Kohler RD 441, Service Manual

Page: 19 / 84

- 19 - Workshop Manual KD 441_cod. 1.5302.865_2 nd ed_ rev. 01.
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4
6
5
4
2
1
6
8
3
7
7
5
A
Disassembly
Hold the grip and firmly pull out the rope to start.
Rocker arm cover breather system
The crankcase breather system is located inside the rocker arm cover
1 . Check that diaphragm 2 is intact ; wash with Diesel oil and blow
through the small mesh element 4 with compressed air.
When reassembling fix box
3
with Loctite " Form-a- gasket No. 6"
and screw plate 5 .
To assemble decompression lever 7 , insert spring 6 (positioned as in
figure) on the lever pin, considering that the spring clip should be in
-
serted in hole 8 .
Rocker arm cover - Breather recirculation
Caution – Warning
Always check the the spring 3 and valve 2 to make sure they are
in a good conditions.
Crankcase vapor recirculation occurs through duct 4.
If the air filter clogs, the increased intake vacuum could suck oil throu
-
gh duct 4 into the combustion chamber, causing the engine to ope-
rate at a runaway rate. This is prevented by valcuum valve
2 which,
when the vacuum increases, overcomes the resistance of spring 3
and shuts the duct 4 .
Make sure that oil plug 5 is correctly closed.
Refit cover
1 and tighten rocker arm cover to 10 Nm.
Rocker arm cover
Loosen fastening screws A and remove the rocker arm cover.