wd45 hyd pump
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=16940
Printed Date: 05 Feb 2025 at 2:12pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: wd45 hyd pump
Posted By: Jeff(WC)(MI)
Subject: wd45 hyd pump
Date Posted: 21 Aug 2010 at 1:49pm
| when i have my plow hooked to the tractor and it's in the up position and tractor is idling and clutch is out..i hear a knocking or tapping in the trans...i was told it's the pump bypassing...if i clutch the tractor or idle up a little it goes away...is this normal or a problem? hydraulics seem to work good and normal |
Replies:
Posted By: Jeff(WC)(MI)
Date Posted: 21 Aug 2010 at 1:49pm
| oh and i did drain the hydraulics when i got it and fill back up with 20w non detergent |
Posted By: CTuckerNWIL
Date Posted: 21 Aug 2010 at 1:52pm
|
That's pretty normal. I don't know if it is the pistons in the pump knocking or if it is the unloader spool hammering, but is nothing to worry about.
------------- http://www.ae-ta.com" rel="nofollow - http://www.ae-ta.com Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF |
Posted By: Jeff(WC)(MI)
Date Posted: 21 Aug 2010 at 2:00pm
| ok just curious...never had a tractor do that before...sure can make a feller nervous to start hearing that! |
Posted By: Steve M C/IL
Date Posted: 21 Aug 2010 at 2:32pm
| Normal.I grew up with it so I never knew the difference. |
Posted By: Max(ia)
Date Posted: 21 Aug 2010 at 4:05pm
| My CA does that, but if I put the lever in hold position after the blade is raised, it stops |
Posted By: Jeff(WC)(MI)
Date Posted: 21 Aug 2010 at 4:24pm
| ok thanks guys...eased my mind |
Posted By: CJohnS MI
Date Posted: 21 Aug 2010 at 5:17pm
Jeff... ... does this mean you found the source of the original "noise"? |
Jeff(WC)(MI) wrote:Posted By: Roddo
Date Posted: 21 Aug 2010 at 8:27pm
| That is some primitive hydraulics by todays standards. Its likely just not sealing somewhere and running ever so slightly to keep pressure. Mine does the same thing. |
Posted By: Jeff(WC)(MI)
Date Posted: 21 Aug 2010 at 8:55pm
| nope John, this is all together different, maybe the original noise is like you said about your cat, all my bad deeds coming back and making me paranoid?! |
Posted By: CJohnS MI
Date Posted: 21 Aug 2010 at 9:12pm
Well, I can't speak for you - but my cat deserves it! |
Posted By: Brian G. NY
Date Posted: 21 Aug 2010 at 9:35pm
| I think Max nailed it; if the lever is not moved back to the hold position after the rams reach their maximum lift, the hydraulic system is recycling oil thru the unloader valve and will sometimes make that kind of a sound. I have one WD-45 that "knocks" like that much more than either my other WD-45 or the WD, but they all do it to some extent. |