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oil pressure testing
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- CaperKen
- 5+ Years
- Posts: 49
- Joined: Fri Nov 04, 2016 8:20 am
- Zip Code: B0E3A0
- Skype Name: ken.dealmpr
- Tractors Owned: 1948 Farmall Cub (sn 26136), named Rosalie
- Location: Cape Breton, Canada
oil pressure testing
I've finally gotten my '48 Cub running again, but the oil gauge registers no oil pressure.
I changed the oil and filter. I squirted oil through the hole in the oil filter housing and mostly filled the oil filter housing before adding the remainder of the oil and starting the engine. The engine sounds great.
I disconnected the nylon tube from the oil filter housing to the oil pressure gauge and cleaned it. I poked a wire through the hole where that tube is attached to the oil filter housing to clean it. Still no oil pressure and no oil going through the nylon tube.
Prior to the new filter and oil, I had removed the old filter, squirted oil into that hole and put the lid on the housing but not fully firm -- the gasket was not in good shape. When I started the motor, lots of oil was pushed out of the oil filter housing lid so it seems like oil is being pumped.
So how can I check to see if I have enough oil pressure without dismantling the engine? I've read the posts that discuss the oil galley plugs in the engine. Is there any test I can do without opening the engine to check those plugs?
I changed the oil and filter. I squirted oil through the hole in the oil filter housing and mostly filled the oil filter housing before adding the remainder of the oil and starting the engine. The engine sounds great.
I disconnected the nylon tube from the oil filter housing to the oil pressure gauge and cleaned it. I poked a wire through the hole where that tube is attached to the oil filter housing to clean it. Still no oil pressure and no oil going through the nylon tube.
Prior to the new filter and oil, I had removed the old filter, squirted oil into that hole and put the lid on the housing but not fully firm -- the gasket was not in good shape. When I started the motor, lots of oil was pushed out of the oil filter housing lid so it seems like oil is being pumped.
So how can I check to see if I have enough oil pressure without dismantling the engine? I've read the posts that discuss the oil galley plugs in the engine. Is there any test I can do without opening the engine to check those plugs?
-
- 10+ Years
- Posts: 5208
- Joined: Tue Jan 12, 2010 2:08 pm
- Zip Code: 12514
- Circle of Safety: Y
Re: oil pressure testing
the factory op gauge screwed directly in to the housing, no nylon tube, sounds like it has been modified so start by using a different gauge
- Bill V in Md
- 10+ Years
- Posts: 1124
- Joined: Sun Feb 02, 2003 6:51 pm
- Zip Code: 21228
- Tractors Owned: 1948 Farmall Cub
LT1045 Cub Cadet - Circle of Safety: Y
- Location: MD, Catonsville
- Contact:
Re: oil pressure testing
You can check the gauge with air pressure and the proper fitting.
Bill VanHooser
Cub 54 Blade, Cub 193 Moldboard Plow, Cub 28A Disc Harrow
Cub 54 Blade, Cub 193 Moldboard Plow, Cub 28A Disc Harrow
- Glen
- 10+ Years
- Posts: 6140
- 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 testing
Hi,
They have said on here that if a plug inside the engine is missing, there would be no oil pressure.
You may just have a problem with no oil flowing through the small line to the oil gauge.
Loosen the connection at the oil gauge, to let the air out, and see if it will pump oil through the line.
Then tighten the fitting if oil comes out.
You could screw the oil gauge in the oil filter housing, where Cubs originally have the oil gauge, and see if it registers oil pressure.
Test the oil gauge like Bill said above, would be good.
They have said on here that if a plug inside the engine is missing, there would be no oil pressure.
You may just have a problem with no oil flowing through the small line to the oil gauge.
Loosen the connection at the oil gauge, to let the air out, and see if it will pump oil through the line.
Then tighten the fitting if oil comes out.
You could screw the oil gauge in the oil filter housing, where Cubs originally have the oil gauge, and see if it registers oil pressure.
Test the oil gauge like Bill said above, would be good.
- CaperKen
- 5+ Years
- Posts: 49
- Joined: Fri Nov 04, 2016 8:20 am
- Zip Code: B0E3A0
- Skype Name: ken.dealmpr
- Tractors Owned: 1948 Farmall Cub (sn 26136), named Rosalie
- Location: Cape Breton, Canada
Re: oil pressure testing
Thanks, Glen. I had done what you suggested but no good result.
The gauge that I have is of a size that won't allow fitting in the oil filter housing. I've just ordered a new gauge.
The gauge that I have is of a size that won't allow fitting in the oil filter housing. I've just ordered a new gauge.
- CaperKen
- 5+ Years
- Posts: 49
- Joined: Fri Nov 04, 2016 8:20 am
- Zip Code: B0E3A0
- Skype Name: ken.dealmpr
- Tractors Owned: 1948 Farmall Cub (sn 26136), named Rosalie
- Location: Cape Breton, Canada
Re: oil pressure testing
Does anyone have an oil pressure gauge in their dashboard that is connected to the oil filter housing by a narrow diameter nylon tube that works?
-
- 501 Club
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- Joined: Sun Nov 10, 2019 5:14 pm
- Zip Code: 29848
- Tractors Owned: Yanmar YM2000
Yanmar YM186 (non running)
1952 Farmall Cub - Circle of Safety: Y
- Location: Greenwood County SC
Re: oil pressure testing
CaperKen wrote:Does anyone have an oil pressure gauge in their dashboard that is connected to the oil filter housing by a narrow diameter nylon tube that works?
