CA Hydraulic Pump Not Functioning
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=203284
Printed Date: 19 Sep 2024 at 8:00pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: CA Hydraulic Pump Not Functioning
Posted By: dfwallis
Subject: CA Hydraulic Pump Not Functioning
Date Posted: 19 Sep 2024 at 12:44pm
|
Not even a hint of pumping, full fresh oil. Do I need to prime it? Not been operated in at least 30 years, probably 40. Piston noise sounds normalish if not a little louder than I remember. Things to check before I take it apart? I adjusted screws out against stops, disabled drawbar control by loosening adj screw and screwing lock screw into the housing, hold plate locked together. I'm betting suction ball bearing stuck, rusted... ------------- 1952 CA13092 |
Replies:
Posted By: dfwallis
Date Posted: 19 Sep 2024 at 1:58pm
|
Ok, oil drained, delicate workbench cleaned, let the surgery begin:( I was hoping against hope, but not unexpected. ------------- 1952 CA13092 |
Posted By: dfwallis
Date Posted: 19 Sep 2024 at 2:50pm
|
Stuck piston, gobs o gunk in intake...suspiciously, one of the mounting bolts was loose. ------------- 1952 CA13092 |
Posted By: steve(ill)
Date Posted: 19 Sep 2024 at 3:56pm
  ------------- Like them all, but love the "B"s. |
Posted By: dfwallis
Date Posted: 19 Sep 2024 at 4:18pm
|
How do you unstick a fully depressed piston, nothing to grab onto, no back side access. ------------- 1952 CA13092 |
Posted By: steve(ill)
Date Posted: 19 Sep 2024 at 4:30pm
|
is there a port 90 degrees to the side to blow air into the top of the piston ? If air is not enough, maybe soak thru the port with penetrating oil, then put a spoon full of oil thru the port and compress to build up psi ? ------------- Like them all, but love the "B"s. |
Posted By: dfwallis
Date Posted: 19 Sep 2024 at 4:44pm
|
Check valve port inline, but none of the balls move. I haven't researched which direction they check ------------- 1952 CA13092 |
Posted By: ekjdm14
Date Posted: 19 Sep 2024 at 5:12pm
|
Assuming it's stuck because of gunk and not mechanical damage, I'd be inclined to throw it in either a heated parts washer* or ultrasonic tank to try and free things up. If it doesn't loosen the piston it at least ought to free up the check balls and allow you to use air. I mention damage because of the loose bolt, hopeful someone didn't gouge it up trying to remove previously. *A dishwasher, minus the salts, can suffice in a pinch. Just make sure to oil parts after drying to avoid flash corrosion, and DO NOT attempt if there's a chance of being busted in the act by the wife! Ours takes about 50 minutes including drying cycle.
|
Posted By: dfwallis
Date Posted: 19 Sep 2024 at 6:26pm
|
Dad suggested tack weld to it ------------- 1952 CA13092 |
Posted By: dfwallis
Date Posted: 19 Sep 2024 at 6:35pm
|
Omg, I kept tapping on it a little here and there now and then, and it popped up!!!!!! It appears to be just a very tiny amount of rust on the cylinder and piston. Not bad at all, the spring is like new also. Surprising that it was stuck that hard. When it popped, it almost came completely out of the cylinder. ------------- 1952 CA13092 |