Cletrac.org
September 21, 2019, 08:03:32 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: 10/5/12 - All new members are REQUIRED to fill out the signature section of your profile. Otherwise, you may be deleted from the forum. This is to help me determine if you are a member or if you are a spammer. Thank you.

9/22/12 - I ask that you please add a signature line to your profiles on the Cletrac Forum to help me to determine who is spam and who is not. You don't need to drop everything and do this immediately, but please do it when you get a minute and you are visiting the forum. Just go to http://cletrac.org/forum2010/index.php?action=profile and put something in the signature area. If you no longer want to be a member on the Cletrac Forum, please remove your membership.

8/10/11 - Added a new board: Trucking and Hauling

5/30/11 - Just added several new pictures to the Photo Gallery, including several Alfta Track OC-4 working in snow logging, several from the Chicago Road Show, and some from a logging show (not all Oliver/Cletrac). All these pictures are from around 1963 and were scanned from old slides given to me by my late friend John W. Davis. Go to the Photo Gallery and click on "NEW" to see these pictures. Quality is marginal, but I think you will enjoy them.

2/13/11 - Just added a new board "New members introduce yourselves here".

Folks, I just added a new photo gallery where you can upload your own pictures with descriptions, etc. Right now this is in the beta testing stage to see how it works out. Give it a try, but please keep a backup copy of your pictures just in case we decide to use something else. I would prefer you use your real name on the photo gallery, but if you really don't want to, please use the same username as on the forum. Please put your images into the proper categories and take care when your write out your descriptions and image names so people can search for them. I am learning this as we go. At least at the beginning, I have it set up where the administrator has to approve members. I am afraid we may get porn spam in here if we leave it open. To get to the photo gallery, use this link: http://cletrac.org/photos/

Folks, when you join the forum, or when you get the chance to update your Profile, please be sure to put your location and interests. Filling out your signature would help as well. I've been getting some spammers joining and posting links to sites that are completely unrelated to Cletrac or Oliver, or anything to do with tractors. It would make it easier for me, as well as all the other members, if you guys would put your location and interest in your profile. See http://cletrac.org/forum2010/index.php?topic=1299.msg5184#msg5184

Thanks,
Administrator
 
   Home   Help Search Calendar Login Register  
Pages: [1] 2   Go Down
  Print  
Author Topic: Troubleshoot hydraulic pump flow  (Read 7875 times)
0 Members and 1 Guest are viewing this topic.
440roadrunner
phpBB Jobsite Boss
*****
Offline Offline

Posts: 116


View Profile
« on: January 13, 2011, 07:28:37 PM »

On my little  ??  Cleota,  using an old belt driven pump,  it's finally apparrent that the hydraulics are getting SLOW.   I had a internally bypassing cylinder which I fixed, and now it holds "up"  in good shape.   the pump generates enough pressure to lift the front end of the crawler on downpressure,  and the belt drive will squeal   at full cylinder travel.    

I do have a suction filter,  forgot, but specifically asked for "big"  micron spec because I figured this old system needed all the slop it could get.

I suspect the filter may be getting plugged,  although I did run it awhile when first installed,  then changed the filter.  This was before this trouble began, which has just be sometime lately  My memory thinks there may be test  taps on the filter.   If so,  what max  suction should I expect, each side of the filter?  ------

and how else can I go about this?    


Pump does not lift far, maybe 1 foot.   Suction line is about 3, maybe 4' of 3/4 hose, double braid.  All pressure hoses are 1/2"

http://cletrac.org/forum2010/index.php?topic=2321.0

Best picture of the hydraulics I have,  this was before I installed the filter  on the line coming out the lower right (front) end of the tank:



In the shot below you can see the pump, and that it doesn't lift much.   Am I thinking correct, that since it still develops pressure enough to lift the cat off the ground that the pump is not internally bypassing?


