I have a ingersal rand 2141 3/4" impact the hammer frame had broken. It was replaced and

SOURCE: I need to find a rebuild kit

http://parts4tools.com/store/page6.html

SOURCE: electric impact wrench runs slow with no power

ALL Sears products have the replacement parts listed at;
http://www.searspartsdirect.com/partsdirect/index.action

Enter you model number and you will get a diagram and parts/price list.

The people at Sears should have known that. Sears also have free-standing hardware stores in many areas.

SOURCE: craftsman 1/2' impact gun

Use a good grease. Don't pack it, just lube the parts. If it is all together, put in about half an ounce of air tool oil through the plug.

SOURCE: I need copy of instructions for Ingersoll Rand

Follow this link:

http://www.irtechpubs.com/ir_pdfs/Tools/Impact%20Tools/Air%20Impactools/04584819_ed4.pdf

This is the manual for the 231C Impact Wrench.

There is a barrel that goes across the impact in the back, you can press this from right to left an vice versa. If the barrel will not move there may be damage inside and further inspection is necessary.

SOURCE: Runs fine in reverse, but will not run full speed

make sure the power /speed controll is set on high in both directions yes it can easily be rebuilt i can do it cheaper than most places, i have 30 years experience at fixing air tools - i worked for snap on tools also check and see that the front housing screws are equally tight.