Maintenance every month
BOMAG
42
BT 60/4, BT 65/4
6.10 Cleaning, checking the
spark plug, replacing if nec-
essary
Danger
!
Danger of burning!
Let the engine cool down for approx. 15 min-
utes before unscrewing the spark plug.
Caution
!
In case of excessive combustion residues or
burned off electrodes replace the spark plug.
Do not use spark plugs with incorrect heat val-
ue. An incorrect spark plug can cause damage
to the engine.
Recommended spark plugs:
NGK: CR5HSB
Denso: U16FSR-UB
Fig. 38
l
Pull off the spark plug socket (1) (Fig. 38).
l
Unscrew the spark plug using a 5/8 inch spark
plug spanner.
Fig. 39
l
Check the spark plug (Fig. 39) visually and
clean it if necessary.
l
Check the electrode gap with a feeler gauge, if
necessary adjust the gap to 0.6 - 0.7 mm
(0.024 - 0,028 in).
l
Turn the spark plug carefully in by hand.
l
Once the sealing surface of the new spark
plug is in contact tighten for another 1/2 turn
with the spark plug spanner.
l
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.
l
Press the spark plug socket back on.
541056
1
2
0,6 - 0,7 mm
0.024 - 0.028 in
541055
Go
to
Discount-Equipment.com
to
order
your
parts