2000 JD 4400 and 430 loader problem: John Deere Review  -- John Deere Tractors Discussion Forum and Review 2000 JD 4400 and 430 loader problem: John Deere Review -- John Deere Tractors Discussion Forum

  parts   |   manuals   |   discussion   |   photos   |   podcast   |   reviews   |   specs   |   dealers   |   classifieds   |   contact   |   faq   |   myProfile   |   home          Login Now | Sign Up


FAQ:   What is a tractor?

Forum Index
New As Posted | Active Subjects



www.emerichsales.com - New & Used Equipment
          View Tractors For Sale!


www.partsbynet.com - Lawn and Garden Equipment Parts


Bernardsville Landscape Lighting
Click to Post a New Message!

Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

Page [ 1 ] |
Reply | Pop Up Window Reply | Add PhotoAdd Photo
 02-03-2004, 10:25 Post: 75846
Horizon



Join Date: Feb 2004
Location: Otoe
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 2

2
Filter by User
 2000 JD 4400 and 430 loader problem

Have a problem I have been trying to diagnose for a while. Loader drifts down while in use. When trying to raise loader slowly, it will drop. Replaced spool valve last spring and the problem was still there until I used it some then problem magically went away. Used loader hard this past fall and problem is back. Swapped lift arm and bucket hoses to spool valve with no effect. Dis-connected lift arm hoses with loader raised, loader dropped only small amount. Wondering about the main pressure control valve. Any thoughts?






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-03-2004, 10:30 Post: 75848
Chief



View my Photos

View my Photos  Pics
Join Date: Jul 2003
Location: Southwest MiddleTennessee
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 4278
 2000 JD 4400 and 430 loader problem

What is your hyd. pump pressure? Could be the pump is allowing some leakage? Just a thought to consider. Is the speed of the hydraulics any slower that when it was working properly?






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-03-2004, 11:49 Post: 75851
deeremd



Join Date: Jul 2003
Location: maryland
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 18
 2000 JD 4400 and 430 loader problem

I don't know about the 430 loader; however, the 419 loader on my 790 will also drift down over time. According to my JD dealer, this drifting is perfectly normal with the types of valves that JD is now using. Anyone else experienced this?






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-03-2004, 12:29 Post: 75854
ncrunch32



View my Photos

View my Photos  Pics
Join Date: Dec 2003
Location: Kingston, NY
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 762
 2000 JD 4400 and 430 loader problem

Sure - my 430 loader on JD4310 will slowly drop when tractor is shut off. It will drop maybe 5 inches in 15 minutes. My 47 BH will also drop when tractor is running and I have to keep it pinned up when not actively using it. But this drop is to be expected according to operator manual (although it is annoying).

I have never noticed the FEL dropping while tractor is running - I am usually adjusting the bucket position often enough that this would not be noticeable. Nor has the FEL ever dropped when I raise it slowly - at least not that I noticed.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-03-2004, 15:37 Post: 75864
harvey



View my Photos

View my Photos  Pics
Join Date: Sep 2000
Location: Moravia, NY
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 1525
 2000 JD 4400 and 430 loader problem

Was the spool valve new or rebuilt? When was the oil changed last? What type of oil in it? Oil strainer? Oil filter?

Sounds like the valve leaking or bypassing. So it could be a bad "O" ring or 2. So why did it happen the 2nd time? That was the question about hyd oil and new or used or rebuild valve.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-03-2004, 18:17 Post: 75878
Horizon



Join Date: Feb 2004
Location: Otoe
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 2

2
Filter by User
 2000 JD 4400 and 430 loader problem

New spool valve. New oil (JD recommended). New filter. Having dis-assembled the old spool valve, there are no replaceable internal oil rings (nothing inside the spool valve can be repaired). Have not yet checked the oil pressure. Have also attempted to bleed any air out of the loader by cracking fittings - didn't notice any. As new spool was over $300.00 (self installed) I'm trying to eliminate all other possibilities. It seems odd to me that both the lift arm and roll back spools would both be bad.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-03-2004, 19:53 Post: 75890
TomG

TP Contributor

Join Date: Feb 2002
Location: Upper Ottawa Valley
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5406

2
Filter by User
 2000 JD 4400 and 430 loader problem

I think JD publishes standards for acceptable leak down rates. Some people consider the acceptable rates unacceptable so there's a good chance the leak down is within standards. A dealer should be able to say what the standard rate is.

