Air Intake 09 09–01 Intake Piping Inspection Engine-Mounted Air Cleaner, 5700 Models 9 1. Ensure that the mounting fasteners for the air cleaner housing are tight. See Fig. 1 . 2. Check the tightness and condition of the clamp- ing hardware. The hose clamps should be tight- ened 40 lbf·in (4.5 N·m). 1 10 3. Ensure that the clamps are properly indexed. 4. Check the intake ducting for abrasions, cracks, and holes. Replace as needed. Frontwall-Mounted Air Cleaner, 4700 Models 9 3 1. Ensure that the fasteners for the air cleaner ele- ment and air cleaner housing are tight. See Fig. 2 . 7 8 2 2. Check the tightness and condition of the clamp- ing hardware.
The molded-duct-to-air-cleaner and molded-duct-to-elbow clamps should be tightened 40 lbf·in (4.5 N·m). The elbow-duct-to- turbo clamp should be tightened 90 lbf·in (10.2 N·m). 6 4 11/19/2014 f090512 5 1. Air Cleaner Housing 2. Air Cleaner Outlet Hose Clamp 3. Air Intake Duct 4. Air Intake Duct-to-Elbow Hose Clamp 5. Elbow 6. Elbow-to-Turbocharger Hose Clamp 7. Mounting Bolt 8. Mounting Bracket 9. Mounting Nut 3. Ensure that the molded-duct-to-air-cleaner clamp is properly indexed. 4. Check the intake ducting for abrasions, cracks, and holes. Replace as needed. Cowl-Mounted Air Cleaner 1. Check the connections between the plastic or aluminum piping and the rubber elbows. See Fig. 3 . Fig.
1, Engine-Mounted Air Cleaner and Ducting, 5700 Models 4. After disassembly of the plastic pipe from the rubber connection elbow, inspect the ends of the pipe for evidence of the rubber elbow rubbing on it. If chaffing marks are visible replace the worn pipe. Wipe any dust from the inside of the pipe. 2. Check the tightness and condition of the clamp- ing hardware. Clamps at rubber-to-plastic duct connections should be tightened 39 to 41 lbf·in (440 to 460 N·cm), and clamps at rubber-to- metal duct connections should be tightened 90 to 100 lbf·in (1015 to 1130 N·cm). 5. Check the inside of the rubber elbow for wear and contamination.
If the rubber elbow is reus- able, clean it internally with a shop towel, or soap and water. Blow-dry the elbow as needed, and install it. 3. Inspect the mating surfaces of the plastic or alu- minum pipes. If it appears that the rubber elbow has moved on the plastic pipe, or if the hose clamps were loose, disassemble for further in- spection. 6. Check the condition of the gear clamp. If wear is evident, replace the gear clamp with a constant- torque clamp. Constant-torque clamps should be Western Star Maintenance Manual, January 2015 09/1