Multi-mesh DAF
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THE DAF FT 2800 DKSE tractive Fuller RTX 11609A gearbox.
It replaces the current Fuller RTO 9509A on all DKSE vehicles as from March 8, 1982. Both gearboxes are nine-speed constant mesh but the RTX 11609A gearbox was designed for a higher torque capacity: 1,560Nm (1,150Ibft) against 1,288Nm (950Ibft).
DAF says that the increased torque capacity has been achieved by multi-mesh gearing, which means that are always two or more gear teeth in contact at any time. Loads imposed upon the individual gear teeth are thus reduced. The multi-mesh gearing, it is claimed, also provides a smoother torque flow with reduced noise levels.
The gear change pattern on the FT 2800 DKSE is now a normal 'H' pattern. The gearbox ratios of the RTX 11609A are said to give similar road performance as the old unit, with an improvement in driveability. There is claimed to be significantly better gearing between the first and second ratios, too.
The RTX 11609A gearbox gives the DAF 2800 DKSE a maximum road speed at governed revs in top gear of 66mph, with a maximum gradient stop and restart of 1 in 3.7.