Installing the air filter cartridge
– Assemble all parts in succession, making sure
that they seat firmly and make a reliable seal.
Mechanical contamination indicator
After the air cleaner has been re-assembled, the
red zone „1“ visible in the maintenance indicator
must be cancelled by pressing reset knob „2“
(Figure 20).
5.4.3. Checking and adjusting
valve clearances
– On the encapsulated engine, take off the
capsule hood (see Chapter 2).
– Unscrew the hex nuts and take off the cylinder
head cover (Figure 4, Item 13).
– Take off the covers for the air guide housing
and belt guard (see Chapter 2).
– Insert a ratchet wrench or a 1/2" T-piece with
the necessary extension into square hole „1“
(Figure 33).
Important !
Turn the engine over in the normal direction of
rotation.
This is counter-clockwise in either case – at the
flywheel or timing gear end.
Adjusting method for two-cylinder engines
– The valves in cylinder 1 (at the fan end) must
be in the overlap position (exhaust valve not
yet closed, inlet valve just starting to open).
– Turn the crankshaft through 180 degrees in the
normal direction of rotation, and check valve
clearances at cylinder 2.
– Turn the crankshaft a further 180 degrees in
the same direction as before, and check the
valve clearances at cylinder 1.
Adjusting method for three- and four-cylin-
der engines (Fig. 34)
– Check valve clearances with a feeler gauge.
– Valve clearances (inlet and exhaust valves)
= 0.10 mm with engine cold.
– If valve clearance is incorrect, slacken off hex
nut „1“. Turn adjusting screw „2“ until feeler
gauge „3“ can just be pulled through between
the rocker and the valve stem, with slight
resistance to its movement, after nut „1“ has
been retightened (Figure 35).
Important !
Repeat the procedure for all valves, noting the
adjusting method described above.
– Attach the cover to the cylinder head again;
always use new sealing rings.
– Do not use the nuts securing the cover to the
cylinder head more than twice before renewing
them.
Tightening torque: 10 Nm.
– Run the engine briefly and check that the
cover is not leaking at the cylinder head.
Type
Check valves
at cyl. No.
Valve No. ...
fully open
1
3
3-cylinder
5
2
3
1
1
3
4-cylinder
5
4
7
2
3
1
21
Summary of Contents for 2 - 4 L 40
Page 1: ...INSTRUCTION BOOK 43340205 ENG 09 02 2 Printed in Germany 33 2 4L40 2 4L41 2 4M40 2 4M41...
Page 16: ...2 M 40 and 2 M 41 without oil pan 2 M 40 2 M 41 with oil pan 3 4 M 40 3 4 M 41 in all cases 15...
Page 32: ...10 11 L3 250 050 145 00 12 1 2 3 4 5 6 13 0 14 L3 1 2 1 3 0 15 3 2 START...
Page 33: ...16 L3 3 1 2 3 17 L3 2 18 19 1 2 L3 63 20 L3 48 1 21 1 L3 78 2...
Page 34: ...22 L3 53 1 23 2 1 L3 28 24 L3 105 25 L3 54 26 L3 79 1 2 27...
Page 35: ...28 1 2 3 4 L3 4 1 6 5 7 29 1 30 L3 60 31 L3 58 3 6 5 4 5 2 1 3 7 32 1 L3 50 33 1 1 L3 62...
Page 37: ...40 L3 68 41 2 1 3 L3 67 42 1 L3 70 43 L3 69 1...
