Dewalt's DC901 is considered one of a handful of Dewalt drills that makes use of a self-tightening, Loctited chuck. Whether or not for higher or for worse, the character and design of this chuck eliminates the necessity for the chuck-screw that sits inside the middle of most strange drill chucks. As a result of this drill lacks that screw in favor of dab or two of Loctite, the chuck on the DC901 is just a little bit trickier to take away and exchange. Thoughts you, solely just a little bit trickier, and even much less so when you're armed with the appropriate steps.
To take away the chuck from Dewalt's DC901, you need to first make sure that the hammer drill itself is in all the suitable locations, positions, settings, and and so on. First, make sure the software is in low-gear. This can be a stronger torque gear that's merely higher fitted to the extreme wrenching the chuck is about to come across. Additionally, you will need to make sure the software is about to drill-mode, that the clutch is about at clutch setting "22," and that the drill-chuck itself is completely open. These few steps, whereas easy, are vitally necessary to the general course of and can actually make or break your means to take away the chuck from this specific hammer drill.
The subsequent step in eradicating the chuck from Dewalt's DC901 requires a vise or vise-like mechanism to clamp the hammer drill's chuck as you wrench on the physique of the device. If you do not have entry to this type of gear, it's suggested that you simply take the drill to a licensed restore store, or, no less than, borrow another person's. In case you do have entry this type of gear, tightly clamp the hammer drill-chuck (thoughts you, clamp simply the chuck and depart the physique of the DC901 totally free) into the vise. If, for one or one more reason, you want to keep away from any scratching or damage to the chuck, wrap a store rag round it earlier than clamping.
Utilizing simply your personal physique power, whip the drill in a counterclockwise course till the Loctite that secures this specific chuck breaks free. You'll hear a "pop" and you'll really feel a big lower within the general tightness of the chuck. If after a number of whips the Loctite stays persistently un-brocken, you'll be able to warmth it up with a heat-gun or blow-dryer. This could render the glue pliable sufficient to interrupt the seal extra simply.
When you hear that "pop," take away the DC901 from the vise and, utilizing counterclockwise twists, merely hand-twist the chuck from the drill. It ought to now simply take away with just a few full twists.
To reinstall a brand new chuck on the DC901 (the chuck's half quantity is 330075-90), merely dab a dob (actually, solely a small dob) of Loctite onto the hammer drill's threaded chuck shaft. Twist and hand-tighten the chuck onto the shaft in a clockwise movement. Permit the glue to set and safe to the threads for a minimum of one-hour earlier than utilizing your DC901 in any capability in any way. I reiterate, whereas it's sensible to permit the Loctite to set for as much as 24-hours, you should let it set for, at very least, one hour earlier than utilizing it.