2-4L41C, 2-4M41(Z), 4L42C, 4M42 Maintenance
HATZ
67Manual
Step Activity
1 Briefly let the engine run at maximum speed and watch for the
indicator (5) to light up for a short period – depending on the
version.
In the engines 4L42C and 4M42, the following flash code indi-
cates that maintenance work is required on the air filter
▪ 7 short flashes (approx. 0.5 seconds) and
▪ 1 long flash (approx. 1.5 seconds)
(see the chapter 8.2.11 Maintaining the dry air filter, page
79).
With mechanical air filter maintenance display:
1 Briefly let the engine run at maximum speed and watch for the
visible red field (1) in the mechanical air filter maintenance dis-
play.
The visible red field (1) indicates that maintenance work is re-
quired on the air filter (see the chapter 8.2.11 Maintaining the
dry air filter, page 79).
8.2.4 Checking the cooling air area
Safety notes
CAUTION
Danger of burns.
There is a danger of burns when working on a hot engine.
▪ Let the engine cool before maintenance.
CAUTION
Danger of injury.
When working with compressed air, foreign bodies may fly into
your eyes.
▪ Wear safety goggles.
▪ Never direct the compressed air jet toward people or toward
yourself.
CAUTION
Danger of engine damage from overheating.
The engine temperature display (option) lights up as soon as the
engine becomes impermissibly hot.
▪ Switch off the engine immediately and eliminate the cause.
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