Reusable hydraulic fittings on wreckers

[LCA078]

I read a lot on SS that 5-ton wreckers (M936s for sure and maybe M816s) came with field repairable or reusable hydraulic fittings. But when I look on pics of M936s for sale, I don't see the kind of reusable fittings I'm used to seeing that have wrench flats where the crimp would be. I found a NOS hose on ebay (no relation to seller) that says its from a wrecker and the NSN checks out too but I don't think those are reusable fittings. I think those are crimped fittings and it's what I see in most pics of M936s so what am I missing?

 

[87cr250r]

The fittings you have described are the Parker 20 and 22 series field attachable fittings.

 

[LCA078]

The fittings you have described are the Parker 20 and 22 series field attachable fittings.

Yes- thank you. A quick google showed those are the style of reusable fittings I'm used to seeing around. They have the flats for a wrench where the crimp would be. I tried to download a pic of them to show here but the format wasn't correct for an upload.

But with all the discussion on reusable fittings on wreckers, I'm not sure if the wreckers came standard with reusable fittings or if folks added along the way. More curiosity than anything else as I just haven't seen a wrecker for sale with what I think are reusable fittings.

 

[Mullaney]

Yes- thank you. A quick google showed those are the style of reusable fittings I'm used to seeing around. They have the flats for a wrench where the crimp would be. I tried to download a pic of them to show here but the format wasn't correct for an upload.

But with all the discussion on reusable fittings on wreckers, I'm not sure if the wreckers came standard with reusable fittings or if folks added along the way. More curiosity than anything else as I just haven't seen a wrecker for sale with what I think are reusable fittings.

.
Generally speaking, the hose fittings are going to be crimp-on style from the military.
Local hose shops will generally use crimp-on fittings as well...

Having a roll of hose and a bag full of "skive" type installable fittings are always a nice way to make your repairs.

 

[Jbulach]

…But with all the discussion on reusable fittings on wreckers, I'm not sure if the wreckers came standard with reusable fittings or if folks added along the way…

Bump up the threads you’re reading with reusable fittings, or drop a link here, and we can try tracking down who maybe able to answer this question.

 

[LCA078]

Reusable hydraulic fittings - worth the extra cost?

I need to run some hydraulic lines to various components on my truck. I have deleted the air over hydraulic pump. I am interested to hear opinions on the following: 1. Are reusable hydraulic fittings too expensive to justify? 2. Where do you find best prices? 3. Are these fittings reliable...

www.steelsoldiers.com

M936 Hydraulics - or - How Fast Can An Old Fat Man Move!?

In the continuing adventure, today as I was retracting the Jib - nice and easy - I had a line break. The one that controls "IN" on the Jib Cylinder. It is amazing how fine the spray can be and how far it goes! What was really amazing was how quickly I got up out of the gondola, took three...

www.steelsoldiers.com

Here's a quick couple posts about mentioning reusable fittings on wreckers. I've seen more posts but these more or less explain my questions.

 

[Jbulach]

Reusable hydraulic fittings - worth the extra cost?

I need to run some hydraulic lines to various components on my truck. I have deleted the air over hydraulic pump. I am interested to hear opinions on the following: 1. Are reusable hydraulic fittings too expensive to justify? 2. Where do you find best prices? 3. Are these fittings reliable...

www.steelsoldiers.com

M936 Hydraulics - or - How Fast Can An Old Fat Man Move!?

In the continuing adventure, today as I was retracting the Jib - nice and easy - I had a line break. The one that controls "IN" on the Jib Cylinder. It is amazing how fine the spray can be and how far it goes! What was really amazing was how quickly I got up out of the gondola, took three...

www.steelsoldiers.com

Here's a quick couple posts about mentioning reusable fittings on wreckers. I've seen more posts but these more or less explain my questions.

I think the top link is all irrelevant stuff, FMTV hydraulic cab lift, and jacketed air lines…

@Mullaney s wrecker looks like a mixture with the uppers being reusable, likely replaced the crimp hose in the “field” by the motor pool guys when his cover was smashed?

@Csm Davis may have some useful input.

 

[Jbulach]

I just made an interesting observation on both of my A2‘s, but they are not wreckers. 90% of the rubber lines or braided, air, power steering transmission are reusable fittings. However, all of the hydraulic lines that I can see for the winch system on my M925 are all crimp fittings.

 

[LCA078]

I think the top link is all irrelevant stuff, FMTV hydraulic cab lift, and jacketed air lines…

@Mullaney s wrecker looks like a mixture with the uppers being reusable, likely replaced the crimp hose in the “field” by the motor pool guys when his cover was smashed?

@Csm Davis may have some useful input.

Good catch on the first link being for non-wrecker stuff.

On the second link, post #8 Wes says "those hoses have reusable fittings on it as designed from the military so you don't have to have ends crimped on. Just simply replace the hose." Wes is pretty accurate so I'm reading it as the wreckers came with reusable fittings from the factory. Maybe I'm reading it wrong or it's a simple mistake.

Either way, it's just a curiosity thing regarding what wreckers were originally outfitted with. The NOS hose I show in my original post is what I consider to be crimped fittings and I was really just verifying those are crimped and I'm not missing something.

 

[87cr250r]

The field attachable fittings are more expensive but lately my local hose shops have been charging $60-90 to crimp a hose. In this case the field attachable can often become the less expensive option.

One thing to keep in mind is that the field attachable fittings are only available for braided hoses. Braided hoses are for constant pressure applications. If you have a high impulse application or a hose that needs a longer fatigue life you'll have to use spiral reinforcement with crimp on fittings.

 

[juanprado]

I gu

The field attachable fittings are more expensive but lately my local hose shops have been charging $60-90 to crimp a hose. In this case the field attachable can often become the less expensive option.

One thing to keep in mind is that the field attachable fittings are only available for braided hoses. Braided hoses are for constant pressure applications. If you have a high impulse application or a hose that needs a longer fatigue life you'll have to use spiral reinforcement with crimp on fittings.

I must be getting old.......... In another lifetime at Napa I made a gazillion hoses and the labor was $5-10 per side plus fittings and hose.........

 

[LCA078]

@Jbulach I just saw your post #8. That is a very interesting observation about the mix/match of reusable vs. crimped hydraulic lines. My only guess would be the Army viewed the crane as dangerous if a fitting failed so they went with all crimped on the crane system to eliminate Soldier-induced failures from badly assembled fittings. The rest of the stuff is okay to repair in the field in order to self-extract back to safety as needed.

 

[Csm Davis]

Most of the largest lines are crimped, will have to check on smaller lines and see. Will be next week before I get back to my wrecker.