Some pure theory here about drop when feathering the valve. Such a thing could happen if the spools weren't quite coordinated. For example, the work ports may open slightly before the return line is completely blocked. If the valve has anti-cavitation valves then feathering the valve could allow oil to pass from the lower side before pressure in the lift side builds. There likely are other possibilities but with any of them I wouldn't have a clue why the problem would be present in a rebuilt valve, then go away and reappear again. Little use to this except armchair theorizing I guess.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-03-2004, 20:49 Post: 75898
BrentB



Join Date: Jul 2003
Location: Illinois
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 21
 2000 JD 4400 and 430 loader problem

I had the same symptoms with my 420 loader. I'm pretty certain you have blown one of the lift cylinder seals. The clue is when you try to lift slowly that the loader drops. This is because the oil you are metering in to lift is leaking past the piston seal and back to return. when you lift fast you put more oil in than can leak past and the loader still goes up.

IT cost about $75 for the dealer to fix the cylinder a year ago. Search this site for leaking lift cylinders to learn how to test which one it is, or post here and I'll add the instructions.
Regards,
Brent






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

 02-04-2004, 06:05 Post: 75919
TomG

TP Contributor

Join Date: Feb 2002
Location: Upper Ottawa Valley
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster
Posts: 5406

2
Filter by User
 2000 JD 4400 and 430 loader problem

A leaking cylinder seal sure might do it. It'd be a simpler explanation then my theorizing, which might have gotten a bit confused from thinking that both the lift and bucket circuits are involved. I re-read the posts and think I was also recalling another thread where the person had disconnected the work port lines, which greatly reduced the leak-down. That's not a bad test to separate valve from cylinder leaks. A better test is locking down the bucket so it can't lift, disconnecting the lower line and trying to lift it. If the cylinders are leaking, oil should come out the lower line. I've never done the test but if I had to I have a spare quick-connect fitting so I could open the line without removing the fitting.






Reply to PostReply | Quote Post Reply to PostQuote Reply | Add PhotoAdd Photo




Bookmarks: Digg It | Del.icio.us | Stumble This

Reply | Pop Up Window Reply | Add PhotoAdd Photo


Page [ 1 ] |

Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

Thread 75846 Filter by Poster:
BrentB 1 | Chief 1 | deeremd 1 | harvey 1 | Horizon 2 | ncrunch32 1 | TomG 2 |




Most Viewed

+ John Deere 2210 Backhoe Review
+ John Deere vs Kubota Compact Tractors
+ John Deere 790 fuel shut-off solenoid failing???
+ John Deere low viscosity HY GARD
+ John Deere JD 4100 Wiring diagram
+ JD 790 or Kubota L3000DT
+ Should I buy a John Deere 4105???
+ John Deere 4300 turns over but won't start
+ John Deere 455 garden tractor
+ Oil Change for Diesel Tractor

Most Discussion

+ John Deere 4300 scuffing......
+ Possible Solution To The 4000
+ Dealer out to lunch
+ Just got my new JD 4410 - Prob
+ Hello Green, Goodbye Orange
+ Receiver hitch for iMatch
+ 4300 wheel bolt problems
+ 4000 Ten Series 50 hour break
+ Don't buy JD compact tractors.
+ Oil Change for Diesel Tractor

Newest Topics

+ Oil overflow from tube and Smoke
+ John Deere 4100 gear 3 point not workin
+ 2000 John Deer Gator 4 X2
+ Mini Excavator SY20C - Small Body with Big Power
+ John Deer 1070 starting problem
+ John Deere 990
+ Tractors R Us
+ john deere 4100 with 410 loader hydraulic problem
+ John Deere 2032R Buying advice
+ John Deere 2010 loss of hydraulics













Turbochargers for Tractors and Industrial Machines
Cab Glass for Tractors and Industrial Machines

Alternators for Tractors and Industrial Machines
Radiators for Tractors and Industrial Machines

Driveline Components for Tractors and Industrial Machines
Starter Motors for Tractors and Industrial Machines