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4-/5-Gas Measuring Instruments Unit AVL 4000

5-12 Service Manual

5.7 Cleaning the Condensate Part of the 4/5-Gas Bench

This part should be cleaned every six months or once a year, especially if the instrument

is often used to test non-catalytic-converter vehicles or 2-stroke engines. It should also be

cleaned if the condensate end of the pump starts to leak.

Accessories:

− Cleaning hose with filter

Length l = 0.5…1 m; diameter d

= 6 mm and hole diameter max. 1 mm

(the best way to clean it is by drawing through a 50/50 % mixture of air and

cleaning fluid)

− Connector

Hose fitting for connecting the condensate discharge hose and the probe hose

− Cleaning fluid

approx. 2…5 l (water with non-foaming detergent)

Procedure

• Switch the instrument off.

• Open the hose connection between the condensate filter and check valve.

• Connect the cleaning hose with filter straight to the check valve.

• Clean the probe hose and probe with clean, oil-free compressed air.

Caution: the probe hose must not be connected to the exhaust gas tester!

• Connect the probe hose and the probe to the condensate discharge hose (on the

pump) using a connecting piece

• Now set up a rinsing fluid circuit as shown:

Fig. 5-8

1..... Cleaning hose with aperture

2..... Filter

3..... Check valve

4..... Pump

5..... Connecting piece

6..... Probe hose

7..... Probe

8..... Cleaning fluid

9..... Condensate filter

10.....Condensate collector

Hole

AVL DiGas 4000 User Manual

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