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07-09-2014, 09:15 PM
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#1
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Senior Member
Newmar Owners Club
Join Date: Aug 2013
Posts: 1,708
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Shocks - How to tell when?
I find it hard to tell if they are worn, the air suspension I think confuses the issue.
Hate to spend the $$ for no reason.
How can you test them for wear or worn out.
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Newmar Ventana 3933 | Miata close behind
1,060 Watts of Solar | 8 T-105 RE Batteries | Outback controls
HR 38 Endeavor
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07-09-2014, 09:24 PM
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#2
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Senior Member
Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 3,595
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I'm betting your shocks are hydraulic and not gas charged. So if no leakage then shock is still likely good. But if they are OEM there is likely a better shock available.
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KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
2013 Jeep Rubicon JK Unlimited
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07-09-2014, 09:35 PM
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#3
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Senior Member
Newmar Owners Club
Join Date: Aug 2013
Posts: 1,708
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No leaks, I see they are yellow not sure if OEM
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Newmar Ventana 3933 | Miata close behind
1,060 Watts of Solar | 8 T-105 RE Batteries | Outback controls
HR 38 Endeavor
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07-09-2014, 09:50 PM
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#4
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: May 2012
Location: Today? Clayton, North Carolina
Posts: 5,093
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Do you lose any fillings crossing bridges?
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John and Diane (RIP Lincoln, 21 FEB 22) RVM103 NHSO
Fulltimers since June, 2012
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element
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07-09-2014, 11:22 PM
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#5
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Senior Member
Newmar Owners Club Holiday Rambler Owners Club
Join Date: May 2014
Location: Aberdeen, SD
Posts: 586
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My shocks are starting to leak so their time has come . . .
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2000 Newmar Dutch Star 38' Class A, Spartan chasis, MM-2242, Cummins 330 pulling a 2014 Ford Focus.
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07-09-2014, 11:52 PM
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#6
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Community Moderator
Join Date: Sep 2011
Location: Between the Oceans
Posts: 8,034
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when your coach keeps bouncing more than 2 times on a bump, it means your shocks have no or little damping force, time to change. mine are yellow fsd's which are at the end of life. i ordered two adjustable koni's and just arrived. the labor cost for changing out is about $300. i am trying to figure out if i could raise front so i can diy. it seems like an easy job except raising the front up.
(does any one know what kind of jack can lift front up? a pair of jack stands are needed too).
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Steven & Polly
2000 Country Coach Intrigue 40' ISC 350
2018 Ford Explorer 4WD
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07-10-2014, 06:21 AM
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#7
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Senior Member
Newmar Owners Club
Join Date: Aug 2013
Posts: 1,708
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have you recently had you coach on Cat scale, take the rear weight get a jack to lift that and your safe.
same on jack stands, that way you're good front or rear
__________________
Newmar Ventana 3933 | Miata close behind
1,060 Watts of Solar | 8 T-105 RE Batteries | Outback controls
HR 38 Endeavor
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07-10-2014, 06:48 AM
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#8
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Senior Member
Join Date: Dec 2012
Location: Panama City, FL
Posts: 549
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Quote:
Originally Posted by jimbo2013
I find it hard to tell if they are worn, the air suspension I think confuses the issue.
Hate to spend the $$ for no reason.
How can you test them for wear or worn out.
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Too soft shocks will result in porpoising... bouncing up and down multiple time when you hit a bump or dip.
Too hard shocks will rattle your teeth every time you hit a bump and you feel every road imperfection.
Ours were rock hard when we changed them out.
Other than ride experience, you'll need to remove them to test. Might as well swap them at that point.
Quote:
Originally Posted by CountryFit
when your coach keeps bouncing more than 2 times on a bump, it means your shocks have no or little damping force, time to change. mine are yellow fsd's which are at the end of life. i ordered two adjustable koni's and just arrived. the labor cost for changing out is about $300. i am trying to figure out if i could raise front so i can diy. it seems like an easy job except raising the front up.
(does any one know what kind of jack can lift front up? a pair of jack stands are needed too).
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You don't need to jack up the front to change them. The shocks don't support the weight of the vehicle. That's the job of the air springs. It is wise to at least block it in case something gives way.
I did ours in the driveway without jacking. I put the levelling jacks down just enough to prevent it dropping in case the airbags gave out.
With gas shocks, you will need to compress them to install unless you leave the shipping bands in place. I used a floor jack to push the bottom end into place.
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Chris & Jo
2020 Forest River Sabre 38RDP.
2020 Chevrolet Silverado 3500HD Duramax Dually.
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07-10-2014, 08:02 AM
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#9
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Community Moderator
Join Date: Sep 2011
Location: Between the Oceans
Posts: 8,034
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Quote:
Originally Posted by chawkins99
Too soft shocks will result in porpoising... bouncing up and down multiple time when you hit a bump or dip.
Too hard shocks will rattle your teeth every time you hit a bump and you feel every road imperfection.
Ours were rock hard when we changed them out.
Other than ride experience, you'll need to remove them to test. Might as well swap them at that point.
You don't need to jack up the front to change them. The shocks don't support the weight of the vehicle. That's the job of the air springs. It is wise to at least block it in case something gives way.
