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|Dunlop Air-Assist Suspension - Semi-Air - 5yr Warranty||
Quote of the moment: "no hesitation in using your company again & recommending to friends." PW
Semi-Air Suspension by Dunlop: One of the very best ways to fix a saggy bottomed motorhome! How do we know? I've driven a few and the one with air springs was the best of the lot. Also now that the once cheap extra coil springs are so much more expensive, airbags are the really obvious choice.
Sag disappears but so does the wallow and a lot of the roll, resulting in an altogether better drive with better stability on motorways and an overall better ride too.
The assistance is easily user adjustable via simple air pressure changes, even with side to side differences to compensate for some uneven loading - typical of layouts with offset fridges, water tanks, etc.
As a result of course suspension fatigue is pretty much halted as the air bellows take much of the strain. Shock absorbers may last longer too.
Ideal to improve - motorhome - motorcaravan - camper - campervan - 'dormobile' - however named!
All are designed for vehicles with Rear Leaf Springs do please get under and look before ordering.
Huge Range of 'Van' Applications: to suit the usual - and some unusual - motorhome base vehicles. As fitted to our own motorhome. If you have a specific vehicle interest not listed we'd be pleased to try to help - apart from motorcaravanning I once worked as a techie in a Firestone factory making airbags.
A-Class / Alko Chassis? Sorry no. Problems with Alko often lie in the suspension itself and adding airbags will not solve it but might even make it worse. Dunlop do offer Al-Ko systems but this is a professional, specialist supply & fit task not really DIY. All this often applies to A-class motorhomes and some C-class coachbuilt motorhomes so you may need to find out quite a bit about your chassis specification. If simply say standard Fiat then our kits will be fine, a key feature of 'standard' is a solid axle leaf spring rear suspension.
Why Dunlop and not say Air-Ride? We've nothing against Air-Ride™ or indeed Drive Rite™, and they've made a great job of bringing the technology to our rather ordinary van chassis rather than just to specialist trucks, trains, ambulances, buses, etc. Full or Semi-air suspension is even used on high end cars from Rolls Royce, Mercedes and Range-Rover but do note we're only talking Semi-Air here. i.e. air assisted suspension mostly sitting between the rear 'cart' springs and chassis where maximum stability can be achieved, often replacing 'bump stops' which also act as high load spring assisters on some vehicle chassis (some Ducato included).
So why Dunlop? Well just look at the Dunlop product features • Full 8" 200mm dia airbags/bellows - and size really matters in bellows giving better ride and more progressive suspension at quite modest air pressure, long life too • Anodised rather than painted metal components • Captive nut air connections for long life and reliability • Long warranty of 5 years • Great instructions and support. • Quality product, development and customer service from a quality European company at very reasonable prices plus 5 year warranty. • Zero returns/claims here. So as my offspring say - What's not to like?
Fitting or Kits? We don't offer fitting but do offer a range of kits for DIY fit or for workshops / mobile engineers to fit for you. The Rear Semi-Air Suspension Kits are the most popular. The price of the kits ranges from the basic version with two simple air inlet valves that you use to inflate the airbags to the desired pressure right up to deluxe versions with built-in heavy duty 12v compressors & gauges for push button operation from the cab. All offer the same height and ride improvement, it is just the inflation convenience that changes, the simplest and cheapest being just like topping up your tyres one at a time using the standard supplied twin Schrader Valves. The basic kit includes the fittings pictured right - airlines, twin valves and ties, The optional on-board Footwell Gauge Kit is pictured left - this "Gauge & Twin Valve Kit" is supplied with extra length airlines to reach the cab and this allows inflation, with readout, together or separately. The gauges are available in LH-Gauge, RH-Gauge, and Vertical-Gauge types, vehicles like Sprinter and Express often use a Vertical gauge fitted on a cupboard or seat box while in the Ducato-Boxer range the gauges are often situated in the drivers footwell and so use LH-Gauge for LHD and RH-Gauge for RHD - but only on the assumption it will be fitted in the drivers side footwell. The RHD version is pictured in the kit left while the LHD version is pictured lower right alongside the Vertical version, you can of course choose whatever orientation suits your desired location. Although not essential this gauge kit does add both convenience and consistency at a reasonable price so is highly recommended. NB: the airlines supplied with the airbag-kit-only are a different size to those supplied with airbag+gauges together - so it makes a lot of sense with less work and less cost to buy both together rather than piecemeal! A Compressor Kit may be needed to create a fully deluxe installation, this is far from cheap so it does add quite a bit to the overall price - but you do get lots of convenience, reassuring reliability, and easy & quick changes in pressure to change level or rear ride height whenever you want, boarding a ferry, loading the homecoming wine supply or just pitching up for example. These deluxe features, if required, are usually ordered as upgrades to basic kits. If planning such later upgrades remember to route the airlines to a suitable location at the outset and/or be prepared to invest in more airline when upgrading! If you have a good idea about the real detail of your future plans it may be a good idea to tell us about them before ordering so we can help to keep redundancy minimal. However, it is all fairly straightforward for the most popular kit only or kit + gauge & valves.
