JD440 IC flush the hydraulics

General help and support for your Lindeman through 2010 John Deere crawler
Post Reply
joetucker1992
MC crawler
MC crawler
Posts: 7
Joined: Thu Mar 07, 2019 10:07 pm

JD440 IC flush the hydraulics

Post by joetucker1992 » Mon Mar 11, 2019 6:46 am

Can someone tell me how to flush the hydraulic system. I changed it once but it is so bad looks like water still in the old oil its still murky. I heard flushing with hydraulic oil/diesel works. But which hose do I take off to start bleeding it until new oil comes through?

B Town
350 crawler
350 crawler
Posts: 752
Joined: Fri Dec 11, 2015 7:04 pm
Location: Western Iowa

Re: JD440 IC flush the hydraulics

Post by B Town » Mon Mar 11, 2019 9:05 am

I have read several articles/members using Seafoam with good results. There is a lot of fluid in the cylinders and hoses that will need purged.

User avatar
Lavoy
Site Admin
Site Admin
Posts: 10937
Joined: Sun Apr 03, 2005 8:32 pm
Location: North Dakota
Contact:

Re: JD440 IC flush the hydraulics

Post by Lavoy » Mon Mar 11, 2019 9:17 am

When Deere talks about flushing, you drain the reservoir and refill with kerosene, but diesel would do the same thing. Run the system, but do NOT touch any of the hyd levers, that would introduce whatever you use into the cylinders. Drain out the flush, and refill with hyd oil. Other than disassembly, there is no good way to clean out the cylinders. You could take them off and with the hoses disconnected, cycle them by hand to get as much oil out as possible. Other than doing that, I would add Seafoam as has been suggested.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com

dtoots1
350 crawler
350 crawler
Posts: 1162
Joined: Fri Nov 30, 2012 8:54 am
Location: akron, ohio

Re: JD440 IC flush the hydraulics

Post by dtoots1 » Mon Mar 11, 2019 9:20 am

Lavoy,
how much sea foam do you put in?

User avatar
Lavoy
Site Admin
Site Admin
Posts: 10937
Joined: Sun Apr 03, 2005 8:32 pm
Location: North Dakota
Contact:

Re: JD440 IC flush the hydraulics

Post by Lavoy » Mon Mar 11, 2019 9:23 am

I use a whole bottle. I also like to do it when I know I am going to be using the crawler for a while so the oil warms up too.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator www.jdcrawlers.com

joetucker1992
MC crawler
MC crawler
Posts: 7
Joined: Thu Mar 07, 2019 10:07 pm

Re: JD440 IC flush the hydraulics

Post by joetucker1992 » Wed Mar 20, 2019 5:37 am

thank you everyone who responded. I appreciate it.

joetucker1992
MC crawler
MC crawler
Posts: 7
Joined: Thu Mar 07, 2019 10:07 pm

Re: JD440 IC flush the hydraulics

Post by joetucker1992 » Fri Apr 05, 2019 11:51 am

I got the hydraulics flushed much better looking oil now. Thanks for all the people who responded.

dtoots1
350 crawler
350 crawler
Posts: 1162
Joined: Fri Nov 30, 2012 8:54 am
Location: akron, ohio

Re: JD440 IC flush the hydraulics

Post by dtoots1 » Fri Apr 05, 2019 12:56 pm

Joe,
just as info..just did add sea foam motor treatment to my jd440ic hydraulics...4 ounces in my tank that was completely milky...half hour later clean as new oil!!!! gonna try it in my tranny which was changed (oil) last year just to see what happens...gonna try 4 ounce and then maybe the other 4 if no difference before i change the oil

Post Reply

Who is online

Users browsing this forum: yukonjack and 41 guests