Help: Removing Mark IV Chassis from Combo

Pre Recto days. Boogie modified Fenders, Mark I-IV, Dual Calibers, etc

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SonVolt
Mark III
Posts: 309
Joined: Wed Feb 22, 2012 11:09 pm
Location: Huntsville, AL

Help: Removing Mark IV Chassis from Combo

Post by SonVolt » Fri Feb 15, 2019 4:54 pm

I'm trying to convert my Mark IV Combo to a Head (just got my new headshell from Mesa today) but I can't seem to get the chassis out. I've removed the 4 screws on the top, the fan, the reverb tank and removed all the power tubes. I've turned the amp upside down but the chassis doesn't want to wiggle out. The side of the chassis with the guitar input seem to be stuck. The other side seems ok and wiggles. Is there another mounting screw or something else i'm missing?

s-fresh
Mark III
Posts: 258
Joined: Sun Aug 21, 2016 5:23 pm
Location: Hardwood Heaven
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Re: Help: Removing Mark IV Chassis from Combo

Post by s-fresh » Fri Feb 15, 2019 6:03 pm

Sometimes the bottom of the faceplate gets stuck on the grill or foam. Sometimes they can get bound up on the shielding foil on the top of the cabinet at bit as well. I had another Mesa recently with wooden blocks glued onto the chassis on either side behind the faceplate and those had bonded to the cabinet somehow over time. Just wiggle it out slowly and it should come out. I've had better luck with the cab sitting normally, not upside down.

SonVolt
Mark III
Posts: 309
Joined: Wed Feb 22, 2012 11:09 pm
Location: Huntsville, AL

Re: Help: Removing Mark IV Chassis from Combo

Post by SonVolt » Fri Feb 15, 2019 6:21 pm

Thanks. I finally got it out. Just hand to manhandle it a bit. I guess something got bunched up towards the front.

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