Section 110-0050 Engine - Air Cleaner 10. Install cover assembly (4) on air cleaner body (1) and secure with latches (5). (air cleaner outlet) increases. This vacuum is generally measured as 'restriction in mm (inches) of water'. The recommended maximum allowable intake restrictions at rated speed and load are as follows: Secondary Element Numbers in parentheses refer to Fig. 1. a. 380 mm-H 2 O (15 in-H 2 O) with clean filter elements. b. 635 mm-H 2 O (25 in-H 2 O) with dirty filter elements. Since safety element (3) is protected from contamination by primary element (2), it needs no periodic cleaning and should be replaced only after every third primary element (2) service.
While the air restriction gauge sends a signal to indicate the need for servicing, it does not give as precise a measurement as a water manometer or vacuum gauge. 1. With primary element (2) removed from air cleaner body (1), remove safety element (3). Water Manometer a. Remove protective cap (15) and disconnect harness at air restriction gauge (14). Remove air restriction gauge (14) from tee (16). 2. Remove any dust dislodged into air cleaner body (1) outlet and, using a damp cloth and a suitable solvent, wipe out all excess dust from air cleaner body (1) and allow to dry. b. Hold water manometer vertically and fill both legs approximately half full of water.
Connect one of the upper ends to tee (16) by means of a flexible hose. 3. Install new safety element (3) followed by primary element (2) in air cleaner body (1) 4. Install cover assembly (4) on air cleaner body (1) and secure with latches (5). c. With the manometer held vertically and the engine drawing maximum air, the difference in height of the water columns in the two legs is measured as the air cleaner restriction. Recommendations Numbers in parentheses refer to Fig. 3. d. If the restriction exceeds the levels indicated, engine performance will be affected. Primary filter element should be cleaned or replaced. 1.
Under no condition should the vehicle be operated without both filter elements in each air cleaner assembly. Vacuum Gauge a. Remove protective cap (15) and disconnect harness at air restriction gauge (14). Remove air restriction gauge (14) from tee (16). 2. It is very important that hump hoses (8 & 21), tube assembly (12), tube (20) and elbow (11) from the air cleaner assembly to the engine be airtight or the purpose of the air cleaner will be completely defeated. All clamps (9 & 10) should be checked frequently and tightened to prevent leaks. b. Connect the hose from the vacuum gauge to tee (16) and, with the engine drawing maximum air, take a note of the reading on the gauge. 3.
Keep new or cleaned filter elements on hand for replacement to prevent unnecessary downtime of the vehicle. c. If the restriction exceeds the levels indicated, engine performance will be affected. Primary filter element should be cleaned or replaced. MEASURING AIR RESTRICTION SERVICE TOOLS Numbers in parentheses refer to Fig. 3. Refer to Section 300-0070, SERVICE TOOLS for part numbers of service tools referenced in this section and general service tools required. These tools are available from your dealer. As a dry air cleaner element becomes loaded with dust, the vacuum on the engine side of the air cleaner * * * * 4 SM 1572 12-98