« Last Edit: January 13, 2011, 07:31:05 PM by 440roadrunner » Logged

You cannot break it if it's broken,  but....
You can fix it so it cannot be fixed!!
Tim Ling
phpBB Master Operator
****
Offline Offline

Posts: 24


View Profile
« Reply #1 on: January 13, 2011, 10:12:57 PM »

Look and see if there is a test port on your hydraulic valve, where you can tap a gauge into and check main relief pressure. You could also connect a gauge in line at your lift cylinder and check pressure there. I feel that if the blade will lift the front of the tractor in the down position, that you are getting adequate pressure and the pump is not at fault.
Logged
John Schwiebert
phpBB THE Boss
*****
Offline Offline

Gender: Male
Posts: 710


View Profile
« Reply #2 on: January 14, 2011, 10:13:12 PM »

Filters on the suction side are not good news. A strainer is O. K. A filter should be on the return side. Also do not use pressure hose for a suction hose. How large a cylinder are you using? A poor mans flow rater is to know the volume of the cylinder and then the time to extend it. Then do the math and convert the output to GPM.
Logged

John Schwiebert
hotratz
phpBB THE Boss
*****
Offline Offline

Gender: Male
Posts: 528



View Profile
« Reply #3 on: January 14, 2011, 10:59:13 PM »

.......Also do not use pressure hose for a suction hose.......... 

John, could you elaborate on this a little?
Logged

440roadrunner
phpBB Jobsite Boss
*****
Offline Offline

Posts: 116


View Profile
« Reply #4 on: January 14, 2011, 11:42:56 PM »

Filters on the suction side are not good news. A strainer is O. K. A filter should be on the return side. Also do not use pressure hose for a suction hose. How large a cylinder are you using? A poor mans flow rater is to know the volume of the cylinder and then the time to extend it. Then do the math and convert the output to GPM.

Ya know it just never occurred to me that I could put this into the return!!!

I haven't had time to deal with this more,  I've been thinking of (temporarily)  just yanking the filter out of the system.   I guess it'd be a good time to replumb!!

Also,  tonight I may have run into a buy on a pump,  I'll have to find out if you can belt drive it:

http://spokane.craigslist.org/tls/2161196157.html
Logged

You cannot break it if it's broken,  but....
You can fix it so it cannot be fixed!!
John Schwiebert
phpBB THE Boss
*****
Offline Offline

Gender: Male
Posts: 710


View Profile
« Reply #5 on: January 15, 2011, 07:13:25 AM »

It is your money. I don't know what pulley set up you have but a lot of smaller trucks (trucks with automatic transmissions and no provision for a PTO) with snow plows have belt driven pumps and with a clutch similar to an airconditioner clutch. Also remember pump output is theoretical. Use 80-85% of theoretical output for actual flow. On the suction hose, you need a hose that has support on the inside either when the hose was formed or it was installed after the hose was manufactured. On filters  for a gear pump a 30 micron filter on the return side is good. A 100 mesh strainer is good on the suction side.
Logged

John Schwiebert
440roadrunner
phpBB Jobsite Boss
*****
Offline Offline

Posts: 116


View Profile
« Reply #6 on: January 15, 2011, 11:16:58 AM »

On the suction hose, you need a hose that has support on the inside either when the hose was formed or it was installed after the hose was manufactured.


I was thinking last night,  maybe find  some big long springs  (can stretch them out longer)   and slip inside the suction hose.

Lord,  I hate to tear all that  stuff down,  probably won't be until   winter leaves us here
Logged

You cannot break it if it's broken,  but....
You can fix it so it cannot be fixed!!
LoggerLee
phpBB Master Operator
****
Offline Offline

Gender: Male
Posts: 81



View Profile
« Reply #7 on: January 21, 2011, 01:42:52 AM »

Heck man it was dang near 60* here beginning of the week,winter...haha
Heard there was some snow up there tonight.
Logged

3DDH tractors,Allis Chalmers M crawler,T-20,BDH,2112 Simplicity and a GT30 Terratrac.
hotratz
phpBB THE Boss
*****
Offline Offline

Gender: Male
Posts: 528



View Profile
« Reply #8 on: January 21, 2011, 03:08:47 PM »

  On the suction hose, you need a hose that has support on the inside either when the hose was formed or it was installed after the hose was manufactured. 

