PARMA-TECHNIK MIKRON III A Operating instructions

','
PARMA-TECHNIK, s.r.o.
Uherskobrodska 962
763
26 Luhacovice
CZECH REPUBLIC
AEROTECHNIK Tel: + 420 577
131 210
~s.r.o.
Fax:+ 420577131210
e-mail: [email protected]
OPERATING AND MAINTENANCE MANUAL
MIKRON III A II
AIRCRAFT ENGINE AND ITS VERSIONS
Document No.: 610902
Issue: 5/92

MAINTENANCE INSTRUCTIONS
MIKRON IliA
1. General
1.1 Content, List of Effective Pages Page
Issued
1. CONTENT, LIST OF EFFECTIVE PAGES ...........................................................1
8/99
................................................................................................................................... 2
8/99
1.2
LIST OF REVISIONS AND AMENDMENTS ..............................................................3
8/99
2. SPECIFICATION ......................................................................................................4 9/95
2.1
TYPE DES[GNA TION ............................................................................................4
9/95
2.2
CYLINDER MARKING .......................................................................................... 5
5192
3. TEClINICAL DATA ..............;...................................................................................6
9/95
3.1 DIMENSIONS AND WE!GHTS ................................................................................6 9/95
3.2 ENGINE ACCESSORlES ........................................................................................6 9/95
.................................................................................................................................7
5192
3.3 PERFORMANCE ...................................................................................................7
5192
3.4
ENGINE SPEED ....................................................................................................7
5192
3.5
FUELS AND LUBRlCANTS ....................................................................................7 5/92
.................................................................................................................................8 5/92
3.6 CYLINDER HEAD TEMPERATURE ........................................................................8 5/92
3.7
FUEL AND OIL CONSUMTION .............................,.................................................8
5192
4. POWER CHAllACTERISTICS ...............................................................................9
5/92
5.
OPERATING INSTRUCTIONS .............................................................................10 9/95
5.1 BEFORE ENGINE STARTING ............................................................................... 10
9/95
5.2 ENGINE STARTING ...........................:................................................................ 10 9/95
5.3
WARM-UP AND INCREASING POWER SETrING .................................................. 11
9/95
5.4
TAKE- OFF ........................................................................................................ 11
9/95
5.5
CRUISING FLIGHT ............................................................................................. 12
5/92
5.6
ENGINE SHUTDOWN .......................................................................................... 12
5/92
5.7
IN- FLIGHT ENGINE SHUTDOWN ...................:.................................................... 12
5192
5.8
IN- FLIGHT ENGINE STARTING .......................................................................... 12
5/92
5.9
NOTE ...........................................:......................................................:............. 13
5/92
6.
INSTRUCTION FOR MAINTENANCE .......................................................,.......14
8/99
6.1 DAILY CHECK ................................................................................................... 14
8/99
6.2
PERl ODIC CHECK ............................................................................................... 14 8/99
6.3
LIST OF WORKS DURlNG PERlODIC CHECKS ....................................................... 15
8/99
............................................................................................................................... 16 8/99
...........................................................................:................................................... 17
5/92
6.4 SERVICING PRlOR THE FIRST ENGINE STARTING ...........;.................................. 18
5192
6.6 INSPECTION AFTER THE FIRST 25 HOURS OF OPERA TfON .................................. 18
5/92
6.7 ENGINE PRESERVATION .................................................................................... 19
5192
6.8 WINTER OPERATION ......................................................................................... 19
5/92
Date of issue: 8/99
lleCmnent No.: 610902
l'-----ll

