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4430 Hydraulic Question

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Tim A.

02-23-2005 19:06:30




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I unloaded a trailer load of round bales for my neighbor the other night...a total of 12 bales. About half way through the load, it seemed that my loader started to function slower than it did in the beginning, and did not move as smoothly either. Any ideas???

Also, should I add additional hydraulic fluid when equipped with a loader, or is the full mark on the dipstick enough...

Thanks,
Tim

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Gord

02-24-2005 23:01:05




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 Re: 4430 Hydraulic Question in reply to Tim A., 02-23-2005 19:06:30  
To check the hydraulics properly you should do the following-
Change hyd filter, LH side of trans on Quad range. No need to drain transmission oil, you will lose about 1-2 qts of oil.
Drain trans/hyd oil and check screen, LH side in front and just below LH rear axle housing.
If hyd is not any better-Check Main hyd pump standby pressure at rear couplers-2350 psi @ 2000 RPM.
When tractor is idling for about 15 minutes with no hyd functions engaged, check for hot oil lines or hot rear SCV valve housings. This would indicate high pressure internal leakage. Check transmission pressure on Clutch Pressure Regulating valve housing-175 psi at 1000 RPM.
The transmission pump has to supply low pressure oil to the high-low, PTO, and clutch and if any of these functions are leaking internally then the main hyd flow will be affected. Usually if the low pressure system is not functioning correctly then the transmission pressure light in the dash should come on at low idle with warm oil. You said that the loader was not connected to the rear SCV valves-How is it plumbed in? If a hyd valve is installed that is a generic-open/closed center hyd valve, it may have problems internally. Keep us posted with what you have found.

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msb

02-23-2005 19:13:03




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 Re: 4430 Hydraulic Question in reply to Tim A., 02-23-2005 19:06:30  
Full mark is enough.Two way cylinders are constantly refilling the transmission.
Have you changed the hydraulic filter? Try that first.Could be a plugged suction screen in the bottom of the transmission.Could also be a bad hydraulic hose liner.Also the hydraulic pump drive coupler going bad to name a few possible causes.



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Tim A.

02-23-2005 19:28:04




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 Re: 4430 Hydraulic Question in reply to msb, 02-23-2005 19:13:03  
Thanks, I have a new filter...just haven't changed it yet. I haven't had this tractor very long and haven't had time to get super familiar with it. Will I be able to access the screen when I change the filter, or do I have to remove a cover on the bottom of the tractor (my Case 1394 has a separate cover on the bottom not colocated with the filter.) Also, not to sound stupid and this may be hard, but are there 2 hydraulic pumps on this tractor...one internally and one in front. (The previous owner said about 2 years ago he had the hydraulic pump rebuilt and since they split the tractor, they replaced the clutches also...was this b.s.?) Finally, if it is a hose liner, is there anyway to narrow this down, or is it a matter of replace one and see what happens? Some of the hoses on the rear of the tractor appear to be almost new, and some are weathered/cracked and look like a breakdown waiting to happen...I guess those are the ones to start with..

Thanks Again,

Tim A.

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Hayfarmer

02-23-2005 19:49:59




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 Re: 4430 Hydraulic Question in reply to Tim A., 02-23-2005 19:28:04  
There are 2 hydraulic pumps, the one in the back keeps oil to the pressure pump in the front. It also handles some other chores but is not high pressure. Filter would be a good place to start. Is the loader plumbed into the remote outlets on tractor or with separate valves? If the tractor is new to you you might want to change the hydraulic fluid, some have never been changed unless they sprung a leak. Check to see if lines are getting hot, this can be caused by a leak in the system most anywhere. Sometimes as stuff warms up it gets worse.

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matthies

02-23-2005 19:49:37




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 Re: 4430 Hydraulic Question in reply to Tim A., 02-23-2005 19:28:04  
You could just change the filter and try it, but since you don't know much about this tractor drain the hyd. oil and check the screen. The screen plug is just behind the filter housing and takes a 1/2 inch breaker bar (sguare drive) to remove the plug. If your tractor is a powershift then what he said was true with the clutches and pump. chris



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Tim A.

02-23-2005 20:28:27




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 Re: 4430 Hydraulic Question in reply to matthies, 02-23-2005 19:49:37  
Thanks guys...the loader is NOT plumbed into the remotes. When you mentioned feeling for hot lines and this indicating a leak, you mean a leak internally, correct? Also, this tractor is a Quad Range and not a Power Shift.

One thing I forgot to mention earlier, I purchased this tractor from a dealer...but spoke to the previous owner before the purchase. Anyways, the dealer installed new belts and a new alternator as part of our deal. It appears that the hydraulic pump coupler is new...and this was one of the possible problems in a previous post. An important thing...I did notice after using the tractor that the belts are quite loose...and it would make sense that this could be affecting the pump also...correct?

Thanks for the help...I grew up turning wrenches on trucks/trailers with my dad and fly airplanes for a living now...started my tractor/implement collection about 3 years ago so I am still learning some specifics...especially about hydraulics...

Tim A.

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another doug

02-25-2005 02:49:03




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 Re: 4430 Hydraulic Question in reply to Tim A., 02-23-2005 20:28:27  
Tim, Your new belts will probably need to be tightened once they break in some, normal. Our 4430 has a trans light that flashes alot and when cold... won't shift from 1-2 or 3-4 in what ever quad range it's in when cold..., it works fine when warm.Those other guys gave you alot of things to check out for possible fixes, keep us up to date. I have an Aerosport Scamp biplane, haven't flown for years , but good memories.doug

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Tim A.

02-25-2005 20:00:52




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 Re: 4430 Hydraulic Question in reply to another doug, 02-25-2005 02:49:03  
Thanks for the info...I won't get a chance to work on it for a while. Am in the process of rebuilding a JD 435 round baler and that is taking what little spare time I have. My wife wants to take here colt to the Abilene Quarter show this weekend, so I will be busy with that, so little to no work on anything. I don't fly any civilian anymore...have these other hobbies. I fly for Uncle Sam...have flown the A-10, F-16 and have been instructing basic pilot training in the T-37 since 1997. Some of my buds have their own planes at the airport down the road...maybe when I retire I will have the time to do a little of that flying.

Take Care,
Tim A.

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thurlow

02-25-2005 06:28:32




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 Re: 4430 Hydraulic Question in reply to another doug, 02-25-2005 02:49:03  
Am I missing something here?? The (loose) belts might affect the water pump and alternator, but hydraulic pump>????



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Tim A.

02-25-2005 19:32:46




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 Re: 4430 Hydraulic Question in reply to thurlow, 02-25-2005 06:28:32  
Ok...now I feel stupid...the hydraulic pump coupler was mentioned earlier and the loose belts popped into my mind...but I didn't stop to think what turned what on the front of the engine. But I should check the coupler out, it may not be installed correctly. The (non-JD) dealer worked on the belts (I think the coupler was replaced at this time), alternater, rockshaft seal and seat...and when it was delivered 3 of the seat bolts were on the cab floor and the other was only in by one thread, the hydraulic drain plug was only finger tight, and the belts are loose. Not much of a quality control at that place!

Thanks for pointing out my misguided thinking!

Tim

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