I work at a plastic injection shop and I have a question about making our own hoses. We would be looking at making 3/8-1/2” id hoses with male and female ends. What type of press and die’s would we need to purchase? Preferably sub $6,000 as our shop CFO is a penny pincher.

For those of you who size hydraulic lines and plumbing, I was curious on what minimum safety factor you typically stick with. For hose, I know the max pressure is based on 4:1, and that is usually what I use for tubing and pipe as well. I pretty much exclusively work on industrial systems rather than mobile, so it might be different. Any of you use something different?

As a disclaimer, I am not asking for a professional recommendation.

Hey Everyone,

I ordered a pump through an Eaton / Danfoss distributor in July, due in October.

They are telling me they have no updates on it because they are shut down because they are switching to a new operating system?

This sounds like BS to me. Anyone have any information on this?

I'm trying to build a ram pump following plans sure as this one or this one.

4" PVC pipe and fittings for the pressure tank seem to be quite expensive; 2 feet of 4 inch pressure PVC pipe, cap, and reducer bushing are already $40. It also needs an inner tube, which I feel will leech rubber into the water (and I think the Schrader valve might rust?).

Can I replace the PVC pressure tank with a water tank such as this one, which is only $35, and actually designed for potable water? Will the 1/4" input be too small?

Alternatively, rather than a pressure tank, can I use an expansion tank such as this one? It connects via 3/4", is that still too small? Will a 2 gallon expansion tank have enough water capacity as a pressure tank?

If I use a pressure or expansion tank, what air pressure should I set it to? Something like 5-10 PSI?

Boom lift - leak at immersed hydraulic reservoir heater, appears to've been leaking previously and RTV was applied. What is the best/proper sealant for external sealing of this heater? Field repair and it's not possible to remove it and have a spill.

Can anybody point me to any resources where I can learn how to setup a pressure switch to turn off a motor pump set once a pressure is reached and then switch the motor back on when another pressure is reached?

I don't want to spend weeks learning about electrics or PLC programming although, once I understand how to set up the above I would definitely like to build on the knowledge.

MAY I ASK what it mean It read skf K3A-2 USA 1.500 Please

Do any of you all have any recommendations for a good set/individual wrenches for removing gland nuts? Looking for recommendations for face pin style wrenches and hook style wrenches.

Please provide links or brand recommendations. These are for a shop setting, so looking for good quality/durability.

Thank you!

A shipyard down the river from the one in working in today had an accident with a shipboard hydraulic operated elevator.

Details are few right now, but there are two confirmed fatalities.

Be safe.

Can’t figure out if it’s just a case of tapping off the piston or not? Any ideas?

Sorry for possibly a stupid question, I'm completely new to hydraulics.

I just bought an old farm tractor with a loader. The loader wasn't installed when I bought it, I am trying to get it installed before the snow flies. The lift cylinders are single-acting, and the bucket has a double-acting cylinder. The tractor came with a brand-new 2-spool double-acting valve. Is there a way to use it with the single-acting cylinders?

Here is the valve

Thanks in advance

Lots of mobile equipment posts in here, and some sharp people commenting.

Anyone do large stuff? Just got done on an overhaul on a system with the 4x Denison P24 Gold Cup pumps.

Long story short -

I was assigned to refit a tractor trailer setup so that our rental tractor could hook into a city Department of Public Works trailer, which is used to haul trash. The city's trucks don't have hydraulic tanks, but their trailers do. Our truck has a hydraulic tank, so is it possible that something is rerouting itself because of the two different systems? I'm kind of at a loss.

Thank you in advance for your insight and tips!

Not sure if this is the right place to ask but I can’t find the information in any manuals or on YouTube so I’m asking here.

I’m trying to remove these two brake cylinders so I can replace the seals inside them, but I’m not sure if I need to flush the hydraulic system first.

I’m airing on the side of yes absolutely for this question, but I’m gonna have to do some shenanigans (the drain plug for my lift is located such that I have to basically lift it off the ground with my forklift) to drain it, so I want to make absolutely sure I’m right in assuming that before I go through all the effort.

I’ve seen a YouTube video where the guy has the cylinder off already, and just kind of (poorly) explains what he did, but he never mentions draining the hydraulic fluid one way or the other.

This is a Skyjack 3220.

Thanks!

I got a Vickers kdg4v closed Center. Planning on making a hydraulic press with a joystick type control arm, pressure transmitter and a tablet, possibly dial in pressure. So I've got a few problems.

1. Closed Center is definitely not the normal for a press, most do open Center and continuously run the motor. Jim pytrl on youtube suggest using vfd, plc and/ or pressure transmitter to shut off motor when flow is not needed. Any ideas how to accomplish that? Or how to wire?

2. The other option is to get a variable displacement pump, but this seems more intimidating trying to figure out the circuit and how to set up. I already have a gear pump and a proper piston pump will probably be north of a grand, and I'm not sure if it will give me any better functionality. What do you think?

3. Can I control the the proportional valve with a PLC directly or do I need a amplifier?

4. Could I use a manifold or some type of sub plate to provide a pass through to pressure relief and tank? It seems like you could turn this valve into a open Center with the right sub plate. But looking up Basics on valve Stacks I cannot find if this is even possible. The lack of information on Hydraulics is frustrating.

Thanks for any help guys, slowly stumbling through this mess of a project but I will get it done if I have to do everything on trial and error