80160724
Edition 4
June 2009
www.irtools.com
© 2009 Ingersoll Rand Company
3955 Series Impact Wrench - Parts List
Item Part Description Part Number Item Part Description Part Number
1 Inside Trigger Handle Assembly 3955-A92 † 31 Reverse Lock Plunger Spring 4U-664-10
2 Grease Fitting 130SR-188 32 Exhaust Deector 3940-123
3 Trigger 3940-93 † 33 Exhaust Silencer 3940P-311
4 Trigger Pin 280-265 † 34 Hammer Case Gasket 3955-36
5 Throttle Valve Plunger 3955-302 35 Hammer Frame Assembly 2950-A703
6 Throttle Valve Assembly 2934-A50 36 Hammer Pin (2) 2950-704
† ‡ 7 Throttle Valve Seal 2934-159 37 Hammer (2) 2950-724
† 8 Throttle Valve Spring 834-51-5 38 1-1/2” Square Drive Anvil, Standard Length 2950-726
† ‡ 9 Air Strainer Screen 434-61 39 Hammer Case Assembly 3955-D727
10 Straight Inlet 845-565 40 Hammer Case Bushing 2950-541
† ‡ 11 Reverse Valve Seal R00BR-210 41 Hammer Case Cap Screw (4) 3955-105
12 Reverse Lever 3940-75 42 Dead Handle Bracket 3955-364
13 Reverse Valve 3955-329 43 Dead Handle 3940-48
† ‡ 14 Reverse Valve Bushing Seal 85H-167 44 Socket Retainer RR10020S
15 Handle Cap Screw (4) 3955-638 45 Spline Drive Anvil Assembly VW-1030
16 Motor Clamp Washer (2) MR-207 † 46 Socket Retaining Ball D04-280
† ‡ 17 Handle Gasket 3955-283 † 47 Plunger Retaining Pin 845-128
† 18 Rear Rotor Bearing 834-24 † 48 Retaining Plunger Spring 2940-231-5
19 Cylinder Dowel 2950-98 49 Retaining Ball Plunger 845-230
20 Rear End Plate 2950-12 50 Outside Trigger Handle Assembly 3955-A1
21 Cylinder 2950-3 51 Trigger 844-78
22 Rotor 3955-53 52 Trigger Pin 280-265
† ‡ 23 Vane Packet (set of 7 vanes) 2950-42-7 53 Throttle Valve Plunger 3955-302
24 Front End Plate 3955-11 (Item 50 also includes illustrated parts 2,
6, 7, 8, 9, 10 & 11)
† 25 Front Rotor Bearing TA-22A
26 Motor Housing Assembly 3955-A40 * Grease Gun R000A2-228
27 Warning Label for Impactools WARNING-2-99 * Tune-up Kit (includes illustrated parts 7, 8, 9,
11, 14, 17, 18, 23, 25, 28[2], 29[2], 30, 31, 33,
34, 46, 47 and 48)
3955-TK1† 28 Air Port Gasket Retainer (2) 2940-200
† ‡ 29 Air Port Gasket (2) R44H-210A
† 30 Reverse Lock Plunger 4U-663B
* Not illustrated.
† Indicates Tune-up Kit part.
‡ To keep downtime to a minimum, it is desirable to have on hand certain repair parts. We recommend that you stock one (pair or set) of each
part indicated by the mark (‡) for every four tools in service.
Parts and Maintenance
When the life of the tool has expired, it is recommended that the tool be disassembled, degreased and parts be separated by material so
that they can be recycled.
Tool repair and maintenance should only be carried out by an authorized Service Center.
Refer all communications to the nearest Ingersoll Rand Oce or Distributor.
Related Documentation
For additional information refer to:
Air Impact Wrench Safety Information Manual 04580916.
Air Impact Wrench Product Information Manual 80160716.
Manuals can be downloaded from www.irtools.com.