SENR9977 35 Testing and Adjusting Section i02253244 Fuel Injection Timing - Check 4. Remove all three timing pins and install the removed components. i02243111 Fuel Quality - Test Table 3 Use the following procedure to test for problems regarding fuel quality: 1. Set the number one piston at top center on the compression stroke. Refer to Testing and Adjusting, “Finding Top Center Position for No. 1 Piston” for the correct procedure. 1. Determine if water and/or contaminants are present in the fuel. Check the water separator (if equipped). If a water separator is not present, proceed to Step 2. Drain the water separator, if necessary.
A full fuel tank minimizes the potential for overnight condensation. Note: Do not remove the timing pins after finding top center on the compression stroke. Note: A water separator can appear to be full of fuel when the water separator is actually full of water. 2. Determine if contaminants are present in the fuel. Remove a sample of fuel from the bottom of the fuel tank. Visually inspect the fuel sample for contaminants. The color of the fuel is not necessarily an indication of fuel quality. However, fuel that is black, brown, and/or similar to sludge can be an indication of the growth of bacteria or oil contamination.
In cold temperatures, cloudy fuel indicates that the fuel may not be suitable for operating conditions. Refer to Operation and Maintenance Manual, “Refill Capacities and Recommendations” for more information. 3. If fuel quality is still suspected as a possible cause to problems regarding engine performance, disconnect the fuel inlet line, and temporarily operate the engine from a separate source of fuel that is known to be good. This will determine if the problem is caused by fuel quality. If fuel quality is determined to be the problem, drain the fuel system and replace the fuel filters. Engine performance can be affected by the following characteristics:
g01134728 Illustration 43 (1) Hole for timing pin for the fuel pump (2) Hole for camshaft pin (3) Hole for crankshaft pin 2. Insert the 27610032 Timing Pin through the hole in the fuel pump gear and through the slot in the hub. Push the timing pin fully into the hole in the body of the fuel injection pump. Cetane number of the fuel Note: The 27610032 Timing Pin must be a sliding fit in the hole in the body of the fuel injection pump. Air in the fuel Other fuel characteristics 3. The timing of the fuel pump is correct when all three of the timing pins are in the position. Note:
If the 27610032 Timing Pin cannot be pushed into the body of the fuel injection pump, then the fuel pump gear must be realigned on the hub on the fuel injection pump shaft. Refer to Testing and Adjusting, “Fuel Injection Timing - Adjust”. Required Tools Part Number Part Description Qty 27610032 Timing Pin 1