Hydraulic Q's

[grumpygrady]

maybe i missed it somewhere but what brand and model do you have?

Originally Posted by tman1986

Hey i just got my first excavator and i have a couple question's about the hydraulic system that hopeully someone here will be able to help me out with

1. is it possible to put too much oil in the system, is there suppose to be some air (as cylinder volume isn't the same both ways) in the resevoir, for instance i put oil in with all cylinders while they where compressed, ran it, put more oil in with cylinder extended ran it, but notice drop in power and that my resevoir would actually move from im guessing pressure build up when the cyinders compressed, i allowed a bit of oil to come out the breather and power was increased but im not sure about what im doing here... any tips would be great

in other words how do i know when i have enough oil in my hydrualic system

2.whats the proper way to use the breather on my resevoir i know what it does but what is it's purpose, is it simply for relieving pressure for opening the system, or is it vital in the proper function of the machine while it's running
again any tips would be greatly appreciated

i may have some more Q's in the near future but i figured i would start here as ive read through many many forums and threads but could not find specific answers to these questions

The machine im talking about is the rc4wd earth digger btw i was sceptical about purchasing it cause it's from china i thought the quality wouldn't be up to par with other models but i must say every aspect of this machine greatly exceeded my expectations, i haven't seen much written about it by anyone who bought one here or anywhere for that matter so if anyone has any Q's about it i would be more then happy to answer

just a bit about it,
i was told i got version 1.5 it's valve block is different from most i've seen it's 3 spool but has 4 servos one is switch operated to relieve some pressure in the system along with the main pump switch make's it seem pretty efficient, one way for show and moving the boom around almost zero strain on motor, flip the switch and full power through the pressure valve for digging, i thought that was neat and unexpected, sorry i had to mention it

Thanks for any and all replies
Trevor

[tman1986]

Hey, lol sorry about that i could've sworn i mentioned it but reading back i obviously haven't, it's the rc4wd earth digger, i just couldn't justify the $4000 price difference for a machine with less power, and i wanted something with replacement parts readily available in the US, so the choice was quite simple for me and i couldn't be happier

any one know a good place to get proper scale vinyl construction equipment decals?

Thanks
Trevor

[tman1986]

Hey i was just wondering if anyone could shed some light on my question about filters

*Quote*
lol, i feel like i'm going in a bit of a circle but if the black hunk of metal on my servos is the pressure relief valve, then where is the filter? and if there isn't one wheres the best place to get one? and where would be the best place to put it in this system?

There are some pics of my system a couple posts up,
sorry for kinda hovering on this but i really dont wanna run my machine no more if it doesn't have a filter and everywhere else ive looked and asked has just brought me to dead ends

Thanks for any info
Trevor