Hi all attached a new grapple bucket got everything moving ok the lines leaked at the couplers but was just loose moved one load and was trying for a second then the hydraulic oil started blowing out of the couplers fittings that has a hole drilled into so guess it’s some relief valve for high pressure do I need to install a flow restriction valve on the intake line like I did with snow plow before will the couplers need to be replaced also or do they reset somehow photo of the couplers with holes
If it's leaking out the fitting connection you might have a blown o-ring if it's an ORFS fitting.
The fitting needed tightening when first installed and everything was fine for 10 minutes then when closing the claws it started blowing fluid out of the hole in the nut by the elbow it’s about 1/8 inches I think it might be a pressure relief if it’s too high to save blowing the seals out of the cylinders haven’t seen holes there on other couplers
It is not a pressure relief valve. Looks German aber ich vergessen. Looks like you have fittings put together with the same threads but different seats. One is for a compression fitting and the other is not.
This setup came from the factory and would work except oil starting blowing out the little 1/8 holes that are drilled in the nuts by the elbow looks like they were drilled from a purpose would work fine if the oil didn’t blow out of the hole
Think your problem is fitting difference not a relief hole. I thnk Tenwheeler is onto the real problem . Something wrong with connection angles. Simon C
Those holes appear to be located below the point the two fittings seal together. You already have relief valves located on the machine.
Think I’ll replace the nuts with holes in them and install a restriction valve and see how that works
This thread is confusing me. The snow plow needed its own pressure relief, to protect the plow itself. Those quick connects, with the extreme pressure holes, I have never seen. Wondering if they are like an over pressure hole in guns by the chamber, in the event of an over pressure situation. Or are they designed to help bleed off pressure, for easy connection.
Never seen before either my guess is some sort of feature that blows out if pressure or flow is to high to protect the cylinders on the grapple I’m going to take apart and see what happening maybe can find some nuts without holes to put on
Believe the holes are for wiring up the connection to a mating connection that has a hole in it as well. Not a pressure relief from all my experience. Maybe I am wrong. Simon C
You're way overthinking this. If the fittings have o-rings, replace them. If not, replace the fittings and put it back to work.
Great idea, but may not have o-rings and maybe the fitting is some oddball. I remind myself that if I am not there, might not be available parts for a week or more. Hopefully it is some simple O-Ring fix.
That's the trouble with attachments, so many of them use those European fittings that nobody stocks.
Happy to report just took the couplers apart reinstall the nuts on different threads and tightened them in so the holes are opposite sides used few hours and all good was brand new guess they weren’t that tight maybe moved a little in use and the holes lined up and blows fluid out never seen before and don’t really know what the purpose of it is but all’s good now thanks for the replies
I know of a mechanic who was working at a reserve 800 miles north of Thunder Bay on a generator that needed 1 bolt super long and fine thread. He ordered the bolt by parts book, when it got to him, wrong thread. Bolt had been put in wrong bin. A mechanic made sure on the second bolt. $ 2000 later for 2 plane flights, he had the right bolt to finish the job. A small peerson could never afford that kind of error. Parts problems can be difficult to get or figure out. Simon C
Next job going to be finding tracks for the old girl got buried pretty deep luckily got out other backhoe down for the moment too
I really thank that is for a drive pin to prevent axial movement. Nothing to do with holding pressure.
That is one bad ass looking grapple!
Definitely. Looks like good fit on that machine. Would caution on putting tracks over tires. I’ve been told it’s hard on it by locking the wheels together. Maybe others can chime in if that’s true?
Had the over the tire tracks on a Cat 236B that belonged to a lady that I worked for. They were on it from 500 hours to around 2500 hours and had no problems. Of course it probably depends on what kind of material you run on and how hard you counter turn versus 3 way turn. The driver can make a huge difference on how hard tracks are on a machine. Simon C
I’ve heard that before being hard on the tires have to ask a buddy has the same machine with tracks not sure if he’s over the tire or has full carriage I would only be running on mud and gravel though have broken a main drive sprocket on my other skid turning on asphalt with a heavy load
Tracks can be a problem especially on long wheelbase machines. In mud or soft conditions they are fine but if driving over stumps or rocks or anything that fits in-between the tires puts excessive pressure on the axles. Seals could leak or worst case could break an axle. Learned this from a long time skid steer dealer years ago.