W 3500 L4-4.8L DSL Turbo (1999)
Fuel Filter: Description and Operation
DESCRIPTION
The purpose of the fuel filters is to clean the fuel of any dirt particles that can cause wear on the fuel injector's sliding surface; and to separate any water
from the fuel, which is ever-present from the condensation in the fuel tank. The pre-fuel filter (water separator) is located between the fuel tank and the
injection pump (figure 6). The secondary fuel filter is located between the fuel pump and the injection pump (figure 7).
Pre-Fuel Filter
When the condensed water in the pre-fuel filter (water separator) comes to the warning level indicated on its plastic body, drain the fluid immediately
from the drain plug located bottom of water separator
Fuel Filter
The fuel filter is spin-on cartridge-type. The filter should be replaced. Never try to clean it.
