Dynamic (brand) two stage pumps

[SigElec]

Anyone running a Dynamic brand pump on their splitter. Surpluscenter.com has them listed for considerably less coin than the Barnes pumps. Info also says that they have roller bearing instead of needle bearing on the shaft end making them suitable for being belt driven if needed. I am going to build a splitter and had considered belt driven pump with idler/tensioner to kick the pump out for cold weather starting.

Any info on experiences will be appreciated.

 

[triptester]

I have no experience with these pumps but from the info I have seen they appear to be made in China. There are more clone pumps that will be showing up on the market.

 

[kevin j]

Dynamic and MTE are two alternatives to Haldex Barnes.
Both are aimed at the cost reduced splitter market and are copycat products. Haldex Barnes is a huge company, Barnes was originally a specialist in gear pumps and flow dividers. Two stage pumps had industrial applications way more and before log splitters. Their engineering and materials R&D;is for way larger goals than just splitters.

The knockoffs copy one specific higher volume product to get as much volume and profit as possible, without the overhead of design and research and service support, maintaining a good name reputation, etc. For the knockoffs, it is cheaper to just send out new parts to replace broken or failed stuff than to maintain quality control or build to a higher quality in the first place. That would never ever survive in the industrial world, where a product has to work always, and lost production is figured into the overall cost.

HF splitters are a great example: how many people speak glowingly of the fast, no questions asked replacement of pumps motors valves cylinders, thus rating them highly? I interpret it that HF is aware of poor quality, the parts fail at high rates, so they have no reason to doubt the callers story. Easier to send out parts than to solve the original problems.

So, after the ranting: a. I don't want to reward the pirates actions b. I don't want to support the china machine that will overwhelm us c. I don't want to support the big box mentality of 'build junk, the idiots will buy on lowest price' d. I want the machines I design or sell or own to work efficiently, and be reliable e. The pump is a small part of the overall cost. While an extra $50 for a retail store prices it out of the market, I am willing to pay the price.


think I need to go maul some wood.....
k

 

[Jags]

Come on Kevin, don't hold back. Tell us how you REALLY feel. :lol:

(good post though)

 

[kevin j]

I need to clarify: Dynamic is the china knockoff pump that irritates me. MTE is a reputable company, although slightly lower cost, but not the major price/quality difference than Barnes. Surplus center has MTE retail I think. I would still stay with Barnes personally. Tks to the PM who pointed that out.


Dynamic is the knockoff, and symbolic in a small way of the loss of manufacturing jobs, and copyright piracy in general, rampant in the global economy. Look at CD's, software, Honda engines, stihl and husky knockoff saw copies as small examples. Quality and safety of the toys, toothpaste, food products, drugs, etc recalled are of no concern.

Many more factors are involved: wages cost, pollution and safety regulations, medical costs, taxes, and more. There are no simple answers. Despite the rhetoric, and the american public's desire for quick painless answers, neither politcal party has a solution. The major upheavals in our economy and our lifestyle will likely continue as the middle class manufacturing jobs erode. I woudl expect all the readers know the local effects.

Anyway, my decisions won't change the world, and many products now have no option but made in china. However, for my own conscience and my kids futures, I try what small steps I can. I choose not to shop at Walmart, and avoid low quality products when I have options. That costs more money, and sometimes means life changes. but that's my choices.

Now I REALLY need to get some excercise. But will be a late night work day here.....

k

 

[SigElec]

Thanks for the info. I ran across the Dynamic pumps on surpluscener and had never heard of them. I figured with the price difference that there were quality issues and figured this would be the place to find out.

 

[Gooserider]

Just as a side note, Harbor Freight splitters use Haldex pumps, or at least mine does.... According to another poster, they tried looking the pump up via Haldex tech support, and were told that it was definitely a Haldex pump, but the number was a proprietary special pump made only for HF...

It looks like the Haldex pump on my friends splitter (purchased from Northern) except that the suction pipe is longer and has a 90* bend in it... I'm hoping that the bend can be swivelled cause that is the biggest thing that would slow down my reversing the engine on my splitter.... (currently the pump faces to the rear, so I have to get up and walk around the splitter to start it, or adjust the throttle, I'd prefer to have the pump facing forward so that the engine was easier to reach...

Gooserider

 

[triptester]

The hose barb suction tube on the Barnes pump is a press fit. Turning the tube may cause a air leak in the suction line. I had that problem with a pump and it require using an internal tube expander to get it to reseal.

 

[Gooserider]

The hose barb suction tube on the Barnes pump is a press fit. Turning the tube may cause a air leak in the suction line. I had that problem with a pump and it require using an internal tube expander to get it to reseal.

Well with the bend in it, I don't think that would be an option for my pump... I guess I could always fall back on the other alternative, namely the Sawzall treatment... (w/ a rag stuffed into the tube to keep the crap contained...) Will need to look into it further. Thanks for the info in any case.

Gooserider

 

[kevin j]

if you turn the engine around, will the exhaust or coooling air discharge be towards the operator? heat and noise issues?

One I use that I like best has the engine on the far side of the beam from operator, exhaust pointing away, air pointing away, and considerable splitter mass between engine and operator. Have to walk around for startup and shutdown but that's only few times a day. Speed is important to me so the rest of the day it runs at high idle all the time, I don't mess with the throttle. I suppose having it close would be an advantage in case of an estop condition.

k

 

[Gooserider]

The splitter came with the exhaust pointing down and to the rear, and the engine cooling air also blows to the rear. Since I operate vertically almost exclusively, that is pointing towards me... The exhaust was a trivial fix, it comes out the side of the muffler into a deflector shield, which is held on by three screws and can easily be rotated to any of eight or so positions by just removing the screws, turning the deflector, and screwing it back on... Took almost as much time to do it as it did to describe it...

The cooling air still blows towards me, which is sort of OK in cold weather, but not that great, and sucks when it's hot... It's especially bad when splitting a chunk that has a lot of dirt or punky crap, as it blows it all over you. This airflow is probably the biggest reason I'd like to switch the engine around. As you said, access to the controls is nice, but not a big deal since you really don't need them.

Gooserider

 

[kevin j]

I forgot, you've written that before, you run moslty vertical operation. I thought your reaons for change was access to the controls. you're already on the exhaust and air issues....

k