Hasselblad 500 C/M slips upon advancing film

[john_rogers3]

twice the following has happened with my recently rebuilt 500 C/M,

I go to advance the film to next shot, and the gear that connects from

body to film back gear actually slips!!!!! I can feel the sudden lack of

resistance in the crank, and then the crank siticks half way thru cycle.

everythng is jammed. I was able to hand wind the film and take out the

film without exposing the shots that were successful, then the crank spins

making a weird sound, not connected to the gear in film back, so at least

I could take off the lens, but i cannot get the film back off, that mechanism

from body is totally jammed. anyone ever had this happen to you? what causes

it, is it a part inside \body that needs replacement? this is most discouraging

to say the least. how can i get the film back off of the worthless body so i

can send it in for repair?? thanks for your help, everyone!! john

[john_rogers3]

lastly, the two times this happened was with two different film backs, so i

think that rules out the film back being the problem. everything seems tight

with my second body. john

[michael_heal]

<p>You don't say who rebuilt your 500CM, but if it was Hasselblad, I am sure they will stand behind their work. Take it back and they will repair it---likely at no charge as long as they performed the repair recently, as you say.</p>

[russell_britt]

I have learned the hard way, Only send Hassey Equipment to hassey in New Jersey!Then it will work great,and be reliable for years.

[john_rogers3]

the person who rebuilt the body is Ernst Weegan, factory trained and certified

hasselblad tech

for 40 + yrs,one of only a handful in america. i think he basically knows what

he is doing, but i think perhaps

there is something he missed. we are all human, arent we?? i talked to him

and several others today, and

nobody has ever heard of such a slip happening. it is really a scarey thing.

so i sent it back to him wiht the back that was on at the time this happened.

can we limit responses to what may have caused the problem? thanks, john