2.8.5. Piston replacement with a rod
If one of these two elements has to be replaced, it is necessary to replace all knots of the block (the piston, piston rings, a piston finger and a rod) new.
Collect directing bolt using the special KM-634-6 (1), KM-634-7 (2) and KM-634-5 (3) tools.
Establish the new piston in KM-634-1 (1) nest.
The opening of a piston finger should settle down horizontally.
Establish KM-634-4 (3) on KM-634-1.
Tighten bolts by hand.
Reliably fix the piston, using KM-634-2 (2) that it could not be displaced.
Define depth of a press fitting of a piston finger.
Press a hub (1) consisting of KM-634-6, KM-634-7 and KM-634-5 in an opening of a piston finger and a rod before achievement of KM-634-7 of the central situation in the piston.
In this situation KM-634-4 (2) should be opposite to edge of knot (arrow).
Tighten KM-634-4 bolts.
Remove KM-634-7 from a directing bolt and replace with the new (oiled) piston finger.
Heat up a new rod in the top part a heating plate.
Put the top head of a rod on a heating plate.
Reduce heat losses by means of a fire-resistant brick.
Installation temperature: from 280 °C to 320 °C
Repeated machining of a rod is impossible, because it has no balancing hairpins.
Observe the correct arrangement of the adaptation.
Inflow on a rod should be opposite to an arrow on the piston bottom.
Establish the piston bottom on the piston with a rod.
The got stuck piston cannot be pressed – carry out installation quickly.
Press the knot consisting of KM-634-6, a piston finger and KM-634-5 smoothly and without a delay through an opening of a piston finger and an emphasis rod in KM-634-4.
Disconnect KM-634-5 and KM-634-6 from the right and left parties of a piston finger.