The SMF® sintered metal filter and the systems based on it are exceptionally reliable in operation, low on maintenance and also benefit from a long service life. The pocket- type construction of the SMF® prevents clogging such as that familiar, for instance, from conventional ceramic filters with their honeycomb structure. This significantly increases the mileage before a filter requires cleaning, including in the case of older trucks. The upshot: depending on the engine type and operating profile of the vehicle, HJS filter systems only need to have stubborn residues cleaned out after covering a distance way in excess of 200,000 kilometres (120,000 miles).
Another advantage of the HJS filter is that operators are able to service and maintain them on their own premises without any difficulty. Neither is it necessary to send the systems back to HJS for cleaning, nor is there any need for complex cleaning equipment. This makes it possible to minimise the running costs for servicing and maintenance as well as the associated downtime costs.
In addition to combustible soot particles, filter systems also remove from the exhaust gases all other particulate matter that cannot be regenerated. For the most part, this is ash from burnt engine oil. These residues must be removed from the filter by cleaning.
See for yourself: this short servicing film shows you how simple it really is to clean an HJS SMF® system.
Experience has shown that an SMF® system offers three to four times more mileage than a conventional ceramic filter before it has to be cleaned for the first time. Thanks to this considerable servicing advantage, the two largest manufacturers of city buses, for example, already switched to fitting SMF® systems back in 2006. The filter systems can go far longer than 200,000 kilometres (120,000 miles) without having to be cleaned out.
Maintenance intervals depending on the driving pattern and oil consumption of the engine. Applies to HJS systems with uncoated filters (SMF®) and vehicles that are used in long-distance transport. (In adherence to the technical HJS specifications)
When a filter needs to be cleaned, this job can be done quickly and easily on the truck company's own premises or at the local garage as part of the usual servicing measures. Neither is it necessary to send the systems back to HJS, nor is there any need for complex cleaning equipment. The filter housing remains installed in the vehicle. All that is removed from the truck are the individual filter modules, which are then cleaned and freed of all residues with the aid of a commercially available high-pressure cleaner. Thanks to the simplicity of filter cleaning and the fact operators can do it themselves, both the running costs for servicing and maintenance and the associated downtime costs are kept to a minimum.