GHG17 DD Medium Duty Operators Manual 5. Open the drain at the bottom of the fuel tank every 30,000 miles (50,000 kilometers) to drain off any water and/or sediment. WARNING: PERSONAL INJURY To avoid injury from improper use of chemicals, follow the chemical manufacturer's usage, handling, and disposal instructions. Observe all manufacturer's cautions. NOTICE: Never use galvanized steel fuel tanks, fittings, pipes, or supply lines. The fuel reacts chemically with the zinc coating to form powdery flakes that can quickly clog the fuel filters and damage the fuel pumps and injectors. 6. Every 120,000 miles (200,000 kilometers) or 12 months, tighten all fuel tank mountings and brackets.
At the same time, check the seal in the fuel tank cap, the breather hole in the cap, and the condition of the flexible fuel lines. Repair or replace the parts, as necessary. Inspection of Hoses and Fittings for Fuel Leaks A pre-start inspection of hoses and fuel lines is recommended. 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. WARNING: HOT OIL To avoid injury from hot oil, do not operate the engine with the rocker cover(s) removed. NOTE:
Leaks are not only detrimental to machine operation, but they can also result in added expense caused by the need to replace lost fluids Inspection of 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, sharp edges, or other obvious 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. All information subject to change without notice. 77 DDC-SVC-MAN-0192 Copyright © 2017 DETROIT DIESEL CORPORATION