BobCat E35 – FUEL SYSTEM – Fuel Injection Pump – Timing

Timing the injection pump is done by changing the number of shims between the injection pump and engine block.

Turn the fuel supply lever to the ON position. Install a short plastic tube (Item 1) [Figure 60-70-16] in the fitting of the number one cylinder port. Point the tube up (vertical).

Turn the engine counterclockwise until fuel flows out of the injection pumps number 1 cylinder nozzle. (Install a tool on the crankshaft at the front of the engine to turn the engine.)

NOTE: The fuel must flow out of the nozzle for one firing cycle before timing can be attempted.

Pull the stop lever (Item 2) [Figure 60-70-16] 5,9 – 7,7 mm (0.232 – 0.302 in) from the free position toward the stop position.

Remove the rubber plug (Item 1) [Figure 60-70-17].

Continue to turn the engine slowly (for approximately one and three-quarter turns after fuel stops flowing from the injection pump nozzle), until the timing mark on the side of the flywheel (Item1) [Figure 60-70-18] is at the edge of the timing hole (Item 1) [Figure 60-70-19] in the flywheel housing.

The correct engine timing is 5.0° B.T.D.C. Add or subtract shims (Item 1) [Figure 60-70-20] to time the engine to 5.0° B.T.D.C. The engine is correctly timed when the correct mark on the flywheel is aligned with the notch in the timing hole.

NOTE: Shims (Item 1) are available in four thicknesses, shims with the two holes (Item 2) are 0,20 mm thick, shims with one hole (Item 3) are 0,25 mm thick, shims with no holes (Item 4) are 0,30 thick and shims with three holes (Item 5) [Figure 60-70-20] are 0,35 mm thick.

NOTE: Increasing the thickness of the shim pack by 0,050 mm retards the injection timing by 0.500×. Decreasing the shim pack by 0,050 mm advances the timing by 0,500.


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