Used DAF XF: 10 common issues
The DAF XF is, as we have said, a very sturdy and well-built tractor unit, so there have been very few major component failures reported. Nothing mechanical is completely faultless, however, so here’s a list of things operators have told us may crop up:
1. Hub seals
Larger fleets report a noticeably high number of instances where hub seals need replacing.
2. Brake discs
Replacing brake discs often requires the hub to be sent away to a specialist to have the seized mounting bolts drilled out. DAF sells a complete new disc and hub assembly on an exchange basis.
3. Rear axle modulator valve
Wiring for the rear axle modulator valve is prone to breaking down within its protective sleeving. Check for temporary repairs that have been left to become permanent.
4. NOx sensors
NOx sensors often need replacing. Check to see if this has already been done.
5. Heat shields
Reports of heat shields corroding. Check for evidence this is beginning to happen.
6. Gauge clusters
Some reports of gauge clusters in the dashboard cracking for no apparent reason.
7. Wheel wings
Examples of the wings behind the front wheels cracking, especially across the joints and at the bottom where they meet the spray-suppression flaps.
In theory, drivers should use the air dump before getting in and out of the seats, but many don’t. This can result in the outside edge of the seat squab giving way, especially if the driver is of a larger build. Check before buying, then educate to avoid recurrence.
9. APU valves
APU valves on the air system are prone to corrosion, probably due to their low-slung position. Avoid by paying particular attention to this area when washing the vehicle.
10. Air pressure
Vehicles prone to losing air pressure very quickly when parked up overnight. The problem is usually the exhaust brake solenoid, which is positioned alongside the engine and therefore prone to repeated expansion due to heat followed by contraction on cooling leading to a gap.
CM Show 2020: Hydrogen technology can decarbonise CVs today, says ULEMCo
ULEMCo will be on hand at this autumn’s Commercial Motor Show to share with operators how its hydrogen technology can take their vehicles beyond Euro-6 on the road to decarbonisation.
Recent results announced from HyTIME, a Low Emission Freight and Logistics Trial project partly funded by the Office for Low Emission Vehicles in partnership with Innovate UK, showed that more than 14 tonnes of CO2 was saved over a two-year period from 11 urban trucks and vans running on green hydrogen dual fuel.
This was based on displacing between 20% and 45% of the diesel fuel with hydrogen on the various vehicles, which if replicated across a whole fleet would lead to a "radical transformation of emissions", said ULEMCo.
Any Euro-6 diesel commercial vehicle can become hydrogen-enabled using ULEMCo’s H2iCED technology; this involves engineers making an assessment of the daily energy use of the vehicle in real-world use and determining the optimal packaging opportunity for on-board hydrogen storage (at 350bar), and then installing and commissioning the dual-fuel engine control technology that allows the hydrogen to mix with diesel directly in the engine.
A three-tier safety strategy is applied to ensure full safety standards in use, as well as a calibration process that ensures the vehicle performance matches that of the base vehicle.
If there is no hydrogen available for some reason, the vehicles will still operate as a standard diesel vehicle, giving operational reliability.
This approach, said ULEMCo, allows ultra-low emission mileage now, without any need to change operation, other than filling up with hydrogen as well as diesel.
The technology is most suited to urban, city and regional duty cycles where the vehicles return to base daily, and the scale of local demand will unlock the investment case for the infrastructure.
Commercial vehicles have now been trialled in a range of operations, such as a water tanker for Yorkshire Water, a road sweeper and domestic waste trucks for Aberdeen City Council, an RCV for operator Grundon and a regional haulage truck for Wykes Engineering; all applications that would lend themselves well to scaled back-to-base deployment.
If an operator has a fleet of around 30 vehicles based from one location, ULEMCo added that there are numerous investors in the UK that would work with the fleet operator to supply this fuel cost effectively.
Visit ULEMCo’s virtual stand at the Commercial Motor Show and find out how you can become part of the hydrogen transport revolution.
“Exhibiting for the first time at this year’s CM Show seemed like a no-brainer for us, given our priority objective is to create awareness in the commercial vehicle community that there are real options, available now, for them to decarbonise their fleets with our hydrogen dual-fuel technology,” said Amanda Lyne, MD, ULEMCo.
“We are really keen to see whether the virtual platform can enable us to broaden our contacts and message, and we are looking forward to discussing with fleet operators how we can help transform their fleets to meet climate change targets, without them having to compromise on operational performance.”
- The Commercial Motor Show is a brand-new, three-day event for the commercial road transport industry, featuring topical webinars, networking opportunities and an exciting online trade show. Book your free ticket today!