..
l\lAINTENANCE INSTRUCTIONS
MIKRON lilA
7. MAINTENANCE ......................................................................................................20
7.1 OIL CHANGE ..................................................................................................... 20
7.2 COMPRESSION CHECK ...................................................................................... 20
7.3 VALVE CLEARANCEADJUSTMENT ................................................................... 21
7.4 ADJUSTMENT OF IGNITION TIMING .................................................................. 21
7.5 SPARK PLUGS ................................................................................................... 22
7.6 CARBURETTER
.................................................................................................. 22
7.7 EXHAUST SYSTEM
............................................................................. : .............. 23
7.8 SCREWS AND NUTS ........................................................................................... 23.
7.9 BOWDEN CABLES AND ENGINE CONTROL LINKAGES ....................................... 23
7.10 ALTERNATOR .................................................................................................. 23
8. REPAIR..................................................................................................................... 24
8.1 OVERHAUL ..................... ~ ................................................................................. 24
8.2 MAJOR MAINTENANCE AND REPAIR ................................................................. 25
9 .• TABLE OF OILS ..................................................................................................... 25
10. TIGHTENING TORQUE TA.BLE .......................................................................26
11.
TROUBLESHOOTING .........................................................................................27
............................................................................................................................... 28
............................................................................................................................... 29
...............................................................................................................................30
12. ANNEXES............................................................................................................... 31
12.1 CARBURETTERDRA\VING .......................................................................... : ..... 31
12.2 IGNIT!ON MAGNETOS REPAIRS, DISASSEMBLY AND ASSEMBLy ...................... 32
............................................................... 1 ............................................................... 33
13.
PROTOCOL ON CHECKS AND MAINTENANCE .........................................34
13.1 PERIODIC CHECK.......................................................................................... 34
...............................................................................................................................35
13.2 NON-PLANNED MAfNTENANCE...............,................................................... 36
Date of issue: 8/99
Docmnent No.: 610902

~fAINTENANCE INSTRUCTIONS
~/K
~~!!JL
MIKRON IliA
5193
24.5.1993 Parma
12/94 19.12.1994 Parma
1.2 Record of revisions
To be filled up by the Manual Owner when completing the revision distributed by
the Manufacturer. The new and revised text will be marked by a vertical line in the
right hand margin and a new date
of issue will be given in the lower left hand
comer
of the new page.
1,2,3,4,6,lO,n,14,15,
-012b 9/95 25.9.1995 Parma
16,21,27,32,33
1,2,3,14,15,16,34,35,
4. MIIIA-014a 8/99 13.9.1999 Parma
36
Date of issue: 8/99 DIanoent No.: 610902

4
.,
MIKRON III A SPECIFICATION
2.0. Specification
- four cylinder, four stroke, ignition, inverted engine
- overhead camshaft valve gear
- dry sump pressure lubrication
- dual magneto ignition, either right-hand magneto fitted with
starting spark boost mechanism or one fitted with starting buzzer
direct propeller drive
- dual diaphragm fuel pump
- down-draught carburetter
- mechanical starter for engines not fitted with an alternator
electric starter with a gear ring
rear of the propeller mount and an
alternator at the rear of the engine directly driven by the
crankshaft
2.1. Type Designation
MIKRON
III
A E 1 S
1.
2. 3.
4. 5.
1. - Type
MIKRON III, abbreviated MIll
2. - Manufacturer
Aerotechnik
3. - E
version fitted with and alternator
version not fitted with an alternator
4. - 1
propeller mount for the V 218 fixed pitch
propeller
2
propeller mount for the Ho V 62R or the MTV-I-A
variable pitch propeller
3
fixed pitch propeller mount for the engine
version with alternator not fitted
5. - S
optional modification not fitted with starter
and propeller mount
....
Issued 9/95

5 MIKRON III A SPECIFICATION
---------------------------~-------------------------- _._------
2.2. Cylinder Marking
Sense of rotation
..-----..
Top
Bottom
dead centre
Top dead
centre
1 2 3 4
Right-hand side
Left-hand side
Sense of rotation
cmticlockwise when viewed in the fliqht
direction.
Issued 5/92

