oil pressure

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Rob in NH
10+ Years
10+ Years
Posts: 2521
Joined: Sun Oct 03, 2004 7:11 am
Zip Code: 03848
eBay ID: panelbeata
Tractors Owned: 1947 circle cub
1950 cub demonstrator
1957 cub
1967 cub
Circle of Safety: Y
Location: NH, Kingston

oil pressure

Postby Rob in NH » Sat Jun 02, 2018 5:08 pm

My 67 cub runs great but i noticed the oil pressure has dropped close to 0 when its hot. Its normal when running above idle. I use 15/40 oil. It has always seamed to run hot. Any ideas would be helpful. Thanks
Image

User avatar
Glen
5+ Years
5+ Years
Posts: 2764
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: oil pressure

Postby Glen » Sat Jun 02, 2018 6:01 pm

Hi,
IH used different oil pressure gauges on Cubs over the years. If the Cub has the 75 lbs oil pressure gauge, they can look sort of low, at least on the one I saw in use, because the Cub engine only has about 35 lbs oil pressure. So they only use about the lower 1/2 of a 75 lbs gauge pointer movement.
I think the guys on here have discussed that before.

They used a gauge that was 40 lbs before the 75 lbs gauge, I think. I don't know which gauge you have.

The experts on here have said that the Cub is a 35 lbs maximum oil pressure system.

Below are listings from TM Tractor showing the 2 gauges. :)

http://www.tmtractor.com/new/en/4876fp.htm

http://www.tmtractor.com/new/en/3291fp.htm
Last edited by Glen on Sat Jun 02, 2018 7:50 pm, edited 2 times in total.

Rob in NH
10+ Years
10+ Years
Posts: 2521
Joined: Sun Oct 03, 2004 7:11 am
Zip Code: 03848
eBay ID: panelbeata
Tractors Owned: 1947 circle cub
1950 cub demonstrator
1957 cub
1967 cub
Circle of Safety: Y
Location: NH, Kingston

Re: oil pressure

Postby Rob in NH » Sat Jun 02, 2018 6:09 pm

i have the 75# and at work speed it has at least 30 to 35# hot.
Image

mozer71
Cub Star!!
Cub Star!!
Posts: 271
Joined: Wed Apr 04, 2018 1:33 pm
Zip Code: 22650

Re: oil pressure

Postby mozer71 » Sat Jun 02, 2018 6:49 pm

This is SO important. Get as advised, another gage and verify. The 154 just has a lite and only tells there is pressure.
A friend had an AC B and found the oil pump tube had disconnected. Different engine/ OHV but still continued to run. He knew something was awry and removed the pan. There it was, laying in the pan. He fixed it and it ran well afterwards. Loss of pressure is Major issue for the engines will continue to their dieing day..

tst
5+ Years
5+ Years
Posts: 2950
Joined: Tue Jan 12, 2010 2:08 pm
Zip Code: 12514
Circle of Safety: Y

Re: oil pressure

Postby tst » Sat Jun 02, 2018 7:11 pm

Rob, check the oil pressure with a good mechanics oil pressure test gauge, they are better quality, check it when it is hot when your gauge says it is at 0 lbs. some have a nice long hose on it so you can put it on the tractor while using it so you can keep an eye on it
this way you know if you have a engine issue or bad gauge
Tim

Rob in NH
10+ Years
10+ Years
Posts: 2521
Joined: Sun Oct 03, 2004 7:11 am
Zip Code: 03848
eBay ID: panelbeata
Tractors Owned: 1947 circle cub
1950 cub demonstrator
1957 cub
1967 cub
Circle of Safety: Y
Location: NH, Kingston

Re: oil pressure

Postby Rob in NH » Sat Jun 02, 2018 9:45 pm

If its not a gauge problem what do you think it could be besides the oil pick up?
Image

staninlowerAL
5+ Years
5+ Years
Posts: 3565
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: oil pressure

Postby staninlowerAL » Sun Jun 03, 2018 9:14 am

Worn crank and rod/main bearings, oil pump worn out of spec.

outdoors4evr
10+ Years
10+ Years
Posts: 1480
Joined: Tue Jul 22, 2008 12:44 pm
Zip Code: 48370
Tractors Owned: 184
Location: Oxford, MI

Re: oil pressure

Postby outdoors4evr » Mon Jun 04, 2018 8:56 am

The oil pressure idiot light is supposed to blink when the oil pressure drops below 5psi.
This seems like a very low setpoint to me, but the manufacturer selected that value for a reason.
Per the manual recommendations, using straight 30 weight oil during the summer months may help.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller

staninlowerAL
5+ Years
5+ Years
Posts: 3565
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: oil pressure

Postby staninlowerAL » Tue Jun 05, 2018 4:08 am

I believe the original question was for a 67 Cub, with a gauge (no idiot light unless someone added one).


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: Gary Dotson, Scrivet and 7 guests