LumberJocks

1943 37 (34)-207 Jointer motor

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by pikewrench posted 10-07-2016 12:59 PM 289 views 0 times favorited 5 replies Add to Favorites Watch
View pikewrench's profile

pikewrench

2 posts in 65 days


10-07-2016 12:59 PM

I have owned this jointer since the mid 70s. I have been having a problem with it starting. It has an old Delta 1/2hp, 7.5 a motor. I pulled it apart and cleaned out the years of accumulation of wood dust and cleaned the armature and field. Reassembled it and plugged it up and it ran great. Shut it off and tried a restart-it will only turn slow and will not wind up if i help spin the shaft. The capacitor is an old cardboard tube type that appears to be an original and it appears to have an area saturated with the inside lubricated (yes I know that it probably contains PCBs). It has a 107-129 capacitor which I am finding that they are extremely proud of.
cheapest I have found is 38 bucks plus shipping. I believe that a 108-130 will work and will fit in the designates holder. Since I am not an electrician I want to be sure of this change. I would hate to destroy this old motor as it by far looks better manufactured than any thing you could buy today.

Thanks
Rick


5 replies so far

View Bill White's profile

Bill White

4458 posts in 3428 days


#1 posted 10-07-2016 04:02 PM

Take the old cap to a motor rewind/repair shop for a replacement. They are not exotic.
Bill

-- bill@magraphics.us

View MrUnix's profile

MrUnix

4245 posts in 1666 days


#2 posted 10-07-2016 08:01 PM

The 108-130mfd capacitor will work just fine.

Cheers,
Brad

PS: If you get a higher voltage capacitor (like 220-250v), it will last longer than one rated for 125v. Just an FYI.

-- Brad in FL - To be old and wise, you must first be young and stupid

View pikewrench's profile

pikewrench

2 posts in 65 days


#3 posted 10-08-2016 04:21 AM

Thanks for the help, The fact that the old capacitor is old and 125 volt rated and lasted this long. I just didn’t want to put the fields or windings in jeopardy in this old motor. All the connecting wiring is braided cloth (maybe asbestos) and in real good condition. The areas of the motor had a lot of wood dust and small shaving, the armature had a black coating that looked like resin. Thanks again

Rick
Soddy Daisy, TN

View martyoc's profile

martyoc

27 posts in 384 days


#4 posted 10-08-2016 02:00 PM

I had a similar problem on my table saw motor. The problem wasn’t the capacitor, but the points on the starter switch in the motor. Once in a while I have to open the motor and clean the switch points and then it works as its supposed to. Its takes about an hour to remove the motor from the saw, open and clean it, reassemble and get back to work.

-- Marty O'C

View thor2015's profile

thor2015

40 posts in 709 days


#5 posted 10-09-2016 06:20 PM

General rule regarding capacitors is that you want to preserve your capacitance (farad rating). The voltage rating is more forgiving but you want to make sure that you find a capacitor that is the same voltage rating as the one you have or higher. NEVER go lower.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com