Post support questions about your JD350 and newer crawler here
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jimmydiesel
- 440 crawler
- Posts: 193
- Joined: Tue Oct 26, 2021 10:23 am
- Location: North Central Washington
Post
by jimmydiesel » Fri Dec 05, 2025 12:31 pm
The swing cylinder on my John Deere 410 backhoe was leaking around 1 gallon of hydraulic oil an hour. It was time to reseal it. This uses the round rotary swing cylinder that is also used on some 350,450 and other crawlers with a backhoe. I only took a few pictures but thought it might help someone else get this job done. I called the nearest JD dealer looking for a repair kit (au40976) and was told that it was obsolete and not available. So I used the advise that Jim B has given some people on this site. And ask the parts man if he could do a system search and see if any other dealer might still have one. This showed 1 dealer with the kit in inventory. The parts man gave me the dealer name and phone number. So I called and the parts man there told me that that kit is obsolete and not available. I told him that my local dealer had done a system check and it showed that they had 1 in stock. So he checked and sure enough they had 1 in the shelf. Problem solved.
This was the leaker before removal.
Removal wasn’t to bad. Ready for disassembly
Removing the vane from the shaft. 6 bolts and 8 dowels hardest part of the repair
All the parts cleaned up
Old parts on the left new parts on the right
No more external leaks. The old internal seals were leaking also, so now is much more positive.
Last edited by
jimmydiesel on Sun Dec 07, 2025 5:54 pm, edited 1 time in total.
440 ICD 602 Blade 3Pt.hitch.
440 ICD 602 Blade Gearmatic winch.
440 ICD 64 6 way Blade Carco winch
440 ICD 831 Loader
440IC 831 Loader
1010c Diesel 612 6 Way Blade
North Central Washington State
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LeonardL
- 350 crawler
- Posts: 928
- Joined: Thu Oct 06, 2011 7:11 pm
- Location: Missouri
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by LeonardL » Fri Dec 05, 2025 4:06 pm
I only had to do two of those in my entire career. Which spans about fifty plus years. They are a bearcat to say the least. You did good though dude!! Nice work!!
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.
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Lavoy
- Site Admin
- Posts: 11134
- Joined: Sun Apr 03, 2005 8:32 pm
- Location: North Dakota
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Contact:
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by Lavoy » Sat Dec 06, 2025 10:13 am
WOW, heard they were a lot of work.
Lavoy
Parts and restoration for antique and late model John Deere crawlers.
Owner and moderator
www.jdcrawlers.com
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jimmydiesel
- 440 crawler
- Posts: 193
- Joined: Tue Oct 26, 2021 10:23 am
- Location: North Central Washington
Post
by jimmydiesel » Sun Dec 07, 2025 12:18 am
Thanks Leonard
A bearcat is a good description.
I put the job off for a few months thinking I had to remove the boom. I finally looked in the 410 shop manual and found out it could be removed and leave the boom on. The shop manual had helpful disassembly and assembly info. The outrigger hydraulic cylinders are next.
Need to do a lot of digging in the spring.
440 ICD 602 Blade 3Pt.hitch.
440 ICD 602 Blade Gearmatic winch.
440 ICD 64 6 way Blade Carco winch
440 ICD 831 Loader
440IC 831 Loader
1010c Diesel 612 6 Way Blade
North Central Washington State
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Stan Disbrow
- 350 crawler
- Posts: 2992
- Joined: Fri Jul 15, 2005 3:13 pm
- Location: Raleigh, NC
Post
by Stan Disbrow » Sun Dec 07, 2025 7:13 am
Hi,
Score!
That is more seals for any one thing as I have ever seen.
Stan
There's No Such Thing As A Cheap Crawler!
Useta Have: '58 JD 420c 5-roller w/62 inside blade
Useta Have: '78 JD350C w/6310 outside blade
Useta Have: '68 JD350, '51 Terratrac GT-25
Have: 1950 M, 2005 x495, 2008 5103 (5045D), 2025 3025E
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