American Motorhomes Ekf

10/10/2026

2009 Itasca Meridian 34 letar ny ägare.
Tre slideout varav det ena är sk full wall slide ger stora utrymmen i denna Husbil trots den måttliga längden 34 ft. Pålitliga Cummins 6,7L kopplad till Allison automat står för framdrivningen. Onan Elverk 8KW, Hyd.stödben, tvättmaskin/torktumlare, TV på utsidan är några av highlightsen. Plus ett väldigt rymligt badrum med duschkabin som överaskar. Mera information och bilder på vår hemsida.

07/10/2026

07/10/2026

CAT C9 Bigblock 450hk.
Diesel is the way to go.
🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸

06/10/2026

Higway Star⭐️⭐️⭐️
På väg till Dragracing Mantorp.

06/10/2026

2008 Rexhall när den kom till Sverige.
Såldes förra sommaren av oss till ny mycket nöjd kund. Endast 4 byggda sägs det. Detta ex säkert enda i hela Europa.


https://youtu.be/tsP4i2iUAZE?si=O_VbHM37CRzGQz_ehttps://youtu.be/tsP4i2iUAZE?si=O_VbHM37CRzGQz_e

Rexhall Aerbus 2010 Exterior

05/10/2026

En välbekant Entegra söker ny ägare!

För ett par år sedan sålde vi denna fina Entegra till dess nuvarande ägare. Nu är det dags för en ny ägare att ta vid och vi på American Motorhomes har fått uppdraget att förmedla försäljningen.

Den är utrustad med ett utekök, elektrisk markis, samt en stor TV för utomhusunderhållning.
Invändigt hittar du bland annat:
✅Rymlig köksdel
✅Dubbelsäng
✅Överhyttsbädd
✅Stor duschkabin
✅Toalett med fast tank
✅Stora förvaringsutrymmen
✅Stor micro-varmluftsugn
✅Gasolspis
✅4 dörrars kyl/frys med ismaskin
✅Matplats
✅Theater seats

Läs mer på https://americanmotorhomes.se

04/10/2026

Onan QD Dieselgenerators intressanta fakta.

The Cummins Onan Quiet Diesel (QD) series—specifically the 6000, 7500, and 8000 (6.0 kW, 7.5 kW, and 8.0 kW)—are the gold standard for high-end Motorhomes and Class A RVs.
​While RVers love them for running multiple ACs simultaneously, these specific diesel models have fascinating engineering choices, hidden mechanical shared parts, and unique quirks that most owners never learn until something breaks:
​1. The 6000, 7500, and 8000 kW Units Use the Exact Same Engine
​Most owners assume the 8000 has a physically larger, more powerful motor than the 6000. In reality, the QD 6000, QD 7500, and QD 8000 all share the identical 3-cylinder, liquid-cooled Kubota diesel engine (typically the Kubota D722).
​How they get the extra power: The output difference comes down to electronic programming, fuel mapping, and inverter sizing rather than a different engine block.
​The physical footprint: Because they share the same core, all three units weigh virtually the same (~420 lbs) and share identical outer dimensions.
​2. They Are Secretly Inverters (Not Traditional Fixed-RPM Generators)
​Unlike conventional RV generators that must lock their engine speed to a rigid 1800 or 3600 RPM to produce a steady 60 Hz AC frequency, the QD 6000/7500/8000 use a permanent magnet alternator and a digital inverter system.
​Variable Speed: The engine throttles up and down automatically based on power demand. At light loads (like keeping the lights or TV on), the engine revs down to conserve fuel and run whisper-quiet.
​Cleaner Power: Because power passes through an inverter stage, these produce cleaner, pure sine wave power than the utility grid, making them exceptionally safe for sensitive electronics and laptops.
​3. "Sucking" Air from Below (The Dust Trap)
​To maintain a tight, sound-deadened enclosure, Onan designed these quiet diesel models to draw intake cooling air directly from underneath the unit and exhaust it down low as well.
​The Unknown Risk: If you park your RV over dry grass, soft sand, or heavy dust and run the generator, it acts like a giant vacuum cleaner. Dust and debris get sucked into the lower shroud, clogging the internal radiator fins.
​The Overheating Trap: Once the buried radiator fills with dirt, the unit will repeatedly shut off due to high engine coolant temperatures. Cleaning the internal radiator on a QD model usually requires dropping the entire 420 lb unit from under the RV.
​4. Replacing the Water Pump Belt Requires Pulling the Whole Generator
​On a standard car or gas generator, replacing a fan or water pump belt takes 20 minutes. On the QD 6000/7500/8000 series, the water pump belt is tucked far in the back inside a fully sealed green box.
​The access panel on the side lets you change the oil, oil filter, fuel filter, and air filter easily.
​However, replacing the internal water pump belt or thermostat requires unbolting the exhaust, unhooking the heavy electrical connections, and sliding the entire unit out on a slide-tray or lowering it to the ground with a transmission jack.
​5. Glow Plug Pre-Heat Cycle is Automatic and Hidden
​If you press "Start" on a QD 6000/7500/8000 on a cold morning, there is often a long 5 to 15-second delay before you hear the starter motor turn over.
​New owners often assume the starter solenoid or battery is dead and repeatedly release and press the switch.
​In reality, the internal control board automatically activates the glow plugs based on ambient temperature sensors to pre-heat the combustion chambers before engaging the starter. Letting go of the button cancels the sequence.
​6. Fuel Economy Curve Diminishing Returns
​The fuel efficiency on these 3-cylinder Kubota-powered units is remarkable, but fuel consumption doesn't scale linearly across the models:
​No-load idle: All three burn roughly 0.13 to 0.21 gallons per hour.
​Half load:
​QD 6000 burns ~0.40 gal/hr
​QD 7500 burns ~0.56 gal/hr
​QD 8000 burns ~0.61 gal/hr
​Full load: The 8000 burns roughly 1.02 gal/hr, meaning running an 8000 flat-out for 24 hours consumes around 24 gallons of diesel from your main fuel tank.

