Hitachi EX60urg Looses power after 45 min

[Wardiker]

I just bought a 1991 EX60 urg, Ive found after 45 minutes the unit looses power and runs a bit ruff. Replaced the Hydraulic fluid filter and fuel filter.
Still same results. anyone had experience with this kind of problem,
Its has been suggested to me that the hydraulic pump pressure regulator valve may be the problem and expensive to fix

 

[willie59]

I just bought a 1991 EX60 urg, Ive found after 45 minutes the unit looses power and runs a bit ruff. Replaced the Hydraulic fluid filter and fuel filter.
Still same results. anyone had experience with this kind of problem,
Its has been suggested to me that the hydraulic pump pressure regulator valve may be the problem and expensive to fix

Welcome to the forum Wardiker. :usa

"unit looses power and runs a bit ruff".

"It has been suggested to me that the hydraulic pump pressure regulator valve may be the problem and expensive to fix"

A pump problem wouldn't necessarily make it run rough. I'm not there listening to it, but it sounds more like a fuel delivery problem. Blockage in the fuel line from the tank? I've seen it plenty of times. Fuel lift pump going south? Could be that as well. I wouldn't be hasty and condemn the hyd pump until I checked that the fuel delivery to the engine.

 

[Wardiker]

Thanks ATCOEQUIP,
To be even more specific, when I load the hydraulics (i.e. removing a stump or engaging the tracks) it can stall the engine, when the hydraulic arms or bucket is fully extended to its limit it will drag the REvs down.
I hope its a fuel problem and that has been suggested to me as well.
Does that give more insight? I understand that I will have to get a mechanic to diagnose it soon.

 

[dozerdave]

Hi Wardiker,
I am not a mechanic but I ran a G1,000 Gradall for four years and it could be as simple as a grease rag in the fuel tank to a sticky bypass valve. A pressure check will answer the control valve problems if it has any.

 

[cps]

Hi wardiker,
( i just replyed to your post in anoter thread before i seen this)
But now that i've seen you got a URG model EX60 i can tell you to take of the engine cover between the boom and the engine ( it can be arkward) and follow the fuel feed pipes, still not sure were but you will find a banjo bolt holding on the fuel line (maybe around the lift pump) this will have a small filter in side it!

Like i said it is common on the EX60URG takes very little to block it up!

Almost sure this is your problem, As they say,I cut my teeth on one of these machines, great little tool!

Hope this helps CPS

 

[Wardiker]

Thanks CPS, I did take a look and saw a banjo bolt like you said, I removed it and dismantled it but saw no filter, it was clear thought. It was about 10 inches from the fuel filter (which I also noted had a couple of bajo bolts) right where you said it should be. If its any help I have this unit on youtube at
http://www.youtube.com/watch?v=Yil6UL_SI4A
its running pretty good at this point but at 1:40 it does start to lug down a bit. When I was just there it seemed to lack power for the hydraulics right from the get go.

 

[willie59]

Hitachi has used those little plastic strainer screens on the banjo bolts of a number of models.

I think we need to try to determine if it's lack of fuel or excessive hyd load. You've used the terms "can stall engine" and "looses power". This will help us the most:

If it's a fuel problem (clogged line/screen, lift pump problem, basically starving for fuel under load), the engine should begin to simply slow down, horsepower drops, just like it would if you were running out of fuel. You let go of the load, the engine would labor to run for a moment, then it would slowly pick back up to the rpm it was previously at. That's generally a fuel problem.

Hyd/pump problem would be excessive load on the engine. Assume you have a malfunction of the hyd system that was causing the pump to produce more oil/pressure than is needed, it would put excessive load on the engine, more than it has horsepower to produce. The result is generally the engine starts slowing down, but is cranking all the horsepower and black smoke it can to try and keep up, until you release the load and it immediatly picks it's rpm back up and say's, "thank you for letting go, I was working my butt off back here!" Hope this helps ya a little.

 

[motrack]

My money is on the little plastic strainer in the banjo bolt. I recall that strainer is located in the banjo bolt going into the filter head.

I have seem many Hitachi running as you described because of this strainer pluged.

 

[Wardiker]

Problem Solved

Thanks everyone, you were correct it was a bizzare fuel line clog.
Someone added/replaced part of the fuel line, at the junction between the 2 the put in a metal coupler. They heated the old fuel line up so much it melted and when they pushed it onto the couple the plastic inner diameter melted into a ball and clogged the line.
Whew, ATCO, CPS, Motrack and the rest you know your stuff.

 

[motrack]

Glad you found the problem. Did you ever find the strainer inside of the banjo bolt? If may have been removed.

 

[AtlasRob]

Thanks everyone, you were correct it was a bizzare fuel line clog.

I have been advised this week that the Case CX130 has a very similar tiny filter in one of the banjo couplings with the resulting problem highlighted here.

I will expand on why I got told, in another thread shortly.

