Kohler KD 500 Manual de oficina - Página 36

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Engine assembly

- 36 -

Piston

Mount the rings on the piston (fig. 68) in the following order:

1. chromium plated compression retention ring (stamped

trademark pointing upwards)

2. tapering retention ring (stamped word TOP pointing upwards)

3. oil scraper ring (stamped trademark pointing upwards)

Position the piston so that the central axis of the combustion

chamber is aligned with the injector (fig. 69). Connect the piston

to the connecting rod, slightly pressing with the hand on the pin.

Cylinder

Insert the cylinder into the engine casing after having inserted

the 0.3 mm thick seal.

before mounting, turn the rings through 120°, one in relation to

the other, with the first compression ring pointing with its ends

on a level with the pin axis.

There is a chamfer to allow ring insertion on the lower side of

the cylinder. The operation is simplified by using a normal ring

mounting tool code 00365R0770 as indicated in fig. 70.

Move the piston to TDC (top dead center) and check that the

mark stamped on the flywheel corresponds to the reference

pointer of the tool code 00366R0240 (fig. 75).

To obtain the correct clearance, use a head seal of adequate

thickness:

1. check the piston projection as shown in fig. 71

2. Choose the seal as indicated in the following table

Measurement

0,00 ÷ 0,10

0,10 ÷ 0,20

0,20 ÷ 0,30

0,30 ÷ 0,40

NOTE: The distance between piston crown and the

corresponding head surface must be:

Head

Before fixing the head to the cylinder, fit the injector into its

housing and, after having temporarily fixed it, check that the

distance the nozzle projects from the surface of the head by (fig.

72):

regulate by placing copper washers between the injector and the

bearing surface on the head.

Consult page 19 and 20 for the relative inspections and

overhauls.

Workshop Manual KD500 _ cod. ED0053029390 - 1° ed_rev. 00

Dimensions mm

0,8

0,9

1,0

1,1

0,7 ÷ 0,8 mm

2,2 ÷ 2,7 mm