hydrolic leak...?

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lad1631

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i just purchased a 2000 gehl 4835 and the hydrolic arms seemed to drip mabe one drop an hour when moving arms up and down . Should this be a concern or is this standard lubrication for the arms. machine has 4600 hours. i notice when i lift the bucket back i hear a humming noise. i just bought this machine and have some new eng and hydr oil on the way amsoil.
 

Tazza

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There will always be a humming noise from the pumps. They range from a squeal to a hum, the squeal should only be heard under heavy load while turning, not while stationary.
The leaking rams should be fixed, a simple seal kit will fix the leak. Leaks are a possible entry point for dirt and air.
 
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lad1631

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There will always be a humming noise from the pumps. They range from a squeal to a hum, the squeal should only be heard under heavy load while turning, not while stationary.
The leaking rams should be fixed, a simple seal kit will fix the leak. Leaks are a possible entry point for dirt and air.
Is this a easy fix can i do it myself? I see a circle window but i doent see any fluid i could be low? I am waiting for my operators manual want to fix the leak before i change the fluid over havent ran the machine since to be on the safe side.
 

mllud

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Is this a easy fix can i do it myself? I see a circle window but i doent see any fluid i could be low? I am waiting for my operators manual want to fix the leak before i change the fluid over havent ran the machine since to be on the safe side.
Hydraulic cylinders are basic mechanics. Handle the shaft with care. any nicks on dents will cause leaks. look for nicks or dents an buff off the high spot with emery cloth. keep everything very clean.Disasemble with care and lay your parts out in the order as they were removed.Make sure your seals are installed in the same direction as removed. Mike
 

Tazza

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Is this a easy fix can i do it myself? I see a circle window but i doent see any fluid i could be low? I am waiting for my operators manual want to fix the leak before i change the fluid over havent ran the machine since to be on the safe side.
It is quite simple to change ram seals, it just takes a little time. The hardest part is uslayy getting the ram out of the machine to work on it! If you see no oil at the sight glass it sounds like its a bit low.
 
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lad1631

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It is quite simple to change ram seals, it just takes a little time. The hardest part is uslayy getting the ram out of the machine to work on it! If you see no oil at the sight glass it sounds like its a bit low.
god know when they last changed the hydr oil. were is the drain plug for the machine located? what kinda oil do they recomend? iso 46...? do i need to bleed the fluid after i fill the resi? im doin motor oil next but hydr fluid seem to need tlc for now
 

mllud

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god know when they last changed the hydr oil. were is the drain plug for the machine located? what kinda oil do they recomend? iso 46...? do i need to bleed the fluid after i fill the resi? im doin motor oil next but hydr fluid seem to need tlc for now
I dont own a GEHL. On wy New Holland there is no drain plug. You may have to take your suction hose loose at the bottom of the tank to drain. That would be the hose that goes from the tank to the pumps. You dont need to bleed the system if the oil level of your hydraulic resovor when you fill it is higher than your pump.If the pump is higher than the resivoir. Then check the dealer or a manual. Re check the oil level after a short run. Operate your boom up and down and your bucket back and forth to work any air out.Hope someone comes on with oil type and drain info. Mike
 
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lad1631

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I dont own a GEHL. On wy New Holland there is no drain plug. You may have to take your suction hose loose at the bottom of the tank to drain. That would be the hose that goes from the tank to the pumps. You dont need to bleed the system if the oil level of your hydraulic resovor when you fill it is higher than your pump.If the pump is higher than the resivoir. Then check the dealer or a manual. Re check the oil level after a short run. Operate your boom up and down and your bucket back and forth to work any air out.Hope someone comes on with oil type and drain info. Mike
would a slow leak effect the machine preformance as far as hydr power ? such as lift cap ect... ?
 

mllud

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would a slow leak effect the machine preformance as far as hydr power ? such as lift cap ect... ?
If your talking about the Cylinder it wouldnt affect preformance. The volume of fluid and the pressure behind it should overcome a leak unless you lose enough fluid to starve the pump. Mike
 

mllud

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If your talking about the Cylinder it wouldnt affect preformance. The volume of fluid and the pressure behind it should overcome a leak unless you lose enough fluid to starve the pump. Mike
One drop an hour is next to nothing. Leaks could effect preformance depending on where they are and how much leaks. Any leak is loss of pressure and wasted energy.Most older machines leak a little somewhere.. Its a contant battle to prevent leaks as they age. Mike
 

Land-Tech

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One drop an hour is next to nothing. Leaks could effect preformance depending on where they are and how much leaks. Any leak is loss of pressure and wasted energy.Most older machines leak a little somewhere.. Its a contant battle to prevent leaks as they age. Mike
Sounds like a seal if it is leaking that slow maybe a loose fitting. Mine are what I would consider to be sweating,not enough to leak but enough to be be a dirt magnet, Gehl could have worked harder at designing seals for the pins, they have worn really well but puke grease out the sides more than I think they should so the machine is a mess. I have the info on what Gehl specs on another thread.thanks scott
 
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lad1631

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Sounds like a seal if it is leaking that slow maybe a loose fitting. Mine are what I would consider to be sweating,not enough to leak but enough to be be a dirt magnet, Gehl could have worked harder at designing seals for the pins, they have worn really well but puke grease out the sides more than I think they should so the machine is a mess. I have the info on what Gehl specs on another thread.thanks scott
i just bought the machine and the operators manual it should guid me threw fixing these seals. there not terrable. after fixing im debating i might sell it
 

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