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Bench grinder 319.19062 capacitor wiring- old capacitor had red and black wire. New one has two grey wires. does it matter how they get hooked up relative to how the black and red ones got connected?

Bench grinder model number 319.19062 capacitor burned out. Had a one red and one black wire coming out. I kept track as to where each went. New capacitor has two grey wires. Does it make a different which wire gets connected to the respective locations of the old wires?

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Posted on Jan 02, 2017

SOURCE: older sears bench grinder wont run 1/3 hp model 397 19581

Can you get a replacement? If not, we could probably figure out some suitable substitute.

Charlie

Posted on May 31, 2009

torqueman200
  • 12 Answers

SOURCE: older sears bench grinder wont run 1/3 hp model 397 19581

I know this is an old post, but maybe it will help others looking for information.

I have the Craftsman 1/3-HP grinder models: 397.19580 & 397.19581.

They are Split-Phase single voltage (115 V), and use a Klixon start-up current style relay - 2CR14-224.

The relay is normally open. When the large starting current in the main/run winding circuit is sensed by the the relay coil (term 3 & 4) which is in series with the main winding, the relay contacts close (term 2 & 4).

The one end of the start-up winding is connected to the main coil's BLK wire in the coil pack.

When the relay contacts close the start-up winding is energized. The start-up coil is used to provide a boost to over-come the resting inertia of the rotor.

Once the rotor reaches between 65% - 75% of operating speed, the current through the main winding circuit is reduced to the point that the relay coil cannot over come the return-springs force, acting on the relay contact arm. With the contacts open, the start-up winding is no longer energized.

This should take about 2-3 seconds, if the relay malfunctions, the high current through the start-up windings (thin wires) may be damaged.

Here is a diagram I have made.
older-sears-bench-grinder-wont-run-1-3-z1zi3msqm0xxzvze3v341n5r-4-0.jpg

Klixon 2CR relays are no longer available.

You may find a suitable replacement here:
http://www.herbach.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=HAR&Product_

Posted on Feb 24, 2016

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1 Answer

Hi guys just wanting to know if you can tell me how to hook up power cord to bench grinder it is single phased .


the red wire (power--active-- wire) goes to one side of the switch
the other side will be red wire (power --active --wire) to the motor
the black wire is the neutral wire and will join directly to the black wire from the motor
the green/ yellow striped wire (ground /earth wire is screwed directly to the metal body of the grinder
IN some countries there are different color codes for active, neutral wires so get an electrician in to be safe

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Motor wiring diagram


A suppression capacitor has 2 wires and can be have red and black wire pair, and a motor have 2 wires from the electric field to the carbonbrushes and 2 other wires from the magnetfield goes to the switch and on the same wires can be connected a parallell suppresion capacitor connected bud in most cases its not needed in practice.
The other 2 wires have to come from the powercable on the switch the most grinders to find in shops are class 2 angle grinders with double insulation, But If this is an bench grinder there must be a class 1 cable used with 3 wires to earthing a metal point on the housing. look always for the 2 square symbol its class 2 and cable has 2 wires otherwise 3 .


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1 Answer

I have a 1/3 hp motor with a capacitor. There are four motor leads coming out of motor, the capacitor is mounted in the wiring box. This motor does not have a centrifugal switch, to isolate the capacitor...


I am in the process of replacing a capacitor on a Craftsman 6 in 1/3 grinder, 2.8 amp, single phase, 110v. Not sure on the centrifugal switch. model 319.190621, ser B9530. When I took the old one out the black wire from the capacitor went to the cluster of back wires (in my case 3) in the wire nut. The blue wire from the grinder went to red wire from the capacitor in a wire nut. Hope that helps you....

Maybe you can help me... the specs on the capacitor burned off when it failed. Can you tell me what the capacitor specs are on yours?

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1 Answer

I have a Cummins 1/2 hrs.bench grinder in pieces. 3 wires from the inside - Black, red, and blue. A capacitor with two male connectors on the end and a switch. How does it need to be wired?


The capacitor goes across the Line, terminals, of the Motor, The Black, should Be Neutral, the RED should be Power IN to the Switch, and the Blue, the "Other" side of the switch. The Capacitor, sometimes goes on the Spare (If any) Terminals of the "Cold" side of the Power Switch.
International color code is Red Positive or Phase, Blue, Phase or Positive, Black, usually Neutral, Negative .
The capacitor is a Suppression" capacitor,and is usually "Across the Motor terminals on "Cold" or "Switched" side of the circuit.
The circuit is simple, Neutral is "Common" the Power comes in to the Switch Contact, whereby the activation of said switch, joins the "Contacts" to the Phase. Positive, Wire to the "Motor". The "Other Terminal Wire from the Motor, goes to Common. The capacitor. Is installed in Parallel with the Phase and Neutral on the "Cold" or normally unpowered side of the circuit.

Mar 13, 2010 | Grinders

1 Answer

It hums but won't turn. are there brushes? what is the black canister hooked to wiring going to motor? aloha, chip


Hi Chip , have you tried !!carefully!! turning the grinding wheels whilst the grinder is powered up and humming and does this start the machine , if it does your motor start capacitor ( a cylinder/tube with 2 wires or connectors on it ) will be deffective or the leads might have became detached from it , a replacement capacitor is quite cheap but you must replace it with the exact one ( a motor start/run capacitor of the correct Mfd or uF rating typically 30 uF/Mfd and at the correct voltage 110/220V )
if this dosent fix your problem most likely your motor start windings in the motor field coils are burnt out and the grinder is uneconomical to repair .
hope this helps .

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2 Answers

Older sears bench grinder wont run 1/3 hp model 397 19581


I know this is an old post, but maybe it will help others looking for information.

I have the Craftsman 1/3-HP grinder models: 397.19580 & 397.19581.

They are Split-Phase single voltage (115 V), and use a Klixon start-up current style relay - 2CR14-224.

The relay is normally open. When the large starting current in the main/run winding circuit is sensed by the the relay coil (term 3 & 4) which is in series with the main winding, the relay contacts close (term 2 & 4).

The one end of the start-up winding is connected to the main coil's BLK wire in the coil pack.

When the relay contacts close the start-up winding is energized. The start-up coil is used to provide a boost to over-come the resting inertia of the rotor.

Once the rotor reaches between 65% - 75% of operating speed, the current through the main winding circuit is reduced to the point that the relay coil cannot over come the return-springs force, acting on the relay contact arm. With the contacts open, the start-up winding is no longer energized.

This should take about 2-3 seconds, if the relay malfunctions, the high current through the start-up windings (thin wires) may be damaged.

Here is a diagram I have made.
older-sears-bench-grinder-wont-run-1-3-z1zi3msqm0xxzvze3v341n5r-4-0.jpg

Klixon 2CR relays are no longer available.

You may find a suitable replacement here:
http://www.herbach.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=HAR&Product_

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1 Answer

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The capacitor is easy to change and can be matched once you remove it by any electronics parts house.

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