Mack LEU, Operator'S Handbook Manual

Page: 38 / 59

34 MAINTENANCE AND LUBRICATION
Air Inlet System Ducts, Hoses and Clamps
Every 45 days or 150 hours, whichever occurs first, inspect all ducts and hoses for
signs of leakage or chafing. Replace hose and repair or replace ducts with holes.
Tighten clamps.
Chassis-Mounted Charge Air Cooling (CMCAC)
Vehicles equipped with CMCAC require the following preventive maintenance:
•
Daily — Remove all insects, leaves and other foreign debris from the frontal area
by using a firm bristle brush and soapy water.
CAUTION
Do not use a caustic solution to clean CMCAC.
•
Every 45 days of usage or 150 hours* — Check all air ducting and gasket
connections. Proper hose clamp torquing procedure is to tighten hose clamp nuts
until spring is fully compressed 3.9 to 4.5 N.m (35–40 lb-in).
•
Every 180 days of usage or 600 hours* — Check for cracks. Check the mounting
brackets for security and condition. Torque the mounts to 41 N.m (30 lb-ft). Check
core fins for external damage, debris or salt corrosion. Use a firm, bristled brush to
removed salt corrosion. Use air pressure to clean core blockage due to debris.
* Whichever occurs first.