Hatz Diesel 1D41., 1D90, 1D50., 1D81. Instruction Book

INSTRUCTION BOOK

433 216 08-USA-EPA IV-CARB

10.07-0.1

Printed in Germany

1D 41.
1D 50.

1D 81.
1D 90.

33

INCLUDES SUPPLEMENTAL INFORMATION TO THE
OWNER’S MANUAL FOR 2008 AND LATER EPA CERTIFIED
NONROAD COMPRESSION-IGNITION ENGINES

INCLUDES SUPPLEMENTAL INFORMATION TO THE
OWNER’S MANUAL FOR 2008 AND LATER CALIFORNIA
REGULATIONS FOR HEAVY-DUTY OFF-ROAD ENGINES

1

A new HATZ diesel engine is ready to work for you

This engine is intended only for the purpose determined and tested by the manufacturer of the
equipment in which it is installed. Using it in any other manner contravenes the intended purpose.
For danger and damage due to this, Motorenfabrik HATZ assumes no liability. The risk is with the
user only. Use of this engine in the intended manner presupposes compliance with the maintenance
and repair instructions laid down for it. Noncompliance leads to engine breakdown.

Please study this Instruction Book before you start the engine for the first time: it will help you to
avoid accidents, to operate the engine correctly, to perform maintenance work and to keep the engine
operating at full efficiency for a very long time.

Please follow all maintenance references carefully including the schedule for 2008 and later
EPA certified nonroad compression-ignition engines and for 2008 and later CARB certified
Heavy-Duty off-road engines to prevent our environment.

Please pass this Instruction Manual on to the next user or to the following engine owner.

Throughout the world, a network of HATZ service stations is at your disposal for advice, spare parts
supply and maintenance or repair work.
Please refer to the enclosed list for the address of your nearest HATZ service point.

Please use only genuine HATZ spare parts. Only these parts guarantee a perfect dimensional stability
and quality. Their order numbers are shown in the enclosed Parts List. Please note the complete
spare part kits in Table M00 of the list.

In the interests of technical progress we reserve the right to introduce modifications.

MOTORENFABRIK HATZ GMBH & CO KG

Page

1. Important notes on safe operation
of the engine 3

2. Description of the engine 5

3. General information 7

3.1. Technical data 7

3.2. Transport 8

3.3 Instructions for installation 8

3.4. Load on engine 8

3.5. EPA/CARB-type plates 8

3.6. Emission-related installation
instructions 9

4. Operation 10

4.1. Before initial start-up 10

4.1.1. Engine oil 10

4.1.2. Oilbath air cleaner 10

4.1.3. Fuel 11

4.1.4. Mechanical oil pressure monitor 12

4.2. Starting the engine 13

4.2.1. Preparations for starting 13

4.2.2. Starting with the handle 14

4.2.3. Starting with the handle with
kick-back damping 15

4.2.4. Starting in cold weather 16

4.2.5. Electric starter 16

4.3. Stopping the engine 18

5. Maintenance 19

5.1. Maintenace summary 19

5.2. Maintenance every 8 – 15 hours
of operation 21

5.2.1. Check engine oil level 21

5.2.2. Check air intake point 21

5.2.3. Air cleaner blockage indicator 21

5.2.4. Checking cooling air zone 22

5.2.5. Checking the water trap 22

Page

5.3. Maintenance every 250 hours

of operation 23

5.3.1. Oilbath air cleaner maintenance 23

5.3.2. Changing engine oil, renewing
oil filter 24

5.3.3. Checking and adjusting
valve clearances 25

5.3.4. Clean the cooling air system 26

5.3.5. Checking threaded connections 26

5.3.6. Cleaning mesh insert in exhaust
silencer 26

5.4. Maintenance every 500 hours
of operation 27

5.4.1. Renewing fuel filter 27

5.4.2. Dry-type air cleaner maintenance 28

6. Malfunctions – Causes – Remedies 30

7. Work on the electrical system 34

8. Protective treatment 34

SUPPLEMENTAL INFORMATION TO
THE OWNER’S MANUAL FOR 2008
AND LATER EPA CERTIFIED
NONROAD COMPRESSION IGNITION
ENGINES 35

SUPPLEMENTAL INFORMATION TO
THE OWNER’S MANUAL FOR 2008
AND LATER CALIFORNIA
REGULATIONS FOR HEAVY-DUTY
OFF-ROAD ENGINES 51

