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Workshop Manual KD 441_cod. 1.5302.865_2
nd
ed_ rev. 01.
62
C
1
63
64
65
5
D 0.35÷0.65
1.5
Valve seat lapping
Aftercuttingvalveseats,lapvalveseatswithnelappingcompound.
wear limit
Valves - Oil seal in valve guide
To prevent seal 2 from being deformed when the valve guide is
mounted,titintotool1 p/n° 1460-047 after having thoroughly lubri-
cated it.
Firmly press to insert the oil seal in the seat on the valve guide to its
limit stop.
Valves - Reassembly
Components:
1 Valve stem
2 Oil seal
3 Spring washer/set
4 Spring
5 Cap
6 Half collets
Caution – Warning
To reassembly half collets place a suitable plate under the valve
head and press down rmly as indicated in the gure.
Check that the half collets are correctly attached to the valve.
Overhauls and checking
Valve seats - Reassembly
Caution – Warning
Thoroughly wash the cylinder head and the valve seats before
reassembly.
Place valve seat 1 onto its seat.
Place the driving tool for valve seat C on the valve seat.
Drive the seat in by hammering on tool C until the seat is inserted in
its housing to its limit stop.
Repeat these operations for valve seat 2 using the tool B.
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