773C Hydraulic Lift and Tilt concerns. HELP Please

[450rmaniac]

Hey guys, Not really new to the thread but new to posting. I have been able to solve a lot of my questions or concerns by simply searching and reading. Unfortunately I cannot find the solution or answer to the current issue I have with my 773C. The issue I've been experiencing is when I am moving snow (stock bucket). When I push into a pile with a full bucket of snow and lift/dump the trans light comes on and my hydraulics make a slight groan sound and my tilt pedal vibrates slightly. This only happens when I am lifting near the top of my loader's reach and tilting/dumping at the same time. If I take the dump slow it doesn't always do it. The light that I believe is the trans light is the bottom light on the left side in the old f style cab is the one illuminating... I have changed the hydraulic filter at the back and the breather cap on the top of the reservoir tank. I also made sure the level in the reservoir was at the full line. I have 3800 hrs on it currently. I am praying that my pump isn't going bad. I have a complete service manual in .pdf form and have looked it over multiple times trying to pin point my problem. Question: Is there any other filters for the hydros other than the big filter in the engine bay? Thanks for all the help. Mike

 

[Tazza]

The only other filters should be the round can ones inline with the small hoses from the drive motors. These are your case drain lines. I don't think this is causing you rissue though.
My 743 did this, you could feel the pump bite at the hand controls when it did it. Only when i was dumping a heavy load of dirt, the light would flicker and you could feel it grab.
I don't know if it is because the oil was hot and thinner or not. As long as it doesn't do it all the time, you should be ok.

 

[450rmaniac]

The only other filters should be the round can ones inline with the small hoses from the drive motors. These are your case drain lines. I don't think this is causing you rissue though.
My 743 did this, you could feel the pump bite at the hand controls when it did it. Only when i was dumping a heavy load of dirt, the light would flicker and you could feel it grab.
I don't know if it is because the oil was hot and thinner or not. As long as it doesn't do it all the time, you should be ok.

Thanks for the reply. It isn't doing it all the time. It does seem to do it more when it is being worked.

 

[samsonite]

Thanks for the reply. It isn't doing it all the time. It does seem to do it more when it is being worked.

Our 773c will do the same thing, but you have to be working it fast and hard. It started doing it a few hundred hours ago but has not gotten any worse. It feels like a system relief valve to me. You can really feel it in the sticks though.