I did ours in the driveway without jacking. I put the levelling jacks down just enough to prevent it dropping in case the airbags gave out.
With gas shocks, you will need to compress them to install unless you leave the shipping bands in place. I used a floor jack to push the bottom end into place.
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thanks chris! my front airbags are completely failed. it started last week the front-end came down completely and won't go up (that is another issue i need to resolve). it's so low that i am merely able to stick my head underneath it.
questions - are you using koni adjustable ones? if yes, per your experience, which setting to choose, the hardest or the second from the hardest? thank you!
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Steven & Polly
2000 Country Coach Intrigue 40' ISC 350
2018 Ford Explorer 4WD
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07-10-2014, 08:06 AM
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#10
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Senior Member
Join Date: Dec 2012
Location: Panama City, FL
Posts: 549
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I fitted Bilstein Comfort Shocks. Non-adjustable. Even so, made a HUGE difference to the ride.
You sure the airbag problem is not just the ride-height valve? Without airbags, I wouldn't even drive that down the driveway.
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Chris & Jo
2020 Forest River Sabre 38RDP.
2020 Chevrolet Silverado 3500HD Duramax Dually.
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07-10-2014, 08:16 AM
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#11
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Community Moderator
Join Date: Sep 2011
Location: Between the Oceans
Posts: 8,034
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Quote:
Originally Posted by chawkins99
I fitted Bilstein Comfort Shocks. Non-adjustable. Even so, made a HUGE difference to the ride.
You sure the airbag problem is not just the ride-height valve? Without airbags, I wouldn't even drive that down the driveway.
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because the front is too low, i couldn't go underneath to check it out. when i am working on shocks, i will take a look. the best scenario is the ride-height valve, the worst is the rupture of the airbags, which is made by neway about $200 apiece. adding labor on top of it.
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Steven & Polly
2000 Country Coach Intrigue 40' ISC 350
2018 Ford Explorer 4WD
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07-10-2014, 04:21 PM
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#12
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Senior Member
Newmar Owners Club
Join Date: Aug 2013
Posts: 1,708
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Spoke to one of the better tech support guys at Bilstein, with my mileage and no leaks the shocks are more than likely fine to about 100K.
Having said that 97-2002 (and some 2003's) used a softer shock as OEM and early replacements.
that softer shock will allow more lean and or wallow, in all since then 2002-2003 use a stiffer shock # 24-234498 in the front, if you look online this one is not spec'd for the earlier years, so if replaced with the softer version the results may not be better.
He said to leave the rears until 100K just change the fronts he expects there will be a big improvement.
ShockWarehouse $85 ea free ship.
I report back
__________________
Newmar Ventana 3933 | Miata close behind
1,060 Watts of Solar | 8 T-105 RE Batteries | Outback controls
HR 38 Endeavor
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07-10-2014, 06:50 PM
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#13
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Senior Member
Join Date: Sep 2012
Location: Tasmania now, USA/Canada/Alaska in April
Posts: 2,473
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Front is easy, just turn the wheel hard over to make it easier to get at. Can do it in a tuxedo and hardly get a wrinkle in it.
Back - usually doable if you are too lazy/stubborn to take the wheels off, but only if the nuts can be undone and the bolts aren't rusted up inside the sleeves.
As far as I know "gas" shocks merely refers to them being slightly pressurised with an inert gas to reduce the foaming of the oil inside. Couple of psi at the most otherwise you wouldn't be able to collapse them when fitting. Apart from that, it is oil forcing through valves that provide the "absorbing"
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Tony Lee - International Grey Nomad. Picasa Album - Travel Map
RVs. USA - Airstream Cutter; in Australia - MC8 40' DIY Coach conversion & OKA 4x4 MH; in Germany - Hobby Class C; in S America - F350 with 2500 10.6 Bigfoot camper
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07-10-2014, 07:32 PM
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#14
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Senior Member
Join Date: Dec 2012
Location: Panama City, FL
Posts: 549
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Quote:
Originally Posted by Tony Lee
Front is easy, just turn the wheel hard over to make it easier to get at. Can do it in a tuxedo and hardly get a wrinkle in it.
Back - usually doable if you are too lazy/stubborn to take the wheels off, but only if the nuts can be undone and the bolts aren't rusted up inside the sleeves.
As far as I know "gas" shocks merely refers to them being slightly pressurised with an inert gas to reduce the foaming of the oil inside. Couple of psi at the most otherwise you wouldn't be able to collapse them when fitting. Apart from that, it is oil forcing through valves that provide the "absorbing"
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Tony. My Bilsteins took around 100 lbs of force to compress them. I was able to compress them before installing but I just couldn't get the leverage to compress them and install the bolt while under the coach. That's why I resorted to the floor jack.
The Bilsteins came with a plastic tape wrapped end-to-end to keep them compressed. For those with an eye on both ends, the wrap could be left in place to aid installation. Mine had a stud at the top end so couldn't install them with the wrap in place.
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Chris & Jo
2020 Forest River Sabre 38RDP.
2020 Chevrolet Silverado 3500HD Duramax Dually.
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