SECllON N Air Cleaners and Fuel System AIR CLEANERS 2 3 4 5 6 Operating conditions play an important part in de- ciding how frequently it is necessary to service the air cleaner. If you are working in dusty conditions then the air cleaner should be attended to every day. as indicated under "Preventive Maintenance". If not already fitted, you should consider the fitting of an 18 in water gauge RESTRICTION INDICATOR in the air trunking between the air cleaner and the engine induction manifold. It indicates by means of a visual signal when the air cleaner element needs servicing. A means of visual signalling for the "Rotopamic" type air cleaner failure is the use of the "DUST SIGHT".
A window in this device becomes cloudy when the system has failed', but this type of indicator is usually only used with the two stage extreme heavy duty cleaners. N1 '1. Body Assembly 2. Element Assembly 3. Nut and Gasket Assembly 4. Clamp Assembly 5. Baffle Skirt 6. Cup Assembly The type of air cleaner fitted to your vehicle or machine depends upon the manufacturer of your equip- ment. Usually, guidance for the method of servicing is shown on the b'ody of the air cleaner. but the following advice will also help. Inspect the element by placing a bright light in its centre. Any pin holes, thin spots or ruptures render the element unfit for further use.
This cleaning procedure reduces the effective life of the element. Dry Type Two Stage "Cyclopac" See Fig. N.1 The dust bowl collects the heavier particles which are thrown out by the centrifuge path of the air. This dust enters the bowl by the slot in the baffle plate. The level of dust in the bowl must not be allowed to reach to within half an inch of the slot in the baffle plate. With all dry type elements, they should be renewed after six cleanings and at least once a year, which- ever occurs first. Never use petrol (gasoline) for cleaning. For cleaning purposes the assembly should be re- moved from the engine. With horizontal installations the slot in the baffle is located at the top.
Remove the dust bowl by releasing the pinch screwed clamp. Remove the baffle from the interior of the dust cup by lifting it out, which gives access to the dust for removal. The element can be removed by releasing the wing nut. Dry Type Two Stage "Cyclone" See Fig. N.2 The AUTOMATIC DUST EJECTOR should always be kept clean and the lips of the rubber ejector checked to see that they close but do not adhere together. Renew the element or clean by back flow air pres- sure no more than 100 Ibflin 2 or washing in a non foaming detergent as recommended by the air cleaner manufacturers. Allow the element to soak for at least ten minutes and then gently agitate.
Rinse the element with clean water and allow to dry. Do not use oven heat. To service the element, unscrew the clamping screw and remove the element retaining strip. Remove the seal plate (if fitted) and element. If the element is contaminated by dry dust, clean by carefully tapping by hand or by directing low pres- sure compressed air on to the clean side of the ele- ment. If the element is contaminated by oil or soot, it can be cleaned by washing in a suitable non-foaming detergent. After washing, rinse out thoroughly by directing clean water to clean air side of element and allow to dry - do not oven dry. WARNING:
There is a danger that some of the dust remaining in the element after it is washed will be pulled through into the engine if the element is re- placed in a wet condition. The reason for this is that the water acts as carrier for the dust.