I'm sure someone does. It's just fittings and tubes. As long as your plumbed right and your gauge is not broken it will work.
-
- 10+ Years
- Posts: 4988
- Joined: Fri Oct 29, 2010 11:34 pm
- Zip Code: 36558
- Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '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, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
- Circle of Safety: Y
- Location: AL (Southwest)
Re: oil pressure testing
CaperKen wrote:Thanks, Glen. I had done what you suggested but no good result.
The gauge that I have is of a size that won't allow fitting in the oil filter housing. I've just ordered a new gauge.
I am interested in the results obtained by using a gauge installed in the filter housing vs one remotely installed. IMHO, the fact that the C60 cub engine is a low oil pressure system by today''s standards (not to mention that operating oil pressure is lower in a worn engine) leads me to believe that there is pressure loss between the filter housing and the remote gauge. (Think about loss of water pressure when connecting extended lengths of hoses.)
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)
-
- Team Cub
- Posts: 17272
- Joined: Sun Feb 02, 2003 2:59 pm
- Zip Code: 55319
- Circle of Safety: Y
- Location: MN
Re: oil pressure testing
staninlowerAL wrote:I am interested in the results obtained by using a gauge installed in the filter housing vs one remotely installed. IMHO, the fact that the C60 cub engine is a low oil pressure system by today''s standards (not to mention that operating oil pressure is lower in a worn engine) leads me to believe that there is pressure loss between the filter housing and the remote gauge. (Think about loss of water pressure when connecting extended lengths of hoses.)
The size of the tube shouldn't matter. The amount of oil flow is essentially none, so there will not be a measurable loss of pressure from one end of the tube to the other.
-
- 5+ Years
- Posts: 157
- Joined: Sun Sep 30, 2018 3:09 pm
- Zip Code: 06482
- Circle of Safety: Y
Re: oil pressure testing
high school kid that has installed a remote gauge in the dash... a little lag in pressure changes from 4-5 feet of tubing but the pressure will be accurate. It’s a closed system. As accurate as the gauge anyway.
C
C
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- 5+ Years
- Posts: 73
- Joined: Sat May 14, 2016 9:35 am
- Zip Code: 46723
- Tractors Owned: 1948 Cub
1935 JD "B"
Kubota BX2380
-
- 5+ Years
- Posts: 129
- Joined: Mon Sep 04, 2017 11:12 am
- Zip Code: 01007
- Tractors Owned: 49 Cub,57Cub, 57 Low Boy, 48 BN, 48 Ford8N, 49Ford 8N, 56 Massey Harris 50, 58 MF 65, 77 MF 265
- Circle of Safety: Y
- Location: Belchertown, MA
Re: oil pressure testing
I added a gauge next to the ammeter on my 48 and it works just fine. Reads the same as the one on the filter housing.
I have both but refer to the one closer as it is easy to read.
I have both but refer to the one closer as it is easy to read.
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- Team Cub Mentor
- Posts: 5637
- Joined: Thu Aug 03, 2006 6:20 am
- Zip Code: 43358
- Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
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49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D - Circle of Safety: Y
- Location: OH West Mansfield
Re: oil pressure testing
In some cases, it may be possible to overtighten one or both compression nuts on the nylon tubing, to the point it closes off the tube. This shouldn't be possible with the proper ferrule, nut and fitting that match each other, but? Cubota has the 1/8" nylon tubing to the dash mounted gauge, working with no problem. Qtr Milr, I like the copper tubing but I've had one break, from vibration, and cost me an engine. (late at night, driving home, didn't know I was losing my oil, it had a 1/4" line.)
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- 5+ Years
- Posts: 73
- Joined: Sat May 14, 2016 9:35 am
- Zip Code: 46723
- Tractors Owned: 1948 Cub
1935 JD "B"
Kubota BX2380
Re: oil pressure testing
Gary Dotson wrote:In some cases, it may be possible to overtighten one or both compression nuts on the nylon tubing, to the point it closes off the tube. This shouldn't be possible with the proper ferrule, nut and fitting that match each other, but? Cubota has the 1/8" nylon tubing to the dash mounted gauge, working with no problem. Qtr Milr, I like the copper tubing but I've had one break, from vibration, and cost me an engine. (late at night, driving home, didn't know I was losing my oil, it had a 1/4" line.)
I’ve heard to many horror stories about nylon rupturing in race cars and taking out motors.... it goes both ways....
Scott
- Sailor
- 10+ Years
- Posts: 383
- Joined: Fri Mar 28, 2014 7:59 pm
- Zip Code: 42261
- Tractors Owned: 1948 Farmall Cub
Ser.# 16812
1938 Farmall F-14
Ser# 131806 - Circle of Safety: Y
- Location: KY, Morgantown
Re: oil pressure testing
If all else fails, remove the oil pressure regulator. Remove the piston and spring. Check the cylinder walls for corrosion and the spring for proper tension. In my case, the piston had traveled to an area of the cylinder that contained rust and had frozen. I was getting little to no movement from the needle.
Suggestion provided from members of this site... and it worked for me.
Suggestion provided from members of this site... and it worked for me.
1948 Cub
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Cub-189 Moldboard Plow (direct-Connected, One Bottom, Two-way)
Woods 59 Mower
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Cub-54 Leveling & Grading Blade
Cub-144 Cultivator
Cub-189 Moldboard Plow (direct-Connected, One Bottom, Two-way)
Woods 59 Mower
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