2

This symbol draws attention to important safety precautions.
Please comply with them most carefully in order to avoid any risk of injury to persons or
damage to materials.
General legal requirements or safety regulations issued by the competent authorities or
industrial accident insurers are also applicable.

Contents

3

1. Important notes on safe operation of the engine

HATZ diesel engines are economical, strongly built and long-lasting. They are therefore frequently
chosen for commercially and industrially operated equipment and machinery.
Since the engine forms part of the finished equipment or machine, its manufacturer will take all the
applicable safety regulations into account.
Nevertheless, we give below certain additional comments on operating safety, and would recommend
you to note them carefully.
Depending on the manner in which the engine is installed and its intended application, the equipment
manufacturer or operator may have to attach additional safety devices and prohibit potentially hazard­ous aspects of operation, for example:

– Parts of the exhaust system as well as the surface of the engine are of course hot during operation

of the engine, but also when it is still cooling down after use, and must not be touched.

– Faulty wiring or incorrect operation of electrical equipment may lead to sparks forming, and must

be avoided as a potential fire hazard.

– Rotating parts must be shielded against accidental contact when the engine is installed in other

equipment or machinery.
Guards are available from HATZ to protect belt drives, cooling fans and generators.

– Before attempting to start the engine it is essential to have studied the starting information in the

Instruction Book; this is particularly important on engines started with a starting handle.

– Mechanical starting devices must not be used by children or persons of insufficient physical

strength.

– In order to benefit from the advantages of the starting handle with kick-back damping, it must be

used precisely as recommended in this Instruction Book.

– Before starting the engine, ensure that all the specified protective guards are in place.

– The engine must only be operated, serviced or repaired by persons who have received the appro-

priate training.

– Keep the starting handle and the key out of reach of unauthorized persons.

– Never run the engine in closed or badly ventilated rooms.

Do not breath in emissions - danger of poisoning!

– Also fuel and lubricants could contain poisonous components. Please follow the instructions of the

mineral oil producer.

4

Important notes on safe operation of the engine

– Stop the engine before performing any maintenance, cleaning- and repair work.

– Stop the engine before refuelling.

Never add fuel near a naked flame or a source of sparks.
Don’t smoke. Don’t spill fuel.

– Keep explosive materials as well as flammable materials away from the engine because the exhaust

gets very hot during operation.

– Wear close-fitting clothing when working on a running engine.

Please don’t wear necklaces, bracelets or any other things which you could get caught with.

– Please pay attention to all advice- and warning stickers placed on the engine and keep them in legi-

ble condition. Contact your next HATZ service station, if a sticker comes off or is illegible and ask
for a new one.

– Note that any unauthorized modification to the engine absolves its manufacturer from liability for

the consequences.

Regular servicing in accordance with the details provided in this Instruction Book is essential to keep
the operating reliably and to ensure the exhaust quality of the engine.

In case of doubt, always consult your nearest HATZ service station before starting the engine.