04/10/2026

The story about Allison Transmissions.

While most people associate Allison with heavy-duty pickup trucks like the Chevy Silverado HD, several surprising facts highlight how expansive the company's engineering footprint really is:
​1. They Built Aircraft Engines First—Including for WWII Fighters
​Before making transmissions, James A. Allison founded the company in 1915 to build race cars for the Indianapolis Motor Speedway. During WWII, Allison shifted to aviation, building the famous Allison V-1710 V12 engine. It was the only U.S.-developed liquid-cooled engine to see action in the war, powering legendary aircraft like the P-38 Lightning, P-40 Warhawk, and early P-51 Mustangs.
​2. They Helped Put Astronauts on the Moon
​In 1969—the same year Apollo 11 landed on the moon—Allison wasn't just building truck hardware. They designed and manufactured the precision titanium propellant tanks for the Apollo Service Module, which held the fuel required to get the astronauts to lunar orbit and back home safely.
​3. They Don't Interrupt Engine Power When Shifting
​Standard automatics and dual-clutch transmissions briefly cut power to change gears. Allison’s commercial automatic transmissions use a feature called Continuous Power Technology™. By using a specialized torque converter combined with overlapping multi-clutch lockups, they deliver uninterrupted horsepower to the drive wheels during gear changes. This gives fire trucks, buses, and heavy haulers much faster acceleration under heavy loads.
​4. The Pickup Truck "Allison" Isn't Quite Built Like Their Commercial Ones
​The Allison 1000 transmission used in GM pickup trucks (like the Duramax Diesels) was designed via a joint venture between GM and Allison. While extremely durable compared to standard light-truck gearboxes, its internal design shares more architecture with passenger-vehicle automatic layouts than the massive planetary-gear systems found in military tanks, dump trucks, or city transit buses.
​5. They Built Transmissions for Main Battle Tanks
​Starting with the CD-850 during the post-WWII era, Allison became a dominant supplier for heavy military armored vehicles. They engineered cross-drive transmissions that handled both propulsion and steering for heavy military armor, including the M60 Patton and M1 Abrams tank families.

03/10/2026

Vad du antagligen inte visste om Cummins ISB 6,7L.

A few lesser-known facts and engineering details about the Cummins 6.7L ISB set it apart from typical truck engines:
​1. It powers military MRAPs and heavy armored vehicles
​Most people know the 6.7L ISB from Ram 2500/3500 pickups or school buses, but it's also a battle-tested military powerplant.
​It drives the BAE Systems RG-31 Nyala—a 17-ton, mine-resistant light armored vehicle used by the U.S. military and UN peacekeepers. Cummins modified the ECM and fuel management to allow the engine to burn JP-8 aviation jet fuel alongside standard ultra-low-sulfur diesel during field operations.
​2. The 2019 block redesign swapped cast iron for Compacted Graphite Iron (CGI)
​To handle the jump to 1,000 lb-ft of torque in 2019, Cummins redesigned the engine block from traditional gray cast iron to Compacted Graphite Iron (CGI).
​CGI is about 75% stronger and 45% stiffer than traditional iron, which allowed Cummins to thin out the cylinder wall casing. The result was a block that weighed 60 lbs less despite handling drastically higher peak cylinder pressures.
​3. The turbocharger doubles as a built-in engine brake and emission heater
​Unlike conventional fixed-geometry diesels, the Holset Variable Geometry Turbocharger (VGT) on the 6.7L ISB features a sliding nozzle ring.
​It performs three distinct jobs:
​Performance: Varies airflow to eliminate low-RPM turbo lag.
​Exhaust Braking: When descending grades, the nozzle closes down to build up backpressure against the pistons, acting as a dynamic engine brake.
​Thermal Management: On cold starts, it deliberately restricts exhaust flow to generate load, heating up the Diesel Particulate Filter (DPF) quickly to initiate passive emissions cleaning.
​4. It shares its foundation with a 4-cylinder engine
​Because the B-series architecture is modular, Cummins produces a 4.5-liter four-cylinder (ISB4.5). It uses the exact same bore, stroke, pistons, and valve dimensions as the 6.7L 6-cylinder, simply with two cylinders removed. You can find these 4-cylinder variants in European delivery trucks, city buses, and agricultural machinery.
​5. It holds 6 bolts per cylinder for head gasket retention
​While most light-to-medium-duty truck engines use 4 head bolts per cylinder, the 6.7L ISB uses 6 head bolts per cylinder. This heavy-duty structural layout was designed so the block and cylinder head could withstand extreme boost pressures without blowing the head gasket—a key reason the platform handles aggressive aftermarket tuning so well.

01/10/2026

Vad tycks om den interiören? 2027 Fleetwood Discovery 38L.