MAINTENANCE 4.7 WHEN NECESSARY 4.7.1 ENGINE AIR CLEANER MAINTENANCE NOTICE Before servicing the filter elements clean dust cups of the pre-cleaners. Servicing the main filter elements, illust. Z 20716: Never service air cleaner while engine is running. Clean main filter elements as soon as the fault message "Air cleaner element restricted" is displayed on the ECS screen. Replace elements after 6 cleanings or annually, whichever occurs first. 1. Remove elements in sequence of reference numbers (1 to 4). 2. Clean and check respectively. replace main filter element. Wipe out filter housing with a clean cloth. 3. Element cleaning methods: Clean main element by one of the following methods.
Compressed air or washing: Compressed air is recommended when element will be re- used immediately because a washed element must be dried before re-use. Compressed air: Direct air through element in the direction opposite to normal air flow through the element. Move nozzle up and down while rotat- ing element. Keep nozzle at least one inch from pleated paper. Maximum air pressure to prevent damage of element is 100 P.S.I. (6 bar). Washing: 1. Soak element 15 minutes or more in cleaning solution. See package for full instructions. 2. Rinse until water is clear maximum water pressure 40 P.S.I. (2.5 bar). 3. Air-dry or use warm flowing air, max. 160° F (+70° C).
Do not use compressed air or light bulbs. REMARK Before installing main elements (4) check service indicator (6) of safety element (7). If a red signal is shown, replace safety ele- ment (7). Clean indicator (6) then suck on the outer side of the indicator to reset signal to green indication. 4. Install main filter elements (4). 305 CAUTION