Puch 1980-1981 Maintenance Manual page 39

CRANKSHAFT - WRIST PIN
cutting end
For centralizing and reaming use special tool 905.6.17.101.0
To enable accurate reaming place centralizing nut (1) over
little end, insert guide sleeve (2) in centralizing n u t
Insert tapered end of the reamer shaft (3) in guide sleeve
and centralize tool over bushing. Tighten guide sleeve to
centralizing nut.
?
Adjust cutting edges of reamer to bushing size, remove from
guide sleeve and tighten adjustment nuts on reamer. Apply-
ing oil to reamer, insert cutting end of reamer into guide
sleeve, start reaming procedure until correct wrist pin
bushing clearance is achieved.
Wrist pin and piston fit is matched together and coded as
follows:
Wear limit
yellow or blue dot inside piston .475 in.
2 or 3 dots on end of wrist pin 12.025 mm
Group
yellow
blue
SORTING TABLE
Wrist pin boss
Diameter
.4728 - .4727 in.
12.006 - 12.006 mm
.4727 - .4726 in.
12.006 - 12.003 mm
Wrist pin
Group
2
2
3
Diameter
.4726 - .4724 in.
12.003- 12.000 mm
.4726 - .4724 in.
12.003 - 12.000 mm
.4725 - .4723 in.
12.000- 11.997 mm
- 4 0 -