Maintenance and care
30
Two-stage fuel filter
(replaced by parallel fuel filter)
In two filter housings connected in series
the fuel first passes through a felt tube el-
ement and then through a paper element.
1
2
4
3
5
1 Felt tube element (primary filter)
2 Paper element (secondary filter)
3 Vent plugs
4 Filler plug
5 Clamping screws
Replacement of filter elements
D Remove clamping bolts
D Take off filter bowls
D Take out filter elements
D Wash out filter bowls
D Install new filter cartridges
D Refit filter bowls using new gaskets
D Open vent plug for primary filter (felt
tube element). Fit new seals
D Operate manual fuel lift pump until fuel
is emitted without any bubbles
D Close vent plug on primary filter
D Bleed secondary filter in the same
manner
Parallel fuel filter with filter cartridges
(replaced by parallel filter with inter-
changeable filter)
The fuel passes through two filter el-
ements connected in parallel.
4
2
3
1
1
1 Filter elements
2 Vent plugs
3 Filler plug
4 Clamping screws
Replacement of filter elements
D Remove clamping bolts
D Take off filter bowls
D Take out filter elements
D Wash out filter bowls
D Install new filter cartridges
D Refit filter bowls using new gaskets
D Open vent plug (fit new seals)
D Operate manual fuel lift pump until fuel
is emitted without any bubbles
D Close vent plug
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