voltage regultor vs cut out

jim warehime · Jul 8, 2012

What's a visual difference between the 2. Thanks jim.

rustyfarmall · Jul 8, 2012

(quoted from post at 09:27:03 07/08/12) What's a visual difference between the 2. Thanks jim.

Voltage regulator will have 3 or 4 posts on it. Cut-out relay usually has only 2. (I think)

John T · Jul 8, 2012

Cutouts are smaller and theres only one relay inside, most are 2 terminal, BAT and GEN while a few older ones may have a terminal for grounding the gennys Field. On most, however, the gennys Field wires to a LHBD light switch which regulates the rate of charge.

A VR is bigger and either 3 terminal (BAT FLD GEN) or 4 terminal (BAT LOAD GEN FLD) and the gennys field wires to it instad of the light switch.

John T From Estes Park, Colorado today

Jim Becker · Jul 8, 2012

The comments in the previous replies are generally true. However, the cut-out relays used on the letter series tractors were larger than the voltage regulators and had 3 terminals. The regulators usually have 4 terminals but one is usually under the regulator where the uninitiated might not find it.

The cut-outs were usually mounted directly on top of the generator and the regulators were not. If you take the cover off, the cut-out only has one coil/points assembly and a lot of empty space.

rustyfarmall · Jul 8, 2012

(quoted from post at 12:20:50 07/08/12) The comments in the previous replies are generally true. However, the cut-out relays used on the letter series tractors were larger than the voltage regulators and had 3 terminals. The regulators usually have 4 terminals but one is usually under the regulator where the uninitiated might not find it.

The cut-outs were usually mounted directly on top of the generator and the regulators were not. If you take the cover off, the cut-out only has one coil/points assembly and a lot of empty space.

I have the original cut-out from my 1940 H hanging on the wall. I sort of "let the smoke out of it", so I had to scrounge up a used replacement which has served me faithfully for 10 to 12 years now. Both of those cut-outs are identical in size to a voltage regulator. Up until maybe 1946 or 1947, maybe even later, the voltage regulators WERE mounted on top of the generator.

gene bender · Jul 8, 2012

ACs used the small cut-outs with only two terminals

Jim Becker · Jul 8, 2012

(quoted from post at 16:34:42 07/08/12) Up until maybe 1946 or 1947, maybe even later, the voltage regulators WERE mounted on top of the generator.

If you are talking about IH tractors of that vintage, those things on top of the generators were cut-outs, not regulators.

jim warehime · Jul 8, 2012

The tractor in question is a 40h. And whatever it is its on the generator. Jim.

CNKS · Jul 8, 2012

I didn't think the VR's showed up until about 1949, about the same time as the distributer became standard. My dad had a late 47 H with the 4 position switch and a cutout. I have a 48 C with a cutout and the 4 position switch.

gene bender · Jul 8, 2012

40 H if original would have been a three terminal cut-out. The Bs all had cut-outs even early Cs still had them until they went to a reg that was mounted underneath the gen. The Bs had the field term connected to the gen and a wire going to the 4 position sw on the steering pedestal for hi-charge.

gene bender · Jul 8, 2012

Theres a gen with cut-out off an H on EBAY showing the wires from the A term on the gen to the cut-out and Field on the gen going to the field term on the cut-out.

jim warehime · Jul 8, 2012

Looked at it earlier it has 3terminals on front 1 underneath and it looks like something on the back. Jim

gene bender · Jul 9, 2012

I-H used the Deloc Remy 1116766 cut-out on top of their gens with three terminals and they are larger than a reg gen term to A on the gen and F to the field on the gen with one screw holding the cap. Other tractor did use a small two post cutout but not I-H. I have several on my tractors and they have always worked fine.

voltage regultor vs cut out

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