 

[Wardiker]

Banjo Bolt strainer

Yes I did find the strainer in the banjo bolt , there were 5 bolts and it was the last and most ackward one (of course), It was clean. We saw the fuel tank was very dirt in the bottom so removed the tank, pressure washed it and were about to replace the fuel line when we found the problem. You guys know yer stuff and I avoided a potential $6000.00 hydraulic pump rebuild which would not have solved the problem. Thats why we went atfer the simple stuff 1st. WOW do I feel great.

 

[willie59]

Yes I did find the strainer in the banjo bolt , there were 5 bolts and it was the last and most ackward one (of course), It was clean. We saw the fuel tank was very dirt in the bottom so removed the tank, pressure washed it and were about to replace the fuel line when we found the problem. You guys know yer stuff and I avoided a potential $6000.00 hydraulic pump rebuild which would not have solved the problem. Thats why we went atfer the simple stuff 1st. WOW do I feel great.

Well I'm glad you got it sorted out Wardiker, and you was able to keep your wallet in your hip pocket. Very smart washing out the tank. I'd feel pretty good right now as well. It's Miller time! :drinkup

 

[luc2121]

i'm a new member here and am looking at an ex60-2, how are these machines ? i couldn't start a new post so i used this one, i own 250 acres and am looking to buy either a mid sized excavator like the ex60 or a small dozer like a d21, some of the project on the to do list is to prepare a spot for the house approx 200yds x 200yds. the spot slopes upwards from the road ending approx 9ft higher at the rear, i need to move fill from the rear to the front , i also want to dig a couple of ponds. and level off the house area. i alreadt have a new holland tc45 with a small hoe, loader and a kubota 8950 with a 7ft loader and a 5ton dump trailer, trying to figure out what will be more usefull ? a small dozer or a mid size excavator ? the blade on the excavator can it push fairly well ? thanks in advance for everyiones help

luc

 

[Wardiker]

I bought my Ex60 for similar reasons, I have10 acres I want to develop. The blade is great but it wont replace a Dozer, its more for finishing. The Ex60 is considered a Midi-size excavator. I think that something like a 120 or 200 might be better depending on the size of the ponds you want to make and the buckets on those will doze the dirt better than the blade on the EX60. The EX60 is a great machine by all acounts and is treating me very well. I have a 26" bucket so it does cut a hole very well. Im pretty new as well, so let see what some of the veterans have to say, they really know thier stuff. Hope this helps

 

[Vantage_TeS]

Just a heads up (I'm sure if you were able to figure the fuel problem out you already know) but you're in desperate need of bushings and probably some pins. I noticed some pretty dangerous play in the bucket linkage and verticle stick pin (for the side shift).

Might wanna take care of that before you have to bring a welder in to build up the pin holes and re-bore everything.

 

[Wardiker]

Thanks Bud, I was aware of that, but I appreciate the heads up very much. Thanks again

 

[CaribooHarry]

How do you like the EX60 mow that you have the fuel problem fixed, my son has one and he thinks its great.

 

[swampdog]

i'm a new member here and am looking at an ex60-2, how are these machines ? i couldn't start a new post so i used this one, i own 250 acres and am looking to buy either a mid sized excavator like the ex60 or a small dozer like a d21, some of the project on the to do list is to prepare a spot for the house approx 200yds x 200yds. the spot slopes upwards from the road ending approx 9ft higher at the rear, i need to move fill from the rear to the front , i also want to dig a couple of ponds. and level off the house area. i alreadt have a new holland tc45 with a small hoe, loader and a kubota 8950 with a 7ft loader and a 5ton dump trailer, trying to figure out what will be more usefull ? a small dozer or a mid size excavator ? the blade on the excavator can it push fairly well ? thanks in advance for everyiones help

luc

That is not a mid-sized excavator; it's a small excavator.

How big are the ponds you want to dig, or are you just blocking off one end of a natural depression? For actually digging a pond, you want a large excavator - the bigger the better. And if you have 250 acres and want to prepare a building site of 200 x 200 yds, you also might want a larger machine.

Small excavators and dozers have their place, but mainly on small jobs with space restrictions. Larger machines can cut big jobs down to size; those jobs just look overwhelming if all one has is small machines.

If you want an excavator for working on a larger site, you might want to look for something in the the 200 to 300 size range. That's a mid-size excavator.

 

[luc2121]

loose track

i actually bought the ex60, seems like a good machine, wanted this size so i can still pull it behind a pick up if needed. the machine i bought seems to work fine so far except the the left track loosened up 2 times, i pumped grease to it to take up the slack but after 15 minutes of moving it around the track goes way slack, doesnt seem to be coming out of the grease nipple end, must be leaking at the seal, how do i remmove the cyl. ? do i take track off(rubber) and slide idler out of front ? or does it come out from bellow ? hard to see in there. any help would be appreciated


Luc