Gem DTI

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Mr Ron
Posts: 2126
Joined: Tue Dec 22, 2009 12:36 pm
Location: Vancleave, Mississippi

Gem DTI

Post by Mr Ron »

I have an old Gem DTI that gives erratic readings. What, if anything can I do to restore it's functionability; lube?
Mr.Ron from South Mississippi
John Hasler
Posts: 1852
Joined: Tue Dec 06, 2016 4:05 pm
Location: Elmwood, Wisconsin

Re: Gem DTI

Post by John Hasler »

I have a Gem 222 that I restored and use regularly. The most common problem is gum in the bearing near the tip. Clean it with solvent (I often use starting fluid for this sort of thing because it won't damage the paint on the dial) and lube *sparingly* with light oil. If that doesn't do it try flushing out the works (with a solvent that won't attack the paint). Don't lubricate. If that isn't it the needle may be dragging. That can sometimes be fixed by popping the bezel off and very carefully bending the needle. Don't try to remove the needle without a needle-puller (sort of like a gear puller for jewelers).
Mr Ron
Posts: 2126
Joined: Tue Dec 22, 2009 12:36 pm
Location: Vancleave, Mississippi

Re: Gem DTI

Post by Mr Ron »

Thank you. It seems to work fine in one direction, but not in the other; will try what you suggest.
Mr.Ron from South Mississippi
John Hasler
Posts: 1852
Joined: Tue Dec 06, 2016 4:05 pm
Location: Elmwood, Wisconsin

Re: Gem DTI

Post by John Hasler »

I assume you know about the little switch on the side that changes the direction.
Mr Ron
Posts: 2126
Joined: Tue Dec 22, 2009 12:36 pm
Location: Vancleave, Mississippi

Re: Gem DTI

Post by Mr Ron »

You assume correctly. When in one position, the readings are erratic. In the other position, it reads as it should.
Mr.Ron from South Mississippi
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