FUEL SYSTEM
9
20
Filter – functional test
Pull off the rubber hose with the sintered
filter. Blow through the hose and note
whether the air can pass through slowly.
Filter replacement
A clogged filter should not be blown
clean but replaced. Use a punch to push
out the filter out of the hose.
Push in a new filter.
Filter – functional test
Pull off the rubber hose with
the sintered filter. Blow through
the hose and note whether the
air can pass through slowly.
Filter replacement
A clogged filter should not be
blown clean but replaced. Use a
punch to push out the filter.
Push in a new filter.
Non-return valve – functional test
Connect the non return valve to pressure
tester 501 56 27-01.
Note: Never expose the non return
valve to a high pressure (compressed air)!
Test the non return valve by first
blowing in the direction towards the
tank. The air should pass without a build
up of pressure.
Blow in the direction towards the filter.
The non return valve should stop a pres-
sure of approximately 3–6 psi/20–40 kPa.
At a higher pressure the non return valve
opens.
Non-return valve –
functional test
Connect the non return valve to
pressure tester 501 56 27-01.
Blow in the direction towards
the tank. The air should pass
without a build up of pressure.
Blow in the direction towards
the filter. Non return valve
should stop a pressure of
approximately 3–6 psi/20–40 kPa
and open at a higher pressure.
Press up the air vent unit with a pair of
pliers.
Press up the air vent unit with a
pair of pliers.
