Damper and crankshaft pulley

All engines have a damper at the front end of the crankshaft. On fig. 42 shows the location of the parts. crankshaft sprocket (10) sleeve (6) mounted on the end of the crankshaft and secured with a key (8). They are bolted (4) with three cup washers (5). Damper (3) and crankshaft pulley (1) mounted on a bushing (6) in a certain position by shifting the location of one of the six holes for the mounting bolts. On the outer surface of the damper marks are applied corresponding to the position of TDC in individual cylinders. Designation "0", installed under the index pin corresponds to TDC in cylinders No. 1 or No. 6; designation "90" - in cylinders N5 and N3; designation "180" - in cylinders No. 4 and No. 2. On fig. 43 shows a damper. The arrow shows two designations. The crankshaft pulley is cast from gray cast iron or made from steel sheet, which must be taken into account when replacing the pulley.






When replacing the damper, balancing the crankshaft is not required.

When dismantling:

Remove fan shroud and fan.

Secure the crankshaft from turning.

To fix it, you can turn on the gear in the gearbox or the parking brake. You can remove the starter and fix the ring gear in the appropriate way.

Loosen the damper center screw.

Use a chisel to make marks on the pulley and sleeve to accurately fix the key.

Remove damper with pulley and bushing assembly. If necessary, use a hammer with plastic working surfaces. Take special care when removing the gray cast iron pulley.

Before installing the damper, assemble the crankshaft pulley and bushing and tighten the mounting bolts, paying attention to the position of the offset hole. Do not install spring washers.

Heat the bushing to 50°C to facilitate fitting on the crankshaft. Aligning the keyway and the position of the key according to the marks, put the bushing on the crankshaft.

Put dish-shaped washers on the mounting bolt, lubricate the thread, screw in the bolt and tighten to a torque of 270...330 Nm.

Install the fan and fan shroud.