8mm Forum: 9.5mm Specto gearbox rewind jam

This is topic 9.5mm Specto gearbox rewind jam in forum 9.5mm Forum at 8mm Forum.

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Posted by Vic Newey (Member # 5181) on October 20, 2017, 11:35 AM:

The projector has been working fine but for some reason the rewind now jams, I have the type with the spindle that you twist to rewind but now it locks the motor from running.
I guess there is something jammed in the gearbox but not sure how to approach it.

[ October 20, 2017, 02:52 PM: Message edited by: Vic Newey ]

Posted by Vic Newey (Member # 5181) on October 20, 2017, 02:52 PM:

I've removed the unit and unscrewed the gearbox cover but not opened it yet, it looks like it's got a paper gasket? looks like I need to take the front chain pulley off but so far the screw has proven stubborn. Can someone advise if there is a seal to break to open it?

Posted by Maurice Leakey (Member # 916) on October 21, 2017, 01:52 AM:

When was the gearbox last lubricated? It may just have dried up. Before you start dismantling, lift off the rewind key and insert some oil.
It's a thought.

Posted by Vic Newey (Member # 5181) on October 21, 2017, 11:25 AM:

Other than the rewind problem it runs perfectly Maurice and I followed someones advice here and already added a few drops of oil.
Turning the mechanism by hand is also very easy.
When I want to rewind and turn the little keyknob it just stops dead & I have to quickly turn it off to avoid damage to the motor

Posted by Maurice Leakey (Member # 916) on October 22, 2017, 03:09 PM:

Vic
The gearbox is a casting made from the notorious material called Mazac. If you try to take the cover off you will no doubt crack it and that's the end of your gearbox.
If forward running is working satisfactorily I suggest you use some other method of rewinding your films.

Posted by Vic Newey (Member # 5181) on October 23, 2017, 03:26 AM:

I already took that decision Maurice & decided not to open it and I've now fitted it back in, it's not worth the risk simply for rewinding when all else is working very well.

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