Maintenance - Section 4 08/07 OM4016 Page 4-20 Lubrication and Service PERIODIC REPLACEMENT OF COMPONENT PARTS FOR SAFETY DEVICES To ensure safety in operation, the user is requested to perform the periodic maintenance recommended in the previous schedules. In addition, special care should be paid to the periodic replacement of certain other parts which may affect safety in operation. The following parts should be considered for repair or replacement every 4000 hours , or every two years, whichever comes first: 1. Fuel Pump Screen Filter - Check and clean or replace screen filter. Fabrication of safety devices and other component parts have been designed to high standards.
How- ever, all parts are subject to wear and gradual fatigue during continuous use. Since it is difficult to deter- mine accurately the process of change in quality, wear, or fatigue, judgments must be made whether or not some parts should be replaced even if they do not show any faulty symptom at the time. Of course, any part found to have an abnormality should be repaired or replaced, regardless of the time it has been used. NOTE: This recommendation for the replacement of parts is to ensure safety in operation. The war- ranty guarantee to be free from manufacturing defects does not apply to the replacement of functioning parts for precautionary reasons. 2.
Periodic Replacement Safety Parts Kit - Use the periodic replacement safety parts service kit when replacing the parts. 3. High pressure hoses in steering circuit (to/from pump, demand valve, steering valve, steering cylinder).* 4. High pressure hoses in the hoist circuit (to/from pump, demand valve, hoist valve, hoist cylin- der).* 5. Outlet hose of retarder cooling oil pump.* 6. Outlet hose of steering oil pump.* 7. Outlet hose of transmission oil pump.* 8. Steering valve hose.* 9. Hose of fuel filter.* 10. Fuel hose.* The following parts should be considered for repair or replacement every 2000 hours , or every one year, whichever comes first:
*The replacement of these parts may be considered for Fire Prevention measures. 1. Brake valve parts. 2. Parking brake valve parts. 3. Relay valve parts. 4. Air governor parts. Other areas of the truck also require inspection and may require periodic replacement of parts due to environmental and operating conditions. Rubber or plastic parts which are subjected to extreme heat or ultraviolet (sunlight) conditions will deteriorate more rapidly than similar parts in less severe service. 5. Retarder control valve parts. 6. Emergency relay valve parts. 7. Emergency brake valve parts. 8. Quick release parts. 9. Parking brake chamber parts. Periodically check the following: 10.
Brake chamber parts (front and rear). 1. Air inlet piping elbows close to turbochargers and exhaust manifolds. 11. Engine Valve Clearance - Refer to the engine manual for the proper inspection, procedures, and tools. 2. Air cleaner plastic bonnets. 3. Door seals. 12. Brake Discs - Refer to Section "J", Brake Sys- tem, "Brake Circuit Checkout And Adjustment" , for proper inspection, procedures and tools. 4. Windshield wiper blades. 5. Windshield washer bottle. 6. Plastic covers and caps. 7. Water piping elbows and hoses. 8. Body cushion pads. 9. Plastic tubing for air lines.