SERIES 60 ON-HIGHWAY ENGINE OPERATOR'S GUIDE Item 3 Fuel Lines, Flexible Hoses or other obviously hazardous areas. Since all machinery vibrates and moves to a certain extent, clamps and ties can fatigue with age. To ensure continued proper support, inspect fasteners frequently and tighten or replace them as necessary. If fittings have loosened or cracked or if hoses have ruptured or worn through, take corrective action immediately. A pre-start inspection of hoses and fuel lines is recommended. Leaks Make a visual check for fuel leaks at all engine-mounted fuel lines and connections, and at the fuel tank suction and return lines.
Since fuel tanks are susceptible to road hazards, leaks in this area may best be detected by checking for an accumulation of fuel under the tank. Hose Service Life A hose has a finite service life. With this in mind, all hoses should be thoroughly inspected at least every 500 operating hours (1,000 hours for fire-resistant fuel and lubricating oil hoses) and/or annually. Look for cover damage and/or indications of twisted, worn, crimped, brittle, cracked or leaking lines. Hoses with their outer cover worn through or with damaged metal reinforcements should be considered unfit for further service. FIRE To avoid injury from fire, contain and eliminate leaks of flammable fluids as they occur.
Failure to eliminate leaks could result in fire. Leaks are not only detrimental to machine operation, but they can also result in added expense caused by the need to replace lost fluids. All hoses in and out of machinery should be replaced during major overhaul and/or after a maximum of five (5) years of service. Hoses and Fittings Check hoses daily as part of the pre-start inspection. Examine hoses for leaks, and check all fittings, clamps and ties carefully. Make sure hoses are not resting on or touching shafts, couplings, heated surfaces including exhaust manifolds, any sharp edges, NOTE:
Fire-resistant fuel and lube oil hose assemblies do not require automatic replacement after five years of service or at major overhaul, but should be inspected carefully before being put back into service. All information subject to change without notice. 59 DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION