Hydraulic pump weak

[Ranch_Hand_Supp]

Yes you are right, it was the differential I was just calling the whole mess the tranny.

I guess I am a fool then cause I'd take the bet.

The tranny and the differential don't share the same oil.

Ronald

 

[Ranch_Hand_Supp]

The tranny and the differential don't share the same oil.

Ronald

DwayneB, My post was a question... I left off my question mark.



If I only had a brain......

Ronald

 

[Eagleview]

Leave the 15-40 in it forever , there is nothing wrong with using it (and i did say if your sure it is worn out and just want to give it a little pep). We in Australia use it in everything , truck and tractor transmissions , engines , hydraulics and all , some manufacturers recomend it , ive never heard of a complaint . We would not be able to change gears with a 90 weight in our gearboxes on cold mornings so we all use 15-40 and on hot days 10w hydraulic oil losses it's viscosity so we use it in the hydraulics , Caterpillar dozers use it from one end to the other .

 

[DwayneB]

DwayneB, My post was a question... I left off my question mark.
If I only had a brain......
Ronald

Yes they share the same oil

 

[lakespirit]

Answers to some questions:

1. I don't know the pressures, and don't yet have a guage. How do you hook it up, and where?
2. The 3PT rear end arms are slow also.
3. Yes, I did put in the 15w/40, and it improved the speed a bit.
4. The 2 valves (one under the seat and the other is just above the outlet to the filter) to regulate the loader and the one for the rear 3PT arms are wide open.
5. When the system is cold it works faster...don't know if that helps.
6.

 

[lakespirit]

There is no item 6.

 

[greg_g]

1. I don't know the pressures, and don't yet have a guage. How do you hook it up, and where?.

Unless your dealer used it for something else, there should be a small pipe sticking out the side of the lift box. It's about 1/2" pipe, comes out about 2 inches, then makes a 90 degree bend, and is capped off (or might have a QD connector). That's one place, but you have to turn a hex head valve to direct flow to that pipe. While flow is going to that pipe, it will not be going to the loader and rear lift.

If the rear lift speed is as slow and reluctant as the loader, then your original diagnosis of "weak pump" is likely accurate. You have not mentioned visible leaks anywhere, but have you perhaps noticed low fluid level in the lift box? If yes, does it correspond with unexpected higher levels of gear oil in the rea end? With the hydraulic dipstick out, can you see air bubbles in the fluid when operating the lift/loader?

About the 15W40, it's your choice. Personally, I wouldn't even think of leaving it in there. If it hasn't already, it will emulsify soon.

//greg//

 

[lakespirit]

On the 2 valves I mentioned. Does having both open have an affect on my system even though there's nothing running on the capped-off pipe you decsribed? So if I understand, I would put a pressure gauge on the end of the capped pipe? Then what's the process for checking the pressure?

I don't see an excessive amount of oil leaking anywhere, and I hadn't thought to check the differential level, but will do so. Although I don't seem to be adding oil to the hydraulic tank.

 

[lakespirit]

So if I decided to upgrade to a more powerful pump, is it a huge deal to pull the old one and put the new one in? Would it bolt into the place the old one is?

 

[lakespirit]

Unless your dealer used it for something else, there should be a small pipe sticking out the side of the lift box. It's about 1/2" pipe, comes out about 2 inches, then makes a 90 degree bend, and is capped off (or might have a QD connector). That's one place, but you have to turn a hex head valve to direct flow to that pipe. While flow is going to that pipe, it will not be going to the loader and rear lift.

If the rear lift speed is as slow and reluctant as the loader, then your original diagnosis of "weak pump" is likely accurate. You have not mentioned visible leaks anywhere, but have you perhaps noticed low fluid level in the lift box? If yes, does it correspond with unexpected higher levels of gear oil in the rea end? With the hydraulic dipstick out, can you see air bubbles in the fluid when operating the lift/loader?

About the 15W40, it's your choice. Personally, I wouldn't even think of leaving it in there. If it hasn't already, it will emulsify soon.

//greg//

Why would the oil emulsify there and not in the crankcase? Isn't water the culprit that causes this?