ford 3000 hydraulic problems

[lcarver]

Hi folks, I am new to this site also new to this tractor. I have tried to repair the hydraulic lift with only minor success. it still has a very bad chatter when lifting a heavy implement (box blade 810Lb) have installed lift cover kit, cleaned suction filter, replaced return filter and adjusted per manual,
control valve and position valve. checked unloader valve.Help!

 

[Guesseral]

Did you replace the O ring a washer on the piston?

 

[lcarver]

yes it was part of the lift cover kit. thanks for the response

 

[Victor Atkins]

I've had to change the oil in my 3000 before and it helped because of moisture. Theres also a draft control lever and a speed control knob which I think acts as a flow control valve to adjust the speed in which the arms raise. sometimes the knob turns but does not actually turn the valve. If your tractor has the aux. valve the problem could be there. It sounds like you have a lack of oil flow.

 

[lcarver]

Thanks, I will check it out this weekend it does have the valve.thanks for the info

 

[bobflange]

I am having an identical problem on my ford 3400, which has the same rear hydraulics as the ford 3000 as far as i understand. I just replaced the same things you did, even got the suction filter out and got it completely clean, cleaned out the whole rear end etc.

I'll list a few ideas, I've already checked these on mine to no avail but maybe they will help you:

- Draft control knob screwed mostly back in? (You would have had it all the way out if you adjusted cam follower height like me, and it would barely lift deliberately as a result).

- I read to only use the FNH unloader valve o-ring, as that part is sized critically and cannot be replaced with a standard o-ring. I used the correct part though, and still have this problem. The correct o-ring does not come in the standard lift cover o-ring gasket set so it could trip you up. I don't know exactly what the unloader valve does, so I'm not sure if this would even cause this problem though.

I'll keep an eye on this thread, please let me know if you find a solution as it might help me with my problem (i'll do the same for you). Currently my lift takes over 20 seconds to raise.

 

[banjodunn]

G'day I have just had a similar problem at work and we tracked it down to the o ring where the suction pipe goes into the pump ( piston pump mounted on the bellhousing), you can check this by squirting a bit of oil round the baqk of the pipe where it goes into the pump and see if this improves your hyd ( the suction is the bigger of the two pipes ).


Jon

 

[bobflange]

thanks for the idea on the pump o-rings, I may give that test a try tomorrow

 

[lcarver]

Checked flow control valve operation this past weekend seems to slow down lift speed but lift still chatters when raising implement, lift also bobs
when lift is stopped at any height.My tractor has Transmission brake and gear type pump serial # starts with B so must be British model, oil in lift looks like coffee with cream when running must be air in hydraulics, oil looks fine several hours after shut down, has been changed twice with what dealer calls "303" type oil. I am going to try putting oil around suction line at pump today and see what difference it will make . Thanks for all the info.

 

[Soundguy]

oil that looks emulsified at working, but fine after setting is sucking air and foaming.. i'd deffinately be looking at that external line to the pump

 

[lcarver]

would you think that an air leak would have to be above the oil level in reservoir since it does not leak when engine is stopped?

 

[Soundguy]

may only leak with a few psi suction..

 

[lcarver]

Having trouble determining what kind of seal is in suction line at reservoir and at pump. Ford dealer has no info on pump nor does NH. Would like to order seals before dis-assembly . Anyone have info on gear type engine mounted pump? not sure that this is source of air leak but seems a likely spot to start.Thanks for looking.

 

[bobflange]

My understanding is that there are a few different ways the hoses can connect to the pump, and the seals are different as a result. Haven't done it, just passing on what I have read. You may need to just get it apart, then order the parts.

 

[Soundguy]

i think i'd spray both areas clean with brake cleaner.. wipe up good with clean paper towel.. then put some clear silicon liberally over both fittings and allow to cure. make a bead completely covering the nuts and pipe to sump..

this is atest.. not a fix.

after curing for a couple hours.. go run her for a few minutes and see if the oil foams. if so.. keep looking.. if not.. then peel the rtv off and disassemble and repair.

 

[lcarver]

Thanks, sounds like a great idea, I will give it a try this weekend.

 

[jimsart53]

where should i check the pressure on the lift system i rebilt my pump and now my
lift wont work.

 

[Soundguy]

you CAN pressure test by chaining the upper lift arms to the axle trumpet and then screwwing in a 3000 psi gauge into the plug hole on the top of the 3x5 cover on the hyd cover. if there is a wydro valve ther einstead.. just adapt a QD to fit the valve with gauge and non chaining needed.. just pressurize the port the gauge is in.

that said.. 'pressure' may not be your issue.

first.. ensure flow. pull that plug and see if you have oil there cranking over or running.

if yes.. and no lift.. sticky unloader is a possible cause.

 

[bobflange]

FYI I ended up solving this same problem on my 3400. Ended up being a pinhole in the hard suction line on the outside of chassis that caused the chatter. Temp fixed by getting a piece of rubber and a hose clamp on it (low pressure). Leak was so small I couldn't even see it (hard area to see), but that definitely was the problem and all the issues with the 3pt stopped when I put it on.

My leak was in the part of the line just to the left of your right foot as you sit on the tractor. The lines make an abrupt 90 degree and had been touching each other in that location, i'm sure vibration eventually wore through the one. Got a piece of rubber between them to prevent it in the future.