WACKER Group DPU 25..H.., Operator'S Manual

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Operating instructions
T00980GB.fm
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6. Operating instructions
6.1 Diesel fuel
Only use pure diesel fuel.Close fuel tank immediately. It is important to
maintain absolute cleanliness to avoid otherwise inevitable trouble
with the fuel injection system, and to avert a premature clogging up of
the fuel filter. Do not open the fuel line nor the fuel pump or any other
point of the fuel system to avoid danger of dirt contamination, not
even for bleeding of air. The fuel pump will bleed automatically. This
applies even should the fuel tank have run dry by mistake. In such a
case simply refill fuel tank.
6.2 Dry-type air filter
A loss of engine power with a simultaneous belching of smoke
indicates a plugged-up air filter. Remove filter cartridge and clean by
light tapping to dislodge dust from the paper element.
Clean filter housing! Use a clean rag, do not clean with compressed
air. While cleaning avoid by all means introducing dirt into the engine
intake port.