually as replacement parts.

Summary of Contents for 93900

Page 1: ...www harborfreight com Copyright 2006 by Harbor Freight Tools All rights reserved No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools For technical questions and replacement parts please call 1 800 444 3353 93900 Due to continuing improvements actual product may differ slightly from the product ...

Page 2: ...e the risk of personal injury and damage to equipment Read all instructions before using this tool 1 Disconnect air before servicing Do not attempt to disassemble or service tool with air hose attached 2 Use only specified operating air pressure Never operate tool above the specified operating air pressure range 3 Compressed air only Use clean dry regulated compressed air between 70 and 100 PSI Ne...

Page 3: ...ool periodically and if damaged have them repaired by an authorized technician The handles must be kept clean dry and free from oil and grease at all times 16 Remove adjusting keys and wrenches Check that keys and adjusting wrenches are removed from the tool before operating 17 Stay alert Watch what you are doing use common sense Do not operate any tool when you are tired 18 Replacement parts and ...

Page 4: ...itions and situations that may occur It must be understood by the operator that common sense and caution are factors which cannot be built into this product but must be supplied by the operator Unpacking When unpacking check to make sure that all the parts are included Refer to the Parts List and Parts Diagram at the end of this manual If any parts are missing or broken please call Harbor Freight ...

Page 5: ... shank of the Drill Bit 46 Operation Controls and Adjustments Arm 50 Drill Bit 46 Supporter 45 Adjustment Wheel 29 Trigger 12 Air Inlet 56 Muffler 54 Retaining Ring 48 Lock Nut 47 Drilling a Spot Weld 1 Push in on the Supporter 45 and verify that it lines up with the top of the Drill Bit 46 2 Measure the height of the spot weld to be drilled Turn the AdjustmentWheel 29 so that the distance between...

Page 6: ...l Bit to continue further the drilling is complete If part of the spot weld remains turn the Adjustment Wheel 29 to allow the Drill Bit to drill deeper and repeat steps 5 to 8 9 When finished drilling turn the compressor off and remove the hose connection to the Air Drill 10 Press and hold in the Trigger 12 to release any air remaining in the Air Drill Maintenance 1 After each use wipe the Air Dri...

Page 7: ...l Bearing R8 1 2 Pin 3x27 8 1 33 Gear Cage 2 5 O ring 3 9x2 25x2 1 34 Gear 2 7 O ring 3 5x1 5 1 35 Pin 3x17 8 2 8 Valve Stem 1 36 Washer 1 9 O ring P14 3 37 Ball Bearing R6zz 1 10 Valve Bushing 1 38 Internal Gear 1 11 Spring 1 39 Bit Holder 1 12 Trigger 1 40 Set Screw M5x5 1 13 Set Screw M4x4 1 41 Set Screw M4x6 1 14 Ball Bearing 696zz 1 42 Housing Supporting 1 15 Set Screw M3x12 1 43 Spring 1 16 ...

Page 8: ...he merchandise If our inspection verifies the defect we will either repair or replace the product at our election or we may elect to refund the purchase price if we cannot readily and quickly provide you with a replacement We will return repaired products at our expense but if we determine there is no defect or that the defect resulted from causes not within the scope of our warranty then you must...

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