3-4L43C, 3-4M43, 3-4M43Z
Faults
HATZ
91
Manual
With automatic electrical switch-off mechanism (option)
Possible causes
Remedy
Chapter
Stop signal of monitoring elements for:
▪ Oil pressure too low.
Check the oil level.
7.8 Checking the
oil level and
adding oil if nec-
essary, page 43
▪ Engine temperature
too high.
Check the cooling air guides
for contamination or other im-
pairments.
8.2.7 Cleaning
the cooling fan,
cooling fins and
oil cooler, page
58
Irregularities in the electrical equipment:
▪ Loose contacts on
cable connections.
Check the electrical equipment
and its components, contacting
the service center if necessary.
3.2.4 Electrical
equipment, page
18
▪ Faulty three phase
alternator.
▪ Faulty relay.
The engine loses power and speed.
Possible causes
Remedy
Chapter
Dirty air filter unit.
Check the degree of dirt con-
tamination of the air filter, and
clean or renew it if necessary.
8.2.10 Maintain-
ing the dry air fil-
ter, page 65
Tappet clearance not
OK.
Adjust the tappet clearance.
8.2.12 Checking
and setting the
tappet clearance,
page 69
Injection nozzle not
OK.
Contact Hatz service.
Fault in the area of the
exhaust emission after-
treatment system.
Note the flashing signal and
eliminate the fault as shown in
the flash code table.
9.3 Flash code
table for faults on
the exhaust
emission after-
treatment sys-
tem, page 94
The fuel supply is impaired:
▪ The tank ran out of
fuel during operation.
Add fuel.
