Oil pressure switch

[Saucymynx]

Hello. Any of you know where the oil pressure switch on a 184 is located? I have looked high and low and can’t find it. There does appear to be a small plug in the housing of the oil filter, but it sure doesn’t look like a pressure switch and there’s no wire. Help! Thanks

[john2189]

Rear side of the Oil filter housing

[Eugene]

I let it crank for a few minutes and then release the key to the run position and it starts just fine. So it seems that the coil is not getting voltage with the key in the start position. The only other thing that I don’t know how it might relate is that the oil warning light doesn’t seem to work. It’s not really a big deal since it starts when I release the key.

Any of you know where the oil pressure switch on a 184 is located? I have looked high and low and can’t find it. There does appear to be a small plug in the housing of the oil filter, but it sure doesn’t look like a pressure switch and there’s no wire.

Sounds like someone replaced the oil pressure switch with a pipe plug. The oil pressure switch is in the same location as the oil pressure gauge is on a standard Cub.

[Saucymynx]

Thanks for the help! That explains why the oil pressure light dsoesnt worl!. The plug seems small - 1/2 inmch or less. Maybe the switch just seems bigger in the parts catalogue....

[john2189]

Probably 1/4 pipe thread

[Larry B]

Remove the panel covering the clutch on the side with the oil filter. I think the oil pressure sending unit screws through the firewall into the back of oil filter housing. I can go out and look for sure tomorrow

[mozer71]

This discussion is important. The base 154's just have a light which blinks , showing low oil pressure. When it goes out, that is supposed to be proper pressure but how would I know? I need a gauge telling me what is actual pressure. Mine is getting old and when put to the tasks, before a light blinks, I should know the oil pressure.

[Eugene]

This discussion is important. The base 154's just have a light which blinks, showing low oil pressure.

True to an extent. The oil pressure gauge takes about 5 or 6 psi oil pressure to open the switch, which disconnects/shuts off the blinking light. Engine off, oil pressure down, oil pressure switch is in the closed position.

Oil pressure switch is wired thru the dash light to the same wire feeding the tractor's distributor. The oil pressure switch shorts out the ignition points until the oil pressure is high enough to open the switch.

When the oil pressure is high enough to open the switch the dash light goes out and the engine starts.

[Larry B]

This discussion is important. The base 154's just have a light which blinks , showing low oil pressure. When it goes out, that is supposed to be proper pressure but how would I know? I need a gauge telling me what is actual pressure. Mine is getting old and when put to the tasks, before a light blinks, I should know the oil pressure.

It would be easy to install a tee for the sending units and have both the flashing dash light and also have an oil pressure gauge. Either an electric or mechanical gauge.

[Larry B]

Probably 1/4 pipe thread

Pretty sure it is 1/8" NPT.

[outdoors4evr]

I did exactly what Mozer & Larry suggested on my 184. Here are some pics.

Notice the Tee added so that I can keep the idiot light functional. I didn't want to punch new holes in my 184 so I used one of the existing holes to route a hard line to the gauge. There are probably more elegant ways to accomplish this, but using 1/8" brass was much more substantial than the tiny little lines most gauges use.

Here is a view from the front of the tractor. I had to cut off the mounting bolt of the gauge after threading on the nut. If I'd do it again, I would have used longer pipes so I didn't have to cut the mounting bolt. The mounting plate for the gauges is just a flat piece of steel with 2" holes punched. I used existing holes and new bolts, nuts, and lock washers to mount the plate.

[mozer71]

I thank You, Larry B and Eugene for this info. I interrupted but I think this will especially help Saucymynx .

[BigBill]

My int154 light is on when I turn the key to start. The light goes off when the oil pressure is up. It takes a few seconds after the engine starts.

If the engine has been sitting a long time I turn the engine over with out starting it till the oil pressure is up. I don’t like starting engines dry.

[Larry B]

I did exactly what Mozer & Larry suggested on my 184. Here are some pics.

Notice the Tee added so that I can keep the idiot light functional. I didn't want to punch new holes in my 184 so I used one of the existing holes to route a hard line to the gauge. There are probably more elegant ways to accomplish this, but using 1/8" brass was much more substantial than the tiny little lines most gauges use.
z_IMG_0751.JPG

Here is a view from the front of the tractor. I had to cut off the mounting bolt of the gauge after threading on the nut. If I'd do it again, I would have used longer pipes so I didn't have to cut the mounting bolt. The mounting plate for the gauges is just a flat piece of steel with 2" holes punched. I used existing holes and bolts to mount it.
z_IMG_0752.JPG

Nice! Hobbs meter and oil pressure gauge. Shoulda made the panel a little taller and added a voltmeter.

[Saucymynx]

I thank You, Larry B and Eugene for this info. I interrupted but I think this will especially help Saucymynx .

Yes - this is extremely helpful.. If this plays out as it sounds, replacing the plug in my oil filter housing with a functional switch should make my tractor start in the "start" position, vs in the "run" position as it is today. Thank you all! This has been vexing me for a year! I will update the group when i complete the work!