Model #900271040 CRAFTSMAN Drill Driver

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Question and Answers

Q:

How to remove the chuck on a Craftsman, model 900.271040, electric drill. There is no screw in the chuck.

A:

The parts diagram shows the chuck is mounted to a 3/8 inch shaft with threads. You will need to lock the rotor and unscrew the chuck. We don't have information if the threads are right handed or left.

You might need to separate the case and hold the rotor by hand to unscrew the chuck.

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Jimmy K -
Sears Technician
July 15, 2009
A:

I replaced mine. The threads are standard (right-tight) threads. I used a torx-head bit to disassemble the drill housing (comes apart in two halves). I lifted the chuck out and used a pair of pipe wrenches to unscrew the chuck from the drive shaft. I used an old sock to try to protect the largest gear (which I clamped in one wrench), and grabbed the textured chuck body with the other. Once off, I realized that the new chuck would need a spacer to prevent it rubbing on the plastic housing when tight. A standard washer with a 3/8" hole is slightly too large in diameter. I placed two in a drill jig to reduce the diameter with sandpaper. Two washers, then the drill chuck (mine was a 10mm 3/8-24 mount, 3/8" cap.)

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craig -
April 17, 2013
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Q:

need repair manual for old(1989)craftsman 3/8 variable reversible drill

A:

Hello, I would love to assist you but we're going to need the full model number of the craftsman drill. You can just add it to this tread so the expert will read the model number. Thank You!!!!

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Raquel F -
August 04, 2010
A:

Thank you for your question.

  • Since you have not provided the model number of the drill I can only give you some possible solutions.

  • I do not know of any repair manuals available for this type of tool.

  • The variable speed dial piece on your drills variable switch could be the link pin that as you pull the trigger it operates the variable control with in the switch. Since these switches do not have parts breakdown and are replaced as a complete component I can only give you a general answer. If you look on the switch carefully you should be able to find the location where this pin/part will fit into the switch housing.

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Sam A -
Sears Technician
August 05, 2010
A:

the model number on the craftsmaN 3/8" VARIABLE SPEED REVERSING DRILL is 900.271040. The piece in question looks like the letter "T" but the top of the "T" has three prongs on either side. I've looked carefully and still con't see where it may belong. I have the owners manual but it does not break down the componants of the trigger housing. I believe that it belongs inside the box which houses the contacts that are actuated whin the trigger is pulled but I can't see any obvious wear marks in the housing so that would imply that is is in a static position and is contacted bny some other moving part.

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middamaglu -
August 06, 2010
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