3-4L43C, 3-4M43, 3-4M43Z
Maintenance
HATZ
51
Manual
8.2.2
Maintenance plan
In new and generally overhauled engines, after
25 operating hours
:
▪ Change the engine oil
▪ Check the tappet clearance and adjust if necessary
▪ Check the screw connections (do not retighten the screws for attaching
the cylinder head)
In case of a low number of operating hours, change the engine oil no later
than every 12 months, regardless of the actual number of operating hours.
The degree of contamination of the fuel, the care with which refueling is per-
formed and the soiling on the inside of the fuel tank are decisive in determin-
ing the change interval of the fuel
pre
filter and the fuel filter.
Symbol
Maintenance in-
terval
Maintenance activity/Check
Chapter
Every 8–15 oper-
ating hours or ev-
ery day before
starting
Check the oil level.
7.8 Checking the oil
level and adding oil if
necessary, page 43
Check the intake area of the
combustion air.
8.2.3 Checking the in-
take area of the com-
bustion air, page 53
Check the cooling air area.
8.2.4 Checking the
cooling air area, page
54
Weekly
Check the water separator.
7.7 Checking the water
separator, page 42
250h
Every 250 operat-
ing hours
Change the engine oil
(3-4L43C).
8.2.5 Change the en-
gine oil., page 55
Check the poly v belt.
8.2.6 Checking the poly
v belt, page 57
Clean the cooling fan, cooling
fins and oil cooler.
8.2.7 Cleaning the cool-
ing fan, cooling fins and
oil cooler, page 58
Check the screw connections.
8.2.8 Checking the
screw connections,
page 62
Check the fuel
pre
filter for
contamination and change if
necessary.
8.2.9 Changing the fuel
prefilter, page 63
Reset the maintenance inter-
val indicator.
