Dynapac DRP20, Operating Instructions Manual

Page: 93 / 112

8.10.3 Checking, cleaning the spark plug
NOTICE!
Danger of engine damage!
– Do not use spark plugs with incorrect heat
value.
Protective equipment: n Working clothes
n
Protective gloves
Special tool: n 13/16 inch spark plug spanner
1. Park the machine in secured condition
Ä
Chapter 6.4
„Parking the machine in secured condition“ on page 57 .
2. Allow the engine to cool down for at least 15 minutes.
3. Clean the area around the spark plug.
4. Unscrew the spark plug using a 13/16 inch spark plug
spanner.
5. Check the condition of the spark plug, clean if necessary.
6. In case of excessive combustion residues or burned off elec-
trodes, replace the spark plug Ä Chapter 8.8.1 „Replacing
the spark plug“ on page 76 .
7. Check the electrode gap of the spark plug with a feeler
gauge, if necessary, adjust the gap.
ð
Nominal value: 0.7 - 0.8 mm (0.028 - 0.032 in)
8. Carefully screw in the spark plug by hand.
9. Once the sealing surface of the used spark plug is in contact,
tighten for another 1/8 to 1/4 turn with the spark plug
spanner.
NOTICE!
Danger of engine damage caused by a loose
spark plug!
– Always screw the spark plug in correctly.
Fig. 102
Fig. 103
Maintenance – As required
DRP20 93