5

2. Description of engine

1D41 • 1D50 • 1D81 • 1D90 S / Z engines

1

2391 / 12 2391 / 7

1 Cooling air inlet
2 Dry-type air cleaner
3 Decompression lever
4 Stop lever
5 Cooling air outlet
6 Silencer (muffler)
7 Guide sleeve for starting handle
8 Cylinder head cover
9 Cold-start oil metering device

10 Suspension lug

11 Tank filler cap
12 Oil drain plug, governor housing
13 Oil drain plug, governor side
14 Speed control lever
15 Oil filler pipe and dipstick
16 Fuel filter
17 Oil filter
18 Type plate
19 Tank drain plug
20 Combustion air intake

6

Description of engine

Fully-encapsulated version

1D41C • 1D81C engines

2

1 Capsule
2 Decompression lever
3 Cold-start oil metering device
4 Combustion and cooling air intake
5 Oil filter
6 Cleaning hatch
7 Side panels
8 Hold for starting handle
9 Suspension lug

10 Silencer (muffler), encapsul.
11 Cooling air outlet
12 Battery connection and central plug

for electrical system
13 Stop lever
14 Speed control lever
15 Oil drain plug
16 Oil filler and dipstick
17 Type plate

2392 / 1 2392 / 4

7

3. General information

3.1. Technical data

Type 1D41. 1D50. 1D81. 1D90.

Engine models S, Z, C S, Z S, Z, C S, Z

Mode of operation air-cooled four-stroke diesel engine

Combustion method Direct-fuel injection

Number of cylinders 1 1 1 1

Bore / stroke mm 90 / 65 97 / 70 100 / 85 104 / 85

Displacement cm³ 413 517 667 722

Engine oil content without filter approx. L 1.1

1)

1.4

1)

1.8

1)

1.8

1)

with filter approx. L 1.2

1)

1.5

1)

1.9

1)

1.9

1)

Volume of oil between
„max“ and „min“ marks approx. L 0.4

1)

0.5

1)

0.9

1)

0.9

1)

Consumption of lubrication oil
after running-in period approx. 1 % of fuel consumption at full load

Engine oil pressure
Oil termperature 100 ± 20 °C min. 0.6 bar at 850 r.p.m.

Direction of rotation
looking at the flywheel counterclockwise

Valve clearance at 10 - 30 °C
Inlet mm 0.20 0.10 0.10 0.30
Exhaust mm 0.20 0.20 0.20 0.30

Max. angle from vertical in any
direction (continuous operation) max. 30°

2)

30°

2)

30°

2)

30°

2)

Weight (incl. fuel tank, air-cleaner,

exhaust silencer and electric starter)

Engine model S approx. kg 75 76 89 90
Engine model Z approx. kg 77 78 91 92
Engine model C approx. kg 96.5 – 121

Model S: non-encapsulated, normal system of balancing

Z: non-encapsulated, add. system of balancing
C: SILENT PACK, add. system of balancing

1)

These data are approx.-values. The max. mark on oil dipstick counts.

2)

Exceeding these limits causes engine breakdown.

3.2. Transport

A lug is provided on top of the engine

as standard equipment, so that the en­gine and its auxiliaries can be lifted safely. It
is not suitable for lifting complete machines or
similar with the engine attached, and this is
strictly prohibited. (See Chapter 2.)

3.3. Instructions for installation

The „Manual for Selection and Installation of En­gines“ contains all the information you need if
your engine has not yet been installed on or in
the equipment it is intended to drive, or set up
in its correct operating position. You can obtain
a copy of this manual from your nearest HATZ
service station.

3

The permitted loads and elements on

the speed adjusting lever and the stop
lever should be observed as an exess can lead
to damage to the contacts and inner governor
parts.

3.4. Load on engine

See supplemental information for EPA certified
engines, Page 35; resp. supplemental informa­tion for California regulations for off road
engines, Page 51.

3.5. EPA/CARB-type plates and
fuel label

There are two EPA/CARB- type plates applied for
the identification of the engine. The type plates
are placed on the crankcase resp. on the capsule
(chapt. 2).
They include the following emission control in­formation (Figure 4a):

Label 1/2

4a

➀ EPA/CARB-Engine Family Number
➁ engine type / spec. (only for special

equipment) /Fuel Delivery Timing

➂ engine number
➃ max. engine rated speed
➄ build date
➅ displacement
➆ rated power
➇ “constant speed only” (if requested)
➈ “variable speed” (if requested)

Every engine is equipped with an additional
loose engine type plate. If the original type
plate on the engine is not readily visible after
the engine is installed in the equipment then
the second loose type plate must be attached
on the equipment in such a manner that it is
readily visible to an average person.

