This site uses cookies to maintain login information on FarmallCub.Com. Click the X in the banner upper right corner to close this notice. For more information on our privacy policy, visit this link: Privacy Policy
NEW REGISTERED MEMBERS: Be sure to check your SPAM/JUNK folders for the activation email.
Back pressure
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.
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.
-
leeboy50cub
- 5+ Years
- Posts: 30
- Joined: Fri Mar 27, 2015 9:42 pm
- Zip Code: 15717
Back pressure
1950 cub. Can hydraulic fluid leak from system into crankcase to create back pressure??? I'm losing hyd fluid with no puddle or drips that I can see ,got a lot of back pressure in crankcase . any thoughts on this? Smokes a lot too. Thanks
-
tmays
- 10+ Years
- Posts: 3410
- Joined: Wed May 11, 2011 8:59 pm
- Zip Code: 39154
- Tractors Owned: 1969 Farmall Cub
1952 Cub
1942 Farmall H - Location: Raymond, MS
Re: Back pressure
Sounds like you have two separate issues. Hydraulic pump seal gone, allowing hydraulic fluid into crankcase. Pressure in crankcase sounds like piston blowby.
Thomas
-
Bob McCarty
- Team Cub
- Posts: 11851
- Joined: Tue May 25, 2004 8:02 pm
- Zip Code: 80501
- Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
- Circle of Safety: Y
- Location: CO, Longmont
Re: Back pressure
The seal Thomas mentioned is an o-ring that goes on the drive shaft of the pump. You'll have to drain the block, remove the manifold lines, remove the pump and open it up to access the o-ring. If the hydraulics were working fine you probably don't need to rebuild the pump. TM Tractor (forum sponsor at the bottom of the page) sells both the separate o-ring and pump rebuild kits.
"We don't need to think more,
we need to think differently."
-Albert Einstein
we need to think differently."
-Albert Einstein
-
leeboy50cub
- 5+ Years
- Posts: 30
- Joined: Fri Mar 27, 2015 9:42 pm
- Zip Code: 15717
Re: Back pressure
Thanks Bob and Thomas . can you tell me where to find manual to do this project?
-
ricky racer
- 10+ Years
- Posts: 6336
- Joined: Wed Sep 12, 2007 8:40 pm
- Zip Code: 49120
- Circle of Safety: Y
- Location: Niles / Buchanan, Michigan
Re: Back pressure
Manuals at the top of this page. Free to download.
1929 Farmall Regular
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub
-
Bob McCarty
- Team Cub
- Posts: 11851
- Joined: Tue May 25, 2004 8:02 pm
- Zip Code: 80501
- Tractors Owned: Cubs, MH Pony, Shaw, Allis G, 1934 Silver King, JD LA and LI, Gibson D, David Bradley Tri-Trac
- Circle of Safety: Y
- Location: CO, Longmont
Re: Back pressure
Click on "quick links" upper left, then on "PDF manuals", then "service manuals", then "Blue Ribbon service manuals", then "GSS 1411". Can't do a direct link to get there.
"We don't need to think more,
we need to think differently."
-Albert Einstein
we need to think differently."
-Albert Einstein
-
Bill Hudson
- Team Cub
- Posts: 9522
- Joined: Wed Jul 26, 2006 10:50 am
- Zip Code: 44057
- Tractors Owned: 57 F-Cub - Dad & Mom's Cub
77 F-Cub - Red Long Stripe - Circle of Safety: Y
- Location: OH, Madison
Re: Back pressure
tmays wrote:Sounds like you have two separate issues. Hydraulic pump seal gone, allowing hydraulic fluid into crankcase. Pressure in crankcase sounds like piston blowby.
You betcha.
Bill
Bill
"The probability of life originating from accident is comparable to the probability of the unabridged dictionary resulting from an explosion in a printing shop." Edwin Conklin, biologist
Member of Ohio Chapter #6
"The probability of life originating from accident is comparable to the probability of the unabridged dictionary resulting from an explosion in a printing shop." Edwin Conklin, biologist
Member of Ohio Chapter #6
-
John *.?-!.* cub owner
- Cub Pro
- Posts: 23701
- Joined: Sun Feb 02, 2003 2:09 pm
- Zip Code: 63664
- Tractors Owned: 47, 48, 49 cub plus Wagner loader & other attachments. 41 Farmall H.
