. Railway mechanical engineer . obtained by turning the long screw in Frame Bolt Puller The manual labor involved in driving out frame bolts bymeans of a punch and sledge hammer is well understood byall who have had occasion to remove bolts in this way. An-other old practice in removing bolts and one which obtainseven now in some shops is to shoot them out by means of agun and powder. This method is more or less dangerous,however, and for that reason usually necessitates waitinguntil after working hours. A device which has proved valuable in pulling frame bolts,particularly in difficult places
. Railway mechanical engineer . obtained by turning the long screw in Frame Bolt Puller The manual labor involved in driving out frame bolts bymeans of a punch and sledge hammer is well understood byall who have had occasion to remove bolts in this way. An-other old practice in removing bolts and one which obtainseven now in some shops is to shoot them out by means of agun and powder. This method is more or less dangerous,however, and for that reason usually necessitates waitinguntil after working hours. A device which has proved valuable in pulling frame bolts,particularly in difficult places where it would be almost im-possible to swing a sledge hammer and where it would bedangerous to operate a gun, has been developed. This deviceis shown ready for operation in Fig. 1 and is said to requireonlv approximately two minutes to set up and pull a bolt. The operation of the device will be readily understoodfrom an examination of Fig. 2. Two short rugged arms withmserted hardened jaws A are connected loosely by means of. Fig. 1—View of Bolt Puller Set Up Ready for Operation sleeve F. The long screw is turned by an air motor and ar-rangements should be made for reversing the motor so thatthe screw can be backed out readily. One of the saddles Cis applied over the head of the bolt to be pulled and trans-mits the pressure from the cylinder to the engine frame.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