The layout is identical for constant-speed and
variable speed application.

70°

F 120 N

M 12.6 Nm

–

–

F 10 N

M 0.35 Nm

–

–

<

<

<

<

START

STOP

+

8

➀

➁

➂

➃

➆

➇

➅

➄

➈

For any offer as well as spare parts orders it is
necessary to mention the following data (also
see spare parts list, page 1):

➁ engine type / spec.

(only for special equipment)

➂ engine number
➃ max. engine rated speed

Attention:

If the engine was certified for constant-speed
application and shall be used so, the field "con­stant-speed only" is marked with “X”.
If the engine was certified for variable speed ap­plication and shall be used so, the field "variable
speed" is marked with “X”.

Always install the engine for its intended appli­cation in order to comply with EPA and CARB
emission regulation requirements.

Label 2/2

4b

The engine must be operated with “LOW SUL­FUR FUEL OR ULTRA LOW SULFUR FUEL
ONLY”.
The label also states the applicable emission­related power category of the engine.

Fuel label

4c

The fuel label is placed nearby the fuel inlet.
If there was no fuel tank mounted to the engine,
the label has to be permanently attached to the
equipment near the fuel inlet.

3.6. EMISSION-RELATED
INSTALLATION INSTRUCTIONS

See supplemental information for EPA certified
engines, Page 35; resp. supplemental informa­tion for California regulations for off road
engines, Page 51.

9

LOW SULFUR FUEL OR ULTRA

LOW SULFUR FUEL ONLY

EMISSION CONTROL INFORMATION

LOW SULFUR FUEL OR

ULTRA LOW SULFUR FUEL ONLY

❏ < 8 kW / ❏ 8-19kW / ❏ 19-37kW /

❏ 37-56 kW PM Standard: 0.3 g/kWh

Power category:

Label 2/2

4. Operation

4.1. Before initial start-up

Engines are normally delivered without fuel and
oil.

4.1.1. Engine oil

Qualified are all trademark oils which fulfil at
least one of the following specifications:

ACEA – B2 / E2 or more significant
API – CD / CE / CF / CF-4 / CG-4 or more

significant.

If engine oil of a poorer quality is used, reduce
oil change intervals to 150 hours of operation.

Oil viscosity

5

Choose a viscosity according to the ambient
temperatures where the engine is to be started
from cold.

The engine must be in a horizontal position be­fore adding oil or checking the oil level.

6

– Pull out dipstick „1“ and add engine oil of the

correct specification and viscosity up to the

„max“ mark on the dipstick; (Chapter 3.1.).

4.1.2. Oilbath air cleaner

7

– Take off the oil reservoir and fill it up to the

mark „1“ using engine oil.

– Attach the oil reservoir, making sure that seal-

ing ring „2“ is correctly seated and catches „3“
are tight.

2393 / 6

2

3

1

1

-40

-30

-20

-10

0

10

20

30

40

50

104

86

68

50

32

14

-4

-22

-40

OIL: SAE...

°C°F

5W/30

5W/40

10W/40

10W/30

15W/40

30

40

122

10 W

10

4.1.3. Fuel

Only refuel when engine is stopped.

Never refuel close to open flames or
flammable sparks, don’t smoke. Use only pure
fuel and clean replenishing cups. Don’t spill
the fuel.

All diesel fuels sold as fuel and complying with
the following minimum specification can be
used:

EN 590 or
BS 2869 A1 / A2 or
ASTM D 975 - 1D / 2D

8

– Before the first start or if the fuel tank has

been run dry, completely fill the fuel tank with
diesel.
The fuel system is bled automatically if the
fuel tank is attached to the engine or located
higher than the injection pump.