- Location: Mo, Potosi
Re: Back pressure
May not be bad rings in engine causing blow by, may be crankcase over full with Hytran. A cousin called me about his cub, said it was leaking fuel into the crankcase, and engine was losing power. When he said he had been adding fluid to the touch control I explained to him about the pump. He repaired the pump and changed engine oil and had a much better running tractor
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
-
ntrenn
- 10+ Years
- Posts: 804
- Joined: Tue Apr 17, 2012 7:55 pm
- Zip Code: 47119
- Skype Name: ntrenn
- Tractors Owned: 63 Cub 221833 in family since '69
65 Lo-boy 19648 with an un-stuck #4 - it lives!!!
144 Cultivators with disc hillers
193 Plow
42C mower
59L mower mounted on the Fcub
23A Disc - lost possession - Circle of Safety: Y
- Location: Indiana
Re: Back pressure
Ditto on the hytran leak. Its NOT engine oil and turns your good cub into a smoker. If you buy the ih pump seal kit it has instructions and all the gaskets to go with all the seals and orings. No key but your local hardware store will have the key for less than a buck. Dont forget to stake the lock retainer...lest you have to pull it back apart to stake 
-
ShawnAgne
- 5+ Years
- Posts: 846
- Joined: Sat May 07, 2016 5:13 pm
- Zip Code: 45380
- Tractors Owned: 1952 Cub w/ 184 motor (Kid)
12V with Petronix
IH 3160 Mower Deck
54 Leveling Blade
193 Plow
IH528 Trailer
Front/Rear Weights
1955 Farmall 300 (Clarence)
12V with Petronix
Woods L306 72"
1955 Farmall 100 (Thomas)
12V with Petronix
Woods L59 60"
A60 Leveling Blade
Front/Rear Weights - Circle of Safety: Y
- Location: Versailles, Ohio
Re: Back pressure
Also make sure you put the gear back on the proper way. Don't ask me how I know.....
Shawn Agne
-
inairam
- 5+ Years
- Posts: 2821
- Joined: Wed Jul 08, 2015 10:24 am
- Zip Code: 19342
- Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide - Circle of Safety: Y
- Location: Glen Mills PA
Re: Back pressure
This is long old post that I found helpful on the pump viewtopic.php?f=1&t=40331&hilit=hydraulic+pump+seal
I do agree with the previous posters that the hydraulic fluid/ oil burns more than oil. My 49 was doing the same thing. First fix the seal on the hydraulic pump, change the oil and then see what your back pressure/oil burn looks like.
Do not lose the tab washer locking the nut that is holding the gear. you need that. May even want to use that and a lock nut to hold the gear in place. It is no fun fishing that gear out of the oil pan.
I do agree with the previous posters that the hydraulic fluid/ oil burns more than oil. My 49 was doing the same thing. First fix the seal on the hydraulic pump, change the oil and then see what your back pressure/oil burn looks like.
Do not lose the tab washer locking the nut that is holding the gear. you need that. May even want to use that and a lock nut to hold the gear in place. It is no fun fishing that gear out of the oil pan.
When you only have 9 horsepower you need to know the names of all of the ponies!
-
leeboy50cub
- 5+ Years
- Posts: 30
- Joined: Fri Mar 27, 2015 9:42 pm
- Zip Code: 15717
Re: Back pressure
Thanks for all the info! But still a ??. Are their two different pumps? I'm finding pics of the resivoir one with lots of parts and a smaller one with a few parts and o rings.
-
tmays
- 10+ Years
- Posts: 3410
- Joined: Wed May 11, 2011 8:59 pm
- Zip Code: 39154
- Tractors Owned: 1969 Farmall Cub
1952 Cub
1942 Farmall H - Location: Raymond, MS
Re: Back pressure
Only one pump. The large one under fuel tank is hydraulic body. The pump is attached to front left side of engine. The pump is the culprit.
Thomas
-
inairam
- 5+ Years
- Posts: 2821
- Joined: Wed Jul 08, 2015 10:24 am
- Zip Code: 19342
- Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
130 with international 1000 loader 6 v
1969 140 with bush hog tow behind mower 12 v
Terramite T-6 4WD Backhoe Perkins diesel
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide - Circle of Safety: Y
- Location: Glen Mills PA
Re: Back pressure
There is only one pump on the Cub but there are several changes over time so there are a few different internals of the pump and seal.
When you only have 9 horsepower you need to know the names of all of the ponies!
-
leeboy50cub
- 5+ Years
- Posts: 30
- Joined: Fri Mar 27, 2015 9:42 pm
- Zip Code: 15717
Re: Back pressure
OK, thank you. Think I got it now. Going to order kit from TM. Keep ya posted, thanks again to all.
Who is online
Users browsing this forum: No registered users and 57 guests
