3. Inspection and Adjustement 3.7 Fuel Injection Timing Inspection and Adjustment 1) Set the engine ready for starting. 1 in :in ijec- iing line.) (Complete air bleeding from the fuel 2) See that the fuel injection timing check and gear case are aligned. mark on the fuel pump mounting flange )nal m 3) Set the control valve at the operating position. 4) Disconnect the high pressure tube for the No.1 cylinder on the fuel pump side. Crankshaft pulley 5) Check fuel discharge from the delivery (Do not remove the delivery valve.) holder while turning the crankshaft (clockwise as seen from the radiator), and stop turning it when the fuel comes out.
Check the crankshaft pullet top mark position on the timing scale. The No.1 piston can be checked at its top dead center when the position is between 10’ before the. top (10 graduations on the left from 0) and 10’ after the top. 6) Fuel inject& pump mounting nut Fuel injection timing 7) Then wipe the outlet of the delivery holder clean. Turn the crankshaft in the opposite direction to return to approx. 20” before the top. Slowly turn the crankshaft clockwise. As the oil surface in the deliver holder rises, stop rota- tion upon rising and check the position on the timing scale.
The injection timing is normal if the top mark is positioned in the timing scale range shown in the table below on the left side from 0. 8) Standard: Degrees bTDC (FID) 10-12 4TNE94=98 4TNE106 4TNE106T 13-15 11-13 9) Repeat steps 6) to 8) a few times. (Note) Injection timing check for one cylinder is generally sufficient. If it is to be checked for all four cylinders, turn the crankshaft 180” each time and check in the order of cylinders No.1, No.3, No.4, No.2 and No.1. (The No.1 cylinder is positioned furthest from the radiator.) The cylinder to be checked is not limited to the No.1 cylinder but any desired one may be checked. 10) fuel pump toward or away from the engine for adjustment.
Rotate toward the engine to ad- vance the timing, and away from the engine to delay the timing. If the ignition timing is outside the standard, loosen the fuel pump mounting nut and rotate the (One graduation on the gear case scale corresponds to one degree in ignition timing.) 3-8