Suspension and the great debate
TECHNOLOGY changes, but opinions hardly ever do when mixed with a touch of passion.
That point was proven when drivers debated their suspension preferences.
■ Jason V: Depends on application, I wouldn’t even entertain the thought of using an airbag suspension prime mover hitched to a platform trailer connected via draw bar. Goose neck wouldn’t be as harsh. Definitely 6rod any day.
■ Luke D: Had both on the T909 one on air other on 6rod pulling triple side tippers air bag out lasted 6rod by a country mile both trucks running over same haul road same amount of mileage per day best I can get is about 9 to 12 months out of 6 rod with out doing a major of bushes, yet I can get all most 24 months out of air bag. On that note all trucks from now on will be air bag I save a kings ransom in repairs and a spare air bag in the dog box costs little and 15 mins to change
■ Christopher B: Airbag vs spring, big implications with brake roller testing as is one of the major technical controversies that the industry is dealing with the NHVR over.
As a driver for ride, always loved a 6rod design and even a soft spot for walking beams but in today’s world of compliance the ability to weigh ‘on board’ digitally through the air suspension system is invaluable and mechanically its a lot easier and simpler to change an airbag than a spring pack that exceeds all WHS safe work limits for weight.
But each to the required application.
■ Alex N: Having worked in construction an seen numerous trucks working with us doing deliveries I can honestly say each job requires different set ups... to run leafs in construction pulling in and out of steep ramps an such can be done but trailers an tool boxes suffer... where as our fleet was all Volvos and had no dramas getting trailers in and out of steep grades.
■ Dale V: With heavy stuff air is fair standard anyway.
But in the towing game, no one should run spring but majority still do. In trucks that run empty majority of their life.
My Isuzu 600 has busted many a part from being violently thrown about the place on even major inner city roads at 50kmh.
Leafs need to go for MRs. They harsh as rock at best of time anyway, not to mention the rock hard cab mounts.
But I’m interested in the Airride IFS systems in Scanias and Volvos.
Tatra off road heavy trucks run full independent air systems with great success too.
■ Jake V: From my experience airbags are good for highway, leafs are better for goat tracks.
SPRING: This veteran Leyland steel spring suspension is similar in design to the old Mack Camel back.