Preparing and washing engine parts

Engine block must be flushed (fig. 1)

Preparation of components and parts for assembling the ZMZ-53 engine

Preparing to assemble the engine parts.

We press the front crankshaft oil seal into the front cover (Fig. 2).

Preparation of components and parts for assembling the ZMZ-53 enginePreparation of components and parts for assembling the ZMZ-53 engine

Outside, on the front cover there is an engine speed limiter (Fig. 3).

We remove all the insides from the speed limiter and put a solid gasket and attract with the body.

We screw the studs for mounting the fuel pump into the front cover

At the factory, the fuel pump is bolted on. We install studs (Fig. 4), which will eliminate unnecessary problems in subsequent operation.

Preparation of components and parts for assembling the ZMZ-53 engine

It happens that when a bolt is lost, a larger bolt is installed and this bolt rests against the camshaft gear, which leads to wear of the camshaft gear (Fig. 5)

Preparation of components and parts for assembling the ZMZ-53 engine

Preparing the crankshaft. If the shaft was bored, then we blow the channels after boring with compressed air

We twist the technological plugs of the oil channels (Fig. 6).

Preparation of components and parts for assembling the ZMZ-53 engine

We countersink the holes on the shaft with a ball from the bearing (so that there are no sharp edges on the working part of the shaft bearing (Figure 7)).

Preparation of components and parts for assembling the ZMZ-53 enginePreparation of components and parts for assembly of the ZMZ-53 engine

On the back of the crankshaft, an oil-fighting thread can be applied, in the place where the shaft is pressed against the packing (fig. 8). This increases the tightness of this joint.

Inspect and grind, if necessary, the camshaft (Figure 9)

Preparing components and parts for assembling the ZMZ-53 engine

If we remove the inside of the speed limiter, then we modify the bolt that secures the camshaft drive gear

Use a grinder to cut off the rolling of the flag and remove the flag and spring. Get bolt 2, as in the figure (Figure 10)

This is done so that the bolt flag does not rest against a solid gasket under the rev limiter housing.

Preparing components and parts for assembling the ZMZ-53 engine

In order not to make a mistake when assembling and installing gears, it must be taken into account that the mark on the crankshaft gear is on the 12th tooth, counting from the tooth opposite the slot for the key counterclockwise (Figure 11).

Preparing components and parts for assembling the ZMZ-53 engine

We press in the babbitt bushings of the camshaft (of course, steel-aluminum bushings can be used) (Figure 12)

Preparation of parts for assembling the ZMZ-53 engine

To press the bushings, we use a tool (Figure 13)

Preparation of parts for assembling the ZMZ-53 engine

new

After disassembling, thoroughly rinse all gearbox parts in kerosene, blow with compressed air and inspect

Possible pump malfunctions may include: leakage of the diaphragm and valves, decreased elasticity or breakage of the diaphragm spring, wear of pump drive parts