9

– If the fuel tank is not mounted on top of the

engine, or is at a lower level, operate the lever
on the fuel feed pump until fuel is heard to
flow back to the tank through the return line.

10

– On fully encapsulated engines, move sleeve

„1“ to one side to gain access to the feed
pump.
After operating the feed pump, make sure that
the sleeve is replaced correctly and makes a
good seal.

1

2292 / 4

2287 / 11

2286 / 2

11

At temperatures below 0 °C, winter-grade fuel
should be used or parafin added to the fuel well
in advance.

4.1.4. Mechanical oil pressure

monitor

(optional extra)

The mechanical oil pressure monitor should be
activated:

• when first filling, or after running the fuel tank

dry.

• if engine shut down automatically because lu-

bricating oil supply was inadequate.

• after freeing it by turning at low temperatures

(Chapter 4.2.4.)

• after replacing the fuel filter, Chapter 5.4.1.

– Add fuel, chap. 4.1.3.

– Check engine oil level, chap. 5.2.1.

11

– To activate the monitor, press lever „1“ for

approx. 15 seconds.

12

– If the engine has a full capsule, press pin „1“

for app. 15 seconds.

– If the engine has a fuel feed pump, operate its

lever for several strokes at the same time
(Figs. 9 and 10).

– Re-assemble all parts repositioned or re-

moved. Check that capsule elements make a
good seal.

2392 / 12

1

1

Lowest ambient

temperature when

starting, in °C

Paraffin content for:

Summer Winter

fuel fuel

0 up to –10 20 % –
–10 up to –15 30 % –
–15 up to –20 50 % 20 %
–20 up to –30 – 50 %

12

13

Instructions to activate the mechanical oil pres­sure control are mentioned on the sticker placed
on the engine.

IMPORTANT !
Even with mechanical oil pressure monitoring
the oil level must be checked every 8 – 15
operating hours (Chapter 5.2.1.).

4.2. Starting the engine

Do not run the engine in closed or

badly ventilated rooms – danger of
poisoning ! Before the engine is started, al­ways make sure that nobody is in the danger
area (moving parts on engine or machinery)
and that all safety guards are in place.

Check that the starting handle is in good condi­tion: renew tubular grip if broken, worn drive pin
etc.
Lightly grease the sliding-contact area between
the starting handle and the guide sleeve.

14

Never use any spray starting aids.

4.2.1. Preparations for starting

– If possible, disengage the engine from any

driven equipment. The auxiliary equipment
should always be placed in neutral.

15

– Set speed control lever „1“ to a position be-

tween 1/2 START and max. START, according
to requirements. Selecting a lower engine
speed will reduce smoke when starting.

– Make sure that stop lever „2“ - if fitted - is in

the operating „START“ position.

2396 / 3

2

1

START

START

STOP

STOP

050 145 00

L3 / 250

13

16

17

– Turn the decompression lever until stop „1“ is

reached. In this position the automatic decom­pression system is heard to engage and the
engine can then be started; Figs. 16 and 17.

18

After the automatic decompression device has
engaged at its limit stop, five turns of the crank
handle are needed for the engine to build up
compression and fire again.

4.2.2. Starting with the handle

For preparations to start the engine,
see Chapter 4.2.1.

19

For correct position to adopt when starting the
engine, see Fig. 19.

5x

050 252 00.874

1

0

2292 / 6

1

0

2283 / 4

14

– Take hold of the starting handle with both

hands and turn it at increasing speed. The
maximum speed of rotation must have been
reached by the time the decompression lever
has returned to the „0“ position (compres­sion). As soon as the engine has started, pull
the starting handle out of the guide sleeve.

– If the engine backfires because the crank han-

dle was not turned firmly enough (the engine
may even start to run backwards), release the
crank handle immediately and stop the engine
(Chapter 4.3.).

There is a risk of injury from the

rotating crank handle.

