1. Close fuel shut-off valve at fuel tank.
DO NOT smoke or permit any open flame in area of H100C while you are servicing fuel
system. Be sure hose nozzle is grounded against filler tube during refueling to prevent
static electricity. Failure to follow this warning may result in injury or death to personnel or
damage to equipment.
DO NOT perform fuel system checks, inspections, or maintenance while smoking or near
fire, flames, or sparks. Fuel may ignite, causing damage to equipment and injury or death
Wear fuel-resistant gloves and eye protection when handling fuels. If exposed to fuel,
promptly wash exposed skin and change fuel-soaked clothing.
2. Rotate engine crankshaft clockwise until No. 1 cylinder is on compression stroke and position engine vibration
damper to 38 degrees Before Top Dead Center (BTDC) with last movement made in direction of engine
rotation. This will take up all slack in gear train.
3. Remove four of five capscrews (Figure 1, Item 3), and loosen fifth, securing injection pump timing cover
(Figure 1, Item 1) to crankcase front cover (Figure 1, Item 2) and rotate cover down as shown in Figure 1.
Figure 1. Injection Pump Timing Port.