6
MIKRON III A TECHNICAL
3.0. Technical Data
3.1. Weights and Dimensions
Type
Number of Cylinders
Bore / Stroke
- swept Volume
Compression Ratio
Sense of Rotation
weight of the dry engine
without exhaust silencer
and propeller mount, with
exhaust manifold and engine
attachment bolts weight in-
cluded (kg)
Propeller mount weight (kg)
3.2. Engine Accessories
DATA
Mikron III AE,
4
90 / 96 mm
2 444 ccm
6 : 1
anticlockwise
Mikron III A
M
IIIAE1 M IIIAE2 M IIIA3 M IIIAS
70,0 70,0 65,9 64,0
6,3
3,8
1,9
Ignition Magnetos: Scintilla, Scintilla Vertex - the right-hand one
Ignition Timing
Firing Order:
Sparking Plugs:
Spark Gap:
Carburetter:
Fuel Pump:
Alternator:
Starter:
with starting spark boost mechanism
or LUN 2225 - one with LUN 2231.1-3 starting buzzer
L.H.
magneto 5 deg. before TDC
R.H.
magneto 10 deg. pofore TDC
1 - 3 - 4 - 2
L-22-62, M 12xl,25 thread, screened
Not determined
Jikov 40 SOP L
2 <M 5.0
626700 - 443 113 514 112, 14V,. 15A
for the MIll AE engine
626 600 - B 76 12V 0,5 kW for the
MIll AE engine
616 500 for the M III A engine
Issued 9/95

MIKRON III A
TECHNICAL DA'l'A
,.7
--------~--------------------------------------------------"---
Propeller Mount:
Drawing No. 73 47 03 for
variable pitch Ho V 62R or
MTV-l-A propellers
Drawing No. 662 110 for the
fixed pitch V 218 wooden pro-
peller and its modifications
3.3. Performance
Take-off Power
48 kW / 65 hp / 2 600 rpm
Maximum Continuous Power ':
48 kW / 65 hp / 2 600 rpm
Cruising Power
35 kW / 48 hp / 2 350 rpm
3.4. Engine Speed
Maximum Speed
2 860 rpm for 3 sec.
Maximum Continuous Speed
2 600 rpm
Cruising Engine Speed:
2 350 rpm
Idling Speed:
550 rpm
3.5. Fuels and Lubricants
Fuel:
Aviation gasoline, unleaded
72 6ct. MM minimum
Unleaded motor car gasoline,
72 oct. MMminimum
Fuel Pressure: 10 - 25 kPa
Oil:
Motor car engine
oil API pf:.'r-
formance rating
SF minimum.
For viscosity
grades s';e
table on page 25.
Consult use of other oil
grades with the engine man".l-
facturer.'
Engine'oil Quantity:
5.2 litres
4.5 litres - minimum qllantity
of oil in oil tank
6.5 litres -m1n1mum oil tank
capacity
Oil Pressure:
500 kPa maximum
" 3,00' - 400 kPa recommended
oper'ation pressure
150 kPa minimum at idling
speed
Issued 5/92

45
20
9
MIKRON III A
PERFORMANCE
4.0. POWER CHARACTERISTICS
35
30
/
/
/
25
./
. /'
/
/
/
I
/
CHARACTERISTICS
1
180 'E
:z:
110 +>
L
ibO
I
/.
/
/
/
v
...Q
380
360,
3~0
310
300
, I I I I
I
2ltOO 2600 2800
1800
2000 2200
n [min"] -P"
Issued 5/92

10
.,
MIKRON III A OPERATING INSTRUCTIONS
5.0. Operating Instruction
Observing instructions for operation and maintenance is a prerequisite
for engine operational reliabi ty.
5.1. Before Starting the Engine
-- 'Ignition magnetos nOFF"
-
Daily Service completed ?
Open throttle and check throttle lever for free motion within full
range of its travel
Open choke, check for free motion within full· range of travel and
shut choke
Turn the propeller by hand for several revolutions and make sure the
starting spark boost mechanism is operating properly
Check for any irregular sound or engine turning resistance reason
5.2. Engine Starting
II
Fuel Cock
" OPEN
II II
Cooling Flap
SHUT
Choke
II OPEN n
Throttle
" IDLE
II
liON II
Main Switch
Battery Charging
" OFF II
.Ignition Magnetos
II ON II
Engine
START II II
Adjust engine speed to 1 000 rpm as soon as-the engine starts. Shut the
choke and make sure that oil pressure is indicated within 10 seconds.
Starting of the M III A engine is accomplished by turning of the
propeller on the ground and the MIll AE engine by pulling at the
starter lever. If the engine is equipped wi th both magneto's without
starting spark boots mechanism, if is necessary to switch on the
starting buzzer when starting theeingine.
It is appropriate, when starting a cold engine in low ambient
temperatures, to provide for a slight fuel excess by turning the engine
several times with ignition magne~tos' swi tched O~F and the fuel cock
OPEN, eventually to inject fuel into the inlet manifold by means of the
acceleration pump actuated.by repeated rapid opening of the throttle.
Preheating the engine and oil tank by means of hot air is recommended
in ambient air temperatures N=low - 5 deg. C.
Issued 9/95

