Harbor Freight Hammer Drill - Won't hold SDS Chuck?

[ps2cho]

So I bought this hammer drill. I need to use it to speed up old tile removal.
http://www.harborfreight.com/1-in-73-amp-heavy-duty-sds-variable-speed-rotary-hammer-69276.html

I purchased a set of SDS chisel pieces, but it's not working for some reason. The drill is moving back/forward, but the chuck piece isn't. It "snaps" into the tool, but still moves back and forward if I grab it, so its not engaging.

I've tried pushing hard on it and it doesn't go any further.

The manual says it takes SDS Plus. I looked on the packet of the chisels and it only says SDS.

Is that the reason? Am I overlooking something stupid here?

Unless that's normal, and it only "hammers" when the chuck is pressed against whatever its needed to hit?

 

[FigureItOut]

SDS and SDS Plus are compatible. It won't hit unless your bit is pushing on something, like concrete.

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[FigureItOut]

Also, I'm pretty sure that won't do hammer only mode. You can't turn off the rotation, so useless with chisels. Take it back if you haven't used it, and get this: http://m.harborfreight.com/1-18-in-10-amp-heavy-duty-sds-variable-speed-rotary-hammer-61882.html
I've had one for years, and it's been a decent tool for very infrequent use. Clean the grease reservoir when you get it and put some better grease in.

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[bcradio]

That will be slow going on the tile removal.

 

[SuzukiGS750EZ]

How big is the wall? Have you considered a dremel flush cut with a grout removal tool and a chisel and hammer? I'm guessing you wanted the cheap way out toll wise, but they make kits for reciprocating saws abs one of them is a power chisel.