Correct 550 HD Sled P/N?

[LCARS]

Yet another project that I'm trying to bring to completion; my 550 ->575. I have the correct rear door cover but now the hard drive sled doesn't allow it to clip in. The release tab sticks out a bit too far for the rear door.

The P/N is 815-0446 Rev D, which as I understand it is correct. The original rear door is taking it easy in an undisclosed (to me) location, so I can't inspect for differences.

Is 815-0446 the correct sled for the 550?

 

[jhorvath911]

Looks like that is a carrier for a power Mac. I think the part number you want is 922-0621from the service source manual for the 520, 550, and 575. Ive found some sites that listed both part numbers together when they were selling them, but OWC has the 922 part number and shows 4 in stock for 1.99ea.

 

[jhorvath911]

Scratch all that I just pulled the drive out of my 575 that I have handy and it has 815-0446 REV B in it. So I don't know when they switched parts compared to the service source but I am fairly certain this one is original from the machine.

 

[LCARS]

@jhorvath911 Thank you! Wow, a 68k Mac part at OWC still and at a nice discount no less. The image on their site does look different from mine so its worth a try. Maybe the revision is part of the fitment?

Thank you for checking your machine. I appreciate that. I'll order it and let you know how it goes.

 

[jhorvath911]

I took apart another 575 this morning and it was using the 815-0446 REV C. The interesting thing I found was that this one was installed backwards compared to how it should be and it doesn't fit the machine if its installed in the correct direction. You have sent me on quite the goose chase haha

 

[jhorvath911]

Checked a 520 and 550 I had and they are also installed backwards. I know that at least some of these are original drives on original sleds for the machines.


Here’s a picture of what I mean, what looks like a release tab is at the front of the drive not the back.

 

[LCARS]

I think you've solved it, @jhorvath911 ! I would not have thought to install it backwards. Thank you for your efforts : )

Installing it this way has almost worked for me. The rear panel still won't close but its less of a gap than before. I might try adjusting the screws to see if that will give me to millimeters I need.