mark vii start relay specs

Forum for Maintenance and Repair topics. Feel free to ask questions or contribute.

Moderator: admin

User avatar
JPG
Platinum Member
Posts: 35435
Joined: Wed Dec 10, 2008 7:42 pm
Location: Lexington, Ky (TAMECAT territory)

Re: mark vii start relay specs

Post by JPG »

Assuming oem wire colors, a wire from relay terminal 2 connects to power switch terminal 2.
The capacitor wire connects to relay terminal 1.

The yellow motor wire connects to relay terminal 5 as well as to both power switch terminals 5.

The relay coil is across terminals 2 and 5.

Relay terminal 1 is the contact terminal that IIRC is normally closed to terminal 2. If my recollection IS correct resistance between 1 and2 should measure 0 ohms.
╔═══╗
╟JPG ╢
╚═══╝

Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10
E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
luggw1
Bronze Member
Posts: 7
Joined: Wed Sep 18, 2019 6:46 pm

Re: mark vii start relay specs

Post by luggw1 »

So your saying I should ignore the installation instructions that came with the relay and basically hook it up just like the old one was connected, right? Actually, the relay instructions may be illustrating the same hook-up that's in the Shopsmith anyway. It kind of makes sense as I don't really know which wire is the motor start winding lead anyway and it looks like these relays are very similar in their design. I'll do a little more poking with my VOM and then hook it up and see what happens.

Thanks.
Bill Lugg
User avatar
JPG
Platinum Member
Posts: 35435
Joined: Wed Dec 10, 2008 7:42 pm
Location: Lexington, Ky (TAMECAT territory)

Re: mark vii start relay specs

Post by JPG »

luggw1 wrote:So your saying I should ignore the installation instructions that came with the relay and basically hook it up just like the old one was connected, right? Actually, the relay instructions may be illustrating the same hook-up that's in the Shopsmith anyway. It kind of makes sense as I don't really know which wire is the motor start winding lead anyway and it looks like these relays are very similar in their design. I'll do a little more poking with my VOM and then hook it up and see what happens.

Thanks.
Bill Lugg
Realize the MVII motor is reversible. The actual start winding wires are connected to the power switch terminals T9 and T5. The power switch connects them to terminals 2 And 5 on the switch.

I do not know what the mars relay instructions state.
╔═══╗
╟JPG ╢
╚═══╝

Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10
E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
Post Reply