,~
MIKRON III A
OPERATING INSTRUCTIONS
11
5.3. Warm-up and Increasing Power Setting
Maintain approximately 1 000 rpm
for two minutes, then switch battery
charging ON and insrease engine
speed to approximately 1 500 rpm for
2 to 5, minutes, according to
ambient air temperature, t I an oil
temperature of 40 deg. C and a
cylinder head temperature of 120 deg. C
reached. Control by means
cooling flap setting, if required.
Performance Check
Move throttle lever slowly to its take-off power position (continuously
within 2 sec.). The engine must reach the maximum ground speed. Check,
by comparing the engine speed with Flight Manual data.
Check engine acceleration and deceleration moving the throuttle
gradually from idle'to take-off power setting within 2 seconds and back
to idle at identical rate.
Ignition Maaneto Check
Carry out ignition magnetos check by switching. By ~aximum throttle
the prescribed engine speed dro~ at switching - off each magneto
shoved be 30 50 rpm coincidentaly.
Battery Charging Check
Electrical system vOltage should not exceed, at an engine speed
corresponding to take-off power setting, the following values:
14,1 V at an ambient air temperature of 20 deg. C
1417 V at an ambient air temperature of 0 deg C
IS,S V at an ambient a temperature -20 deg. C
Engine cooling is carried out at increased idle power setting of
1 200 rpm.
5.4. Take-off
Set throttle to take off power se~ting
Do not exceed approved limits of cyl'inder head and oil, temperatures
and of oil pressure.
Maintain recommended temperatures by means of cooling flap cont'rol.
Issued 9/95

12
.~
MIKRON III A
OPERATING INSTRUCTIONS
------------------------------------------------------------,--
5.5. Cruising Flight
Engine speed
according to the type of
propeller.
Recommended cruising engine speed is
2 350 rpm.
Temperatures
and pressures within approved
operating
limits.
5.6. Engine Shutdown
The engine is cooled- down in course of descent and
taxying. The enegine may by stopped by switching the
magnetos OFF after cylinder head temperature decreased to
160 deg. C. The engine may be cooled down after long
taxying or after taxying at high power setting running it
at an insreased idle power setting i.e. at 1 200 rpm.
Stopping the Engine:
- Throttle Setting
" IDLE "
-
Ignition Magnetos
"
OFF "
Battery Charging
" OFF "
-
Fuel Cock
"
SHUT "
5.7. In-flight Engine Shutdown
- Power Setting
" IDLE
It
Airspeed,after cooling the engine
down,
" 100 kph "
-
Throttle Setting
" STOP "
-
Ignition Charging
" OFF
It
- Battery Charging
" OFF "
5.8. In-flight Engine Starting
Start the engine following the procedure given in 5.2.
Only the choke should be shut if the engine is still
warm. •
Switch battery charging ON after the engine reached
1 000 rpm. Full power should not be used before reaching
the specified minimum operating temperatures.
Using the Manual Starter
Manual starter of the Mikron III A engine is controiliad
by a short continuous pull of the starter handle so as to
turn the engine over the- compression stroke. This should
be adequate for windmilling starting of the englne
provided that propeller setting was correct and airspeed
sufficient. Violent and long pulling at the handle may
result in starter damage.
Issued 5/92