 Sad Well I guess I'll need to keep an eye on my suction hose. You learn something new every day don't cha'
Logged

440roadrunner
phpBB Jobsite Boss
*****
Offline Offline

Posts: 116


View Profile
« Reply #9 on: January 21, 2011, 08:33:47 PM »

Heck man it was dang near 60* here beginning of the week,winter...haha
Heard there was some snow up there tonight.

It doesn't know WHAT to do.  It's thawed, froze, snowed, thawed so many times this year that I can't count 'em. Thawing, raining, and just above freezing  (wet)  MAY  just be harder on my arthritis  than  colder and dryer.
Logged

You cannot break it if it's broken,  but....
You can fix it so it cannot be fixed!!
digitalhaze
phpBB Apprentice
*
Offline Offline

Posts: 1


View Profile
« Reply #10 on: February 19, 2011, 03:37:09 AM »

I have trolled these forums occassionally the past few years in the hopes of someday rebuilding my oliver. Got a bit excited when i saw this post, because it is the only other OC-3 I have seen with the holt blade. I am clearly lucky that my OC-3 remains completly unmolested after so many years. I was told by the local antique tractor expert that my blade was home made, he even claimed part of it was made from a piece of pipe, which i disputed. I am not even sure where I am going with this post, or why it would matter to anyone else, but here are a couple of photos of what should have been the original configuration.


Logged
hotratz
phpBB THE Boss
*****
Offline Offline

Gender: Male
Posts: 528



View Profile
« Reply #11 on: February 19, 2011, 11:49:11 AM »

dhaze, Welcome to the forum. If you hang around long enough you'll learn of quite a few with Holt blades. You tractor does look like it was kept pretty original. Pictures are always welcome, thanks. This post is a great candidate for the "New Members Introduction" section.
« Last Edit: February 19, 2011, 11:50:55 AM by hotratz » Logged

440roadrunner
phpBB Jobsite Boss
*****
Offline Offline

Posts: 116


View Profile
« Reply #12 on: February 27, 2011, 12:18:08 PM »

Hi,  digitalhaze.   Your Holt appears completely different from mine,  but I believe mine to be "hacked."   May not even have the correct blade.  Here's my  progression post  of   "how it went:"

http://cletrac.org/forum2010/index.php?topic=2321.0

If you go down through and wait for the photos to load up,  you can see how mine appears to be fabricated.     It was only this winter that I discovered the angle clamps  --obviously  hacked up-- were nowhere near adequate.   I'll probably  "pin"  the blade angled one way  and make at least one more clamp  and just leave it there.   SURE WISH MINE  was the narrow track like yours.   It's a real chore to get mine on the trailer!!

And I STILL have not turned a wheel   on the hydraulic problem.    This week was VERY  cold,  and as "we speak"  it's only about 22F and slowly warming back up from  Neg F   overnight.
« Last Edit: February 27, 2011, 12:19:46 PM by 440roadrunner » Logged

You cannot break it if it's broken,  but....
You can fix it so it cannot be fixed!!
Crazy Matt
phpBB Operator
***
Offline Offline

Gender: Male
Posts: 19


View Profile
« Reply #13 on: March 15, 2011, 12:18:10 AM »

Wonder if your hydraulic pump is going away.




Logged

hg 42 unknown year - soon to become a CAT Cheesy
440roadrunner
phpBB Jobsite Boss
*****
Offline Offline

Posts: 116


View Profile
« Reply #14 on: March 15, 2011, 09:57:26 PM »

hi, Matt.    I don't think it's the pump.  as you know,  the wx hasn't been good,  and what little good there is,  I've been overworked.     Just today hauled off a junked out 77 Dodge van to the wreckers.   I'd bought it for 350.00  for a "quickie"   driver engine (360) and Torqueflite for the new Dart while I go through  the "real"  360

Anyhow,  I just have not had time or wx  to pull it down.    I'm pretty sure at this point the filter is starting to restrict the pump,  and may have damaged the suction hose.

I don't know what in 'll I'd do without that chassis hoist.   Dropped 'er right out the bottom



Logged

You cannot break it if it's broken,  but....
You can fix it so it cannot be fixed!!
Pages: [1] 2   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!