Synchronization of the crankshaft and gearbox shaft of the fuel injection pump drive D-245.7E3 / D-245.9E3 of the PAZ 32053-07 bus

Purpose of the procedure: The installation of pulse wheels according to the proposed scheme is carried out to synchronize the signals from the crankshaft speed sensors and the input shaft of the injection pump drive and is ensured by binding the sensor signals to the common reference point of the shaft position at the moment the piston of the first cylinder passes the top dead center (TDC).

1. Remove the cylinder head cover.
2. Install the piston of the first cylinder to the TDC position, turning the crankshaft clockwise using bolt 4 (Fig. 2), until the axis of the 16th tooth of the "crown" of the impulse wheel (when counting counterclockwise from the gap segment at the "crown" of the impulse wheel) coincides with sensor axis 1.

Checking valve condition: Make sure that the intake and exhaust valves of cylinder 1 are closed. If the exhaust valve is open, turn the crankshaft a full turn and recheck the condition of the valves.

1. Turn the crankshaft clockwise using bolt 4 (Fig. 3) approximately two turns.
2. On the second turn, remove the lock from the threaded hole of the rear sheet, insert it with the reverse side into the same hole until it stops into the flywheel (for ZIL diesel engines, press the spring-loaded lock until it stops into the flywheel).
3. Turn the crankshaft until the lock coincides with the hole in the flywheel.

Adjusting the sensor position: If there is misalignment between the sensor and the sixth tooth, it is necessary to loosen the fastening of the sensor and ensure that the axes of the sensor and the tooth coincide, then secure the sensor.

Positioning the impulse pins:

1. With the gearbox removed, turn clockwise the drive coupling half 5 (Fig. 5) to achieve the position in the window for installing the sensor of two sequentially located pulse pins.
2. By slightly turning the drive in the opposite direction, position the locating pin (the first one in the direction of shaft rotation) in the center of the window.
3. Install a device into the window to fix the position of the locating pin 1 (Fig. 5) and secure the device with the mounting flange 2 and bolts 3.

1. Remove the hatch cover 1 (Fig. 6).
2. Supporting the drive gear 6 through the hatch window, insert the drive coupling half 5 into the grooves of the drive gear studs 3, thus installing the gearbox.
3. Attach the gearbox to the distribution panel.
4. Install and tighten nuts 2 to a torque of 35–50 N·m.

1. Remove the mounting flange and remove the mounting fixture.
2. Replace the mounting flange and secure it.
3. Install the hatch cover, speed sensor and secure them.
4. Remove the flywheel retainer and screw its threaded part into the rear sheet.
5. Install the cylinder head cover.

Note: After completing all operations, it is necessary to check the synchronization of the sensor signals and, if necessary, perform adaptation using diagnostic equipment.