• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Etnyre chip spreader chaos

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,362
Location
Oklahoma
I got to repair this big ugly yesterday.
Etnyre chip spreader.jpg
This is a 2004 model, sold to a county here in Oklahoma. This was an auction machine bought by a "equipment dealer" AKA "a company that buys auction crap, fixes a few things, and sells it for profit". The machine was delivered to the county less than a month ago and they tried to use it........but the park brake kept applying and the hydraulic speed was uncontrollable. The seller spent the last 3 weeks replacing parts ...........almost everything having to do with the park brake: pump; solenoid valve, pressure sensor, and a VCU recalibration. Not sure how many $1000.00's spent so far and NO FIX.
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,362
Location
Oklahoma
The first thing I got was the electrical and the hydraulic schematics from Etnyre and had them blown up to poster size so I could read them. After talking to the operator and the county commissioner about the symptoms, I decided to start with pressure checking the brake system. I tee'd into the service brake line and got 250PSI.......low pressure since it is supposed to be spec at 400PSI (operates off off pump charge pressure.) So next I remove the park brake line at the park brake (spring applied, hydraulic release).Etnyre guage.jpg
Notice that I have a 1000 PSI guage on the line. I'm looking for 400PSI when the park brake is disengaged. Hit the switch............NOTHING. Hit it again several times......NADA. I then look down at the park brake line through the floor panel (The end that is hooked to the hydraulic manifold) and I can see it flex with the switch every time. HMmmmmmmmo_O
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,362
Location
Oklahoma
SO.........I engaged the hydraulics and guess what?! I get pressure at the park brake line...........plenty of pressure, as a matter of fact , it dam near blows my gauge apart. Bent the needle and ruined my gauge. Interesting!! SO I decide to trace the hoses out and find the other end of the park brake line hooked to..................
Etnyre compensater.jpg
THE RIGHT SIDE OF THE PUMP COMPENSATOR! LMAO
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,362
Location
Oklahoma
Well, this is definitely NOT right..........so I go to the hydraulic manifold and find the park brake outlet......
Etnyre park brake.jpg
Marked as PB of course, THIS hose should be the one at the park brake housing. SO why did I get a huge blast of pressure at my park brake line when I engaged the hydraulics you say? I trace the above line to answer this question.
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,362
Location
Oklahoma
ITS because...........it is plumbed in at................take a wild guess here!................
Etnyre LS1.jpg
ITS LOCATED AT LS1! LMAOO!!!!!!!!!!!!!!!!! Switch the 2 lines where they are supposed to go and WAHHLAAAA, problem solved!
SO.........the moral to this amazing story is "DO YOUR OWN TROUBLSHOOTING REGARDLESS OF WHAT YOU ARE TOLD!" MAN, I LOVE my job!!;):D:p:cool:
 

BigWrench55

Senior Member
Joined
Oct 11, 2018
Messages
1,176
Location
Somewhere
Electrical and hydraulic problems are my favorite ones to solve. Because when you find the problem and fix it you are the hero. And no matter how well you explain how you found the problem and what you did to fix it. If it happened again tomorrow they still couldn't fix it. Good job on finding the problem.
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,362
Location
Oklahoma
Electrical and hydraulic problems are my favorite ones to solve. Because when you find the problem and fix it you are the hero. And no matter how well you explain how you found the problem and what you did to fix it. If it happened again tomorrow they still couldn't fix it. Good job on finding the problem.
I drove 3 hours to fix this in 1 hour. These are the perfect jobs! I wish I had 100's of these lined up!
 

Nige

Senior Member
Joined
Jun 22, 2011
Messages
28,984
Location
G..G..G..Granville.........!! Fetch your cloth.
Just a thought but that's a perfect use for a Tetragauge when you have no idea what pressure is actually in a system, although you may have an idea of what OUGHT to be in it....... With the biggest gauge range of 5000psi you're never going to wind it off the clock.
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,362
Location
Oklahoma
How much
Just a thought but that's a perfect use for a Tetragauge when you have no idea what pressure is actually in a system, although you may have an idea of what OUGHT to be in it....... With the biggest gauge range of 5000psi you're never going to wind it off the clock.
is one of those now?
 
Top