Why a gauge kit? Our expert says - "Some people manage without them, however if your dexterity is not very good you may wish to consider a basic gauge kit. When you fill a normal vehicle tyre with air, you always get a 'pssst' at the end, that small loss of air is nothing compared to the volume of air inside the tyre, however if you have the same loss of air when inflating the bellows on this air assisted suspension system, you can easily lose a lot or air volume out of the bellow, up to half maybe, so instead of having say 40psi, you end up with 20psi. Some users over inflate to allow for the loss of air, but it takes a while to get the knack of getting it right. Even using a tyre pressure gauge allows loss of air. With the simple gauge kit, there is no loss of air when checking pressures". But is it essential? No, just recommended especially with the basic footwell kit (pics further above) very affordable.
Your Vehicle: We/you will need to know a bit about your vehicle to
get the right kit.
main thing is the chassis. Importantly, is the chassis standard Fiat Ducato,
Peugeot Boxer, Mercedes Sprinter, Renault Master, Iveco Daily, whatever, or one of the the special AlKo rear chassis for motorhomes?
Is it the standard gross weight of 2.8t to 3.5t or a higher rating like the 'Maxi chassis'? Then
what is the model build year? - this is based on chassis build dates and not registration
dates which can lag far behind when motorhomes are involved! (our own
registered as new - 22 months after chassis build!). Model year changes can usually be identified visually - so if in
doubt about yours checkout these great Wikipedia links, each offers a wealth
of information and invaluable vehicle pictures for model/series
identification ... (further Google image searches can be useful too) ...
Also if a brake-height sensor (Load Sensing Valve or LSV) is fitted you may need to get under the vehicle to identify and/or possibly photograph the LSV type. This is then compared with the Dunlop info/instructions to get the right sensor version in the Dunlop kit. A typical schematic for 94-02 Ducato is shown above left and we offer LSV pictures of the two X230 types below. Apart from differences in the kits, the LSV is often adjusted on installation to maintain rear brake efficiency at the increased ride height when fully loaded. ABS brakes can also be an issue especially where a model range came both with and without ABS brakes. In some kits there are additional components supplied, in others none are needed, in some an adjustment is required, each is chosen to be correct for its particular vehicle type and specification. Sometimes the LSV is effectively disabled by the kit (correctly) but do not remove it - makes for an easier MOT.
If in doubt please don't guess but consult the Dunlop literature and if still unsure.
Originally marketed as AJV, these are far superior kits but apparently similar to others on the market!
Heavy Chassis? The normal single-axle heavy chassis of maybe 3.8t or 4.2t still takes the same airbag kit. These airbags are offering suspension assistance not replacing the suspension and will cope just fine.
Which LSV Type? - check under your 'van to see which you have and compare to any photos below!
Alko Torsion Suspension Kits? Sorry no. The problem with Alko is usually in the suspension itself and adding airbags will not solve it - may even make it worse. This is a professional, specialist task. This often applies to A-class motorhomes so you will need to find out quite a bit about your A-class chassis spec.
For Dunlop Auxiliary Air Systems Catalogue - as PDF 50pp & 5Mb in new window/frame - click here This shows the range of vehicles covered along with the system graphic for each.