– To restart the engine, wait until it has come to

a standstill, then repeat the starting prepara­tions.

Safety precaution

For greater protection against accidental injury
when starting with the handle, a handle with
kick-back damping can be used.

4.2.3. Starting with the handle with

kick-back damping (retrofit)

For preparations to start the engine,
see Chapter 4.2.1.

– For correct position to adopt when starting the

engine, see Fig. 19.

20

– Always hold tubular grip „1“ with both hands.

– Turn the handle slowly until the pawl engages

in the ratchet, then increase turning force to
build up speed. The highest speed must have
been reached when the decompression lever
returns to the „0“ position (compression). As
soon as the engine has started, pull the start­ing handle out of the guide sleeve.

You must hold the tubular grip firmly to

maintain contact all the time between
the starting handle and the engine. Maintain
turning force during the entire hand starting
operation.

If backfiring occurs when starting the engine be­cause the crank handle was not turned firmly
enough, the brief reverse rotation at the handle
tube separates the link between crank lug „2“
and driving dog „3“ (Fig. 20).

– If the engine begins to run backwards after

backfiring (smoke emerges from air cleaner),
release the crank handle immediately and stop
the engine (Chapter 4.3.).

– To restart the engine, wait until it has come to

a standstill, then repeat the starting prepara­tions.

3

2 1

2395 / 4

15

4.2.4. Starting in cold weather

At temperatures below app. –5 °C, always turn
the engine over to ensure that it rotates freely.

– Move the speed control lever to the START

position; Fig. 15.

– Move the decompression lever to a position

not as far round as starting position „1“
(Figures 16 and 17).

– Turn the engine over with the starting handle

until it is felt to rotate more freely (10 – 20
turns of the starting handle).

– If mechanical oil pressure monitoring is

fitted, press lever „1“ or pin „1“ in for about
15 seconds (Figs. 11 and 12).

21

22

– Remove dirt from the cover of the metering

device and the surrounding area. Pull off the
cover; Figs. 21 and 22.

– Add a free-flowing lubricating oil to the

housing until the level reaches the upper rim.
Replace the cover and press it in firmly. Two
filling operations in succession are needed.

– Turn the decompression lever until

limit stop „1“ (fig. 16 and 17).

– After this, start the engine immediately.

Chap. 4.2.1. / 4.2.2. / 4.2.3.

4.2.5. Electric starter

For preparations to start, see Chapter 4.2.1.

– The decompression lever remains in pos. „0“.

Starting procedure

23

– Insert the key to its stop and turn it to

position I.

– Battery charge telltale „2“ and oil pressure

warning „3“ must light up.

1

2

3

4

5

2392 / 9

2283 / 8

16

– Turn start key to position II (fig. 23).

– As soon as the engine runs, release the start

key. It must return to position I by itself and
remain in this position during operation.
The battery charge telltale and oil pressure
warning must go out immediately after start­ing. Indicator light „1“ is on when the engine
is in operation.

– If anything seems to be incorrect, stop the en-

gine immediately and trace and rectify the fault
(chapt. 6).

– The engine temperature display „4“ (additional

equipment) lights up if the temperature at the
cylinder head becomes too high.

Switch off the engine and trace and elimi­nate the cause of the problem, chap. 6.

– Always turn the start key back to position 0

before re-starting the engine. The repeat lock
in the ignition lock prevents the starter motor
from engaging and possibly being damaged
while the engine is still running.

Never operate the electric starter when

the engine is running or coasting to a
standstill. There is a risk of broken starter pin­ion or ring gear teeth.

Important:

If a start protection module is installed, the start
key has to be returned to position 0 for at least
8 seconds if the engine has failed to start before
a further attempt to start the engine can be
made.

Preheating device with automatic
heating timer

(additional equipment)

The preheating light „5“ lights up additionally at
temperatures below 0° Celsius (Fig. 23).

– After the light has gone out, start the engine

without delay.

