Symbol Maintenance in-
terval
Maintenance activity/Check Chapter
If necessary, ev-
ery 3000 operat-
ing hours at the
latest
Replacing the poly v belts 8.2.8 Replacing
the poly v belts,
page 69
Every 4000 oper-
ating hours
Clean the entire EGR section
(EGR precooler, EGR valve,
EGR main cooler as well as
EGR mixing nozzle)
(To be carried out by a trained
specialist)
1)
Service according to service interval or after 2 years depending on which
criteria is first.
In new and generally overhauled engines, after 50 operating hours:
▪ Change the engine oil and oil filter. See the chapter 8.2.5 Changing the
engine oil and oil filter, page 59.
▪ Check the screw connections (do not retighten the screws for attaching
the cylinder head). See the chapter 8.2.10 Checking the screw connec-
tions, page 72.
8.2.2 Checking the intake area of the combustion air
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool.
▪ Wear safety gloves.
NOTICE
In case of heavy contamination, shorten the maintenance inter-
vals accordingly (see the chapter 8.2.1 Maintenance plan,
page 52).
Maintenance 4H50TIC
54 Operator's Manual
HATZ
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