Kohler RD 441, Руководство по обслуживанию

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- 38 - Workshop Manual KD 441_cod. 1.5302.865_2 nd ed_ rev. 01.
72
71
70
B
A
C
D
73
0.20÷0.35
0.30÷0.50
0.20÷0.50
1.00
1.00
1.00
5
A
B
C
0.11÷0.15
0.07÷0.11
0.03÷0.065
A
B
D
(B-D)
(B-D)
122.07÷122.13
23.04÷23.05
22.995÷23.000
0.04÷0.055
0.08
Piston rings Value
Stamped ko
Piston rings, distance between the tips (mm)
Fit the piston ring into the top part of the cylinder and measure the
distance between the tips.
1st piston ring
2nd piston ring
3rd piston ring, oil scraper
Piston rings, play between the slots (mm)
Replace the piston or piston rings if the value exceeds the maximum
limit.
Piston rings, assembly order
A = 1st Nitrided plated piston ring
B = 2nd piston ring (torsional)
C = 3rd Nitrided plated piston ring (oil scraper)
D = Chromium plated zone
Note: If a word (top, or some other word) is written on the surface of
a piston ring, mount that surface upwards.
Before inserting the piston into the cylinder, oil and turn the pi-
ston rings so that the cuts are staggered 120° to each other.
Connecting rod, piston pin
chromium plated
nitrided
chromium plated
Wear
limit
Overhauls and checking
clearance
wear limit