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garage man · 06-11-2021, 10:45 AM

My 93 Crown Royal 40' has the cargo doors like a bus. As they open they move out and then up parallel to the side of the coach. I think some call them pantograph doors.
None of the doors will quite stay up by themselves. All struts are 20" long but I need to know the poundage. One strut seller says they could be anywhere from 100 to 250 pound struts. I can't afford to buy and try as that can get expensive quickly.
Anybody out there no for sure what pressure I need? There are two struts per door.

MSHappyCampers · 06-11-2021, 11:17 AM

You would think that the make and part number would be visible on at least one of them! I assume you've looked closely at all of the struts?

garage man · 06-11-2021, 02:35 PM

Quote:

Originally Posted by MSHappyCampers

You would think that the make and part number would be visible on at least one of them! I assume you've looked closely at all of the struts?

That is the hard part. All of the struts are the same manufacturer and they have failed to come up with an answer yet. It may be that they are original struts but that would be 28 years old. Maybe they will come up with an answer. All I need is the pressure.

Snokid · 06-11-2021, 09:44 PM

Having just done this on my coach but with different doors.... Here's what I found if you look at the old struts in the part number there will be a nm rating, it might not even say nm after the number but it will be there(at least on all of mine there was a number) once you can figure out the nm of the strut just google nm to lbs then go to amazon and you will have them in 2 days plus they are dirt cheap 20.00 a pair....

Just a wild guess based on mine would be 150lb struts (667nm)

153stars · 06-11-2021, 10:23 PM

This is what I ordered near exact poundage from newtons list on old ones 95 Crown Royale. These are top notch OEM in autos good dampening.
I took good but weak ones and moved to hinged utility doors. The propane door seems to have a ton of friction like its made different. I never checked that one out.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Lowflyer1 · 06-12-2021, 06:34 AM

When I replaced some of mine, I believe they were 60 lbs each for the doors that have a strut on each side. The rear electrical bay only has one and is 100 lbs.

153stars · 06-12-2021, 05:04 PM

The pano doors are definitely 100lb or a bit over. The cylinders on mine were marked in Newton's "N" and mm. I did the math or Google did. I think the smaller regular doors were 65lb one or two used weak 100lb on each and I'm happy. No doors falling on my head. Save a bunch over rebranded ones the Suspa ones linked are top tier and have nice dampening ,other cylinders buyers complained about slamming at end of stroke. The hunt started with entrance door struts for another owner. Suspa lists specialty struts extra dampened but didn't pan out for short run or order.

NHRA225 · 06-12-2021, 06:00 PM

There Must be some Part numbers on those shocks ! Check them All !!
Mine are All 60 lbs ea --2 per door.

153stars · 06-12-2021, 10:27 PM

Here had in my phone gallery 410N is 92-93 lbs this one has 320/93 in measurements I guess 93 pounds. They are Stabilus /Lift-o-matic. The part # has changed over the years. I have replaced every one on pano doors besides propane door. The bed and rear hood are different double the power if I remember right could find those in gallery . The Suspa work great made USA and cheaper than most listed.

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garage man · 06-13-2021, 09:32 PM

Thanks chuck. I suspect you do not have the pantograpgh style doors. I can barely comress my week struts and they do not begin to hold the doors.
I will let you know what I finad.

Quote:

Originally Posted by NHRA225

There Must be some Part numbers on those shocks ! Check them All !!
Mine are All 60 lbs ea --2 per door.

garage man · 06-17-2021, 09:57 PM

I have 100 lb. struts that will be here Friday. Only one pair as a test. If they do not do the trick then i will try 150 lb.

garage man · 06-18-2021, 09:21 PM

Quote:

Originally Posted by 153stars

Here had in my phone gallery 410N is 92-93 lbs this one has 320/93 in measurements I guess 93 pounds. They are Stabilus /Lift-o-matic. The part # has changed over the years. I have replaced every one on pano doors besides propane door. The bed and rear hood are different double the power if I remember right could find those in gallery . The Suspa work great made USA and cheaper than most listed. Attachment 331924

Thank you 153stars.
I received my first 2 struts today, 20" and 100 lbs. They are installed and what a difference. They lift up so easily and when closed the struts actually hold the doors ion the down position and I doubt if they would come open if not locked.
I ordered the 12 more I need and they are from SUSPA and made in USA.
Thanks again.

garage man · 06-24-2021, 04:50 PM

The first 2 struts were from Red Hound Auto on Amazon and worked great. I then ordered 12 more of the 20" from Suspa. Sadly I didn't read the fine print. The 20" 100 lb Suspa actually are only 19.7 inches. That means the door when open is about 2 inches or more lower than it should be.

I returned the Suspa's and ordered more from Red Hound.
Size does matter.

153stars · 06-25-2021, 01:29 PM

Sorry if I shorted you ,did you try them and doors didn't open full. I measured ones I had and I don't remembering them being shorter or doors being different as I was swapping them .I did them one at a time as not to get pinched. I saved and swapped a bunch of old weak ones for the lighter regular hinged door struts one at a time as well.

Quote:

Originally Posted by garage man

The first 2 struts were from Red Hound Auto on Amazon and worked great. I then ordered 12 more of the 20" from Suspa. Sadly I didn't read the fine print. The 20" 100 lb Suspa actually are only 19.7 inches. That means the door when open is about 2 inches or more lower than it should be.

I returned the Suspa's and ordered more from Red Hound.
Size does matter.