Instructions for each system we offer will be uploaded here shortly but also at www.dunlopsystems.nl
Fiat Ducato Mk1 & Talbot Express 1984-1993 Build with Fiat / Talbot Rear Leaf Springs
Basic kit includes: Airbag assemblies x2, Airline tubing x2, Galvanised mounting hardware for Round section axle, Twin Schrader manual inflation point. LSV: Adjustment is required on installation. This is fairly straightforward, I did it myself many years ago when fitting spring assisters. Buy below >>
Ducato-Boxer-Relay-Jumper X230 1994-2002 Build with Fiat-Peugeot Rear Leaf Springs
Basic kit includes: Airbag assemblies x2, Airline tubing x2, Galvanised mounting hardware for square section axle 75x75, Twin Schrader manual inflation point. Two different LSV types as under.
Straight Rod & Coil Spring pictured below - Left
Ducato-Boxer-Relay-Jumper X244 2002-2006 Build with Fiat-Peugeot Rear Leaf Springs
Basic kit includes: Airbag assemblies x2, Airline tubing x2, Galvanised mounting hardware for square axle 75x75, Twin Schrader manual inflation point.
LSV: = Straight Rod & Coil Spring pictured above - Left
There are 2x versions for X244 - with one being for ABS brakes,
PS: do note the different headlamps to the X230 above, very important around 2002 and sometimes 2003
Ducato-Boxer-Relay-Jumper X250 ABS 2006-14 Build fitted with Fiat-Peugeot Rear Leaf Springs
The X250 chasss was released in late 2006 but many converted vehicles like motorhomes weren't sold until 2007 so there are 2007-reg vehicles on both older and newer chassis - use the picture right to identify the later type. The same mixed build & registration dates apply to the 2014 change, that latest model is pictured just below. The Basic Semi-Ait Kit includes: Airbag assemblies x2, Airline tubing x2, Galvanised mounting hardware for square section axle 75x75, Twin Schrader manual inflation point. The X250 model is fitted with ABS brakes. Buy below >>
Ducato-Boxer-Relay-Jumper X290 ABS 2014-Date Build with Fiat-Peugeot Rear Leaf Springs
The X290 / Euro-6 chassis is fundamentally similar to the X250 and takes the same kit. There are however minor differences in brackets and cables at the rear and these require small tweaks as part of the fitting procedure - download an instructions upgrade/supplement PDF by clicking here. The picture right shows a Fiat X290 van but the cab is the same for most motorhomes apart from the slight differences between the Fiat, Citroen & Peugeot styling around the radiator grill. As with the X250 the same basic kit includes: Airbag assemblies x2, Airline tubing x2, Galvanised mounting hardware for square section axle 75x75, Twin Schrader manual inflation point. This model is also fitted with ABS brakes. Buy Below >>
Mercedes 207/307/208/310 to-1994 Build with Mercedes Rear Leaf Springs
Kit no longer available from the major manufacturers but we can offer a locally assembled kit based on the Dunlop major parts. Our Basic kit includes: Airbag assemblies x2, Airline tubing x2, Mounting hardware for Round section axle, Twin Schrader manual inflation point. LSV: Adjustment required. Buy Below >>
Mercedes 208D/316CDI 1995-2006 Build with Mercedes Rear Leaf Springs
The First Generation or T1N, 95-06 with one facelift (pictured). Our basic
kit includes: Airbag assemblies x2, Airline tubing x2, Galvanised mounting
hardware for Round section axle, Twin Schrader manual inflation point.
Gauge sets are optional as ever.
NB: There are 2 versions for 208D/316CDI - with one for ABS brakes, which type is yours? Buy >>
Mercedes Sprinter 2006-on 200, 300, 400 & 500 series Rear Leaf Springs.
Also known as the Second Generation or NCV3 introduced in late 2006 and updated in late 2013 (Euro VI), there were styling changes to headlamps and radiator grille too but fairly subtle. All have ABS so no awkward airbag kit choices within the models. Our basic kit includes: Airbag assemblies x2, Airline tubing x2, Galvanised mounting hardware for Round section axle, Twin manual inflation point. Buy Below >>
Iveco Daily with Rear Leaf Springs Buy Below >>
Renault Master / Vauxhall Movano / Nissan Interstar NV400 Range - Four versions are offered for Master, one for the earlier 1998-2010 round axle model (some late registrations of course), and three for the 2010/2011-on models. Those three are - one for the square axle, one for the round axle RWD single wheel and one for the round axle RWD twin wheel model. There are subtly different kits for Movano with just two types covering the 1999-2010 & 2011-on, similar as for the Nissan Interstar too. Buy Below >>
Transit Range - tricky choosing, please see the info in the purchasing section below. Buy Below >>
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