Use a mechanical pressure gauge to measure the differential pressure across the system. If the pump is drawing high amperage (exceeding 8–10 Amps) while emitting a high-pitched scream, the internal bearings have failed due to oil starvation or prolonged exposure to contaminated fuel.
: The tank features a "Pump Tank Combination" (PTC) where the fuel pump is integrated into a multi-valve assembly. This pump circulates liquid LPG through the system and includes magnets to capture metal particles. TEC Control Unit lpi vialle technical manual top
: Siemens-branded injectors connected with black plastic pipes that meter fuel with high accuracy. Use a mechanical pressure gauge to measure the
Isolate the tank manual valve. Run the vehicle on LPG until it stalls to purge the lines. Slowly loosen the filter housing cap to vent remaining residual pressure. Replace the paper element and the viton O-rings. Ensure the new O-rings are lubricated with synthetic silicone grease. This pump circulates liquid LPG through the system