Automatic electrical shutdown system

(additional equipment)

This is characterized by a brief flashing of all
pilot lamps once the starter key has been turned
to position I (Fig. 23).

Important !

If the engine cuts out immediately after starting
or switches off by itself during operation, a
monitoring element in the automatic shutdown
system has tripped. The corresponding indicator
light (Fig. 23, positions 2 - 4) will come on.
After the engine has stopped, the display con­tinues to glow for about 12 seconds.
The electrical device then switches itself off au­tomatically.
The display lights up again after the start key
has been turned back to position 0 and then to

position I again.
Trace and eliminate the cause of the operating
fault before trying to restart the engine

(see chapter 6).

The display light goes out when the engine is
next started.

Even with automatic shutdown monitoring the
oil level must be checked every 8 – 15 operat­ing hours (Chapter 5.2.1.).

17

4.3. Stopping the engine

Never stop the engine by moving the

decompression lever. During breaks
in work or at the conclusion of the working pe­riod, keep the starting handle and starting key
in a safe place, out of reach of unauthorized
persons.

24

– Move speed control lever „1“ back to the

STOP position.

– On engines with the lower engine speeds

not accessible, move speed control lever „1“
back, then move stop lever „2“ in the STOP
direction. Hold it there until the engine has
stopped.

– Release the stop lever „2“ when the engine

has stopped, making sure that the lever re­turns to its normal operating position.

Electrical system

25

The charge „2“ and oil pressure telltales „3“
come on.

– Turn the key to the 0 position and pull it out.

The telltale lights must then go out.

Note:

Engines with an automatic electrical shutdown
system (Chapter. 4.2.5.) can also be switched
off by turning the start key back to position 0.

1

2

3

4

5

2396 / 3

2

1

START

START

STOP

STOP

18

19

5. Maintenance

The engine must be stopped before any maintenance work is attempted.

Comply with legal requirements when handling and disposing of old oil, filters and
cleaning materials.
Keep the engine’s starting key and starting handle out of reach of unauthorized persons.
To immobilize engines with an electric starter, disconnect the negative battery terminal.
At the end of the maintenance work, check that all tools have been removed from the engine and
all safety guards, covers etc. replaced in their correct positions.
Before starting the engine, make sure that nobody is in the danger area (engine or driven
machinery).

5.1. Maintenance summary

Maintenace intervals Maintenance work required Chap.

Every 8 – 15 operating
hours or before daily
starting.

Check oil level.
Check area round combustion air input.
Check the air cleaner maintenance indicator.
Check the cooling air zone.
Check the water trap.
Check the lower part of the oilbath air cleaner for
correct oil level and freedom from dirt; renew oil if
sludge has formed.

5.2.1.

5.2.2.

5.2.3.

5.2.4.

5.2.5.

4.1.2.

5.3.1.

Every 250 operating
hours

Maintenance of oil bath air filter.
Replace engine oil and oil filter.
Check and adjust tappet clearance.
Clean cooling air system.
Examine screw connections.
Cleaning mesh insert in exhaust silencer

5.3.1.

5.3.2.

5.3.3.

5.3.4.

5.3.5.

5.3.6.

Every 500 operating­hours

Replace fuel filter.
Maintenance of dry-air filter.

5.4.1.

5.4.2

8-15

500

250

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The above maintenance chart is supplied with
every engine. This label should be affixed to the
engine or equipment in an easily visible position.
The maintenance chart governs the maintenance
intervals.

For new or reconditioned engines, the following
must always be carried out after first 25 operat-

ing hours:

– Replace engine oil and oil filter, chap. 5.3.2.

– Check tappet clearance, and adjust if neces-

sary, chap. 5.3.3.

– Examine screw connections, chap. 5.3.5.

Do not tighten the cylinder head fastening.

For short operating periods: replace engine oil

and oil filter after 12 months at the latest, re­gardless of the number of operating hours.

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