13
MIKROR III A OPERATING INSTRUCTIONS
___________________________________________________________ c __ _
5.9. Note
The alternator does not charge the battery at engine
speeds lower then 1 000 rpm, but is drawing alternab:>r
field current, approximately 2A from the battery. Switch
battery charging OFF during extended gliding at engine
idle or after in-flight engine shutdown.
The engine may be"started on the ground by means of
turning the propeller or by means of windmilling in
flight, in case of partially discharged battery. The
battery will be charged again with the engine running.
Issued 5/92

o'
l\fAINTENANCE INSTRUCTIONS
MIKRON lilA
A@."
cz ........
6. Instruction for Maintenance.
....
Engine maintenance is performed either after reaching of operating hour interval
(periodic checks) or according to the time limit.
6.1 Daily Check
It is performed before every flight day. however, after each 10 flight hours maximum.
Ignition "OFF"
Examine:
screw. nut and bolt tightening and locking
-cock pull rod and choke pull rod connection and locking and their free operation
in whole range
ignition cables fastening and connection
to the spars
-leakproofuess and locking
of fuel and oil hose connections
-oil penetration from connections on engine
-engine to airframe attachment, silentblock condition
-exhaust pipe and silencer for cracks, burns out and corrosion
-oil intank condition, refill to maximum
Drain and clean the fuel cleaner.
Perform engine test
in the range according to 5.1, 5.2 and 5.3 points ..
6.2 Periodic check
Inspection must be performed in the following interval.at the latest.
1. after first 25 +2 operational hours
2. after each 50 +5 operational hours ..
3. after each 100 +10 operational hours or Ix per 12 months -annual inspection
4. overhaul after 1200 +200perational hours or 15 years
Date of issue: 8/99 Decument No.: 610902 I 14 I

c
-.- .. ~
~1AINTENANCE INSTRUCTIONS
~'
cz "" ...
MIKRON IliA
~IK
"
Maintenance
of ignition magnets IS performed
In
the connection with data
In
"Certificate of quality and completeness".
Inspection interval are ultimate ones.
It depends on operation conditions and total condition of
the engine. It means that periodical inspection can be perfonned sooner regardless the
operational interval has arisen.
6.3
List of works during periodic checks
'"
Action
25h
I 50 h
lOOh
, , .' ",;;. :.
.' ,,:"::.j::,; .. :. "
....
(itqpli~l)
1.
Check cooling shaft and deflectors status (cracks, X X
attachment)
Check oil installation leakproofuess in the critical
2.
places (cylinder-box, covers, oil installation X X X
connections, increased leakage of oil from air-
bleeding.
Check (adjust) valve clearance -O,lmm on cold
3.
engine (after tightening of heads ifit is perfonned), X X X
refill oil in covers
4. Check compression pressures -see 7.2 chapter X
5.
Disassemble and check spark plugs X X X
6.
Perfonn recommended spark plug exchange X
7.
Check status and tightness of fuel installation, X X X
installation, carburetor, cleaning of fuel cleaner .
Check carburetor, clean channels andjets, check
8.
needle valve'tightness and completeness, tighten and X
lock all bolts and connections.
! 9.
Check ad clean ignition magneto covers, check
contact
distance" see 7.4 chapter and check pre- X
ignition.
10.
Check ignition cable status, tenninals, shielding and X X X
cables fastening to engine
Check exhaust system for cracks, corrosions and
II. burnt out. Special care should
be devoted to silencer X X
inside heat exchanger. ' "
12.
Check engine bed for cracks, corrosion, deflections, X X X
pin locking, silentblock status.
...
Date of issue: 8/99 Docmnent No.:
610902
0

C
·.
1\tAINTENANCE INSTRUCTIONS
MIKRON IliA
~~
Action· . ./
.. ;:, '.
.,'
Exchange oil, clean pump screen, exchange oil in
rocker anus covers
(150 cm3, tighten cover nuts by the torque according
13. to 10 chapter) and in the box of hand operating
starter (200 cm))
ifit is used.·Check oil for metal
part presence. Check oil quantity inside fuel pump,
refill
if need.
Check connectionand locking
of all moving
14. elements of engine control, joints, part attachment
and bushing status in fire wall.
Check visually electrical installation, wire fastening,
. '15. integrity
Check starter (pinion and ring status at electrical
16.
, starter)
Check alternator, status
of carbon, carbon holder
17.
and accumulator, ifused
Check and clean activating buzzer contacts, ifused
18.
Clean (wash) engine and internal parts of covers and
19. fire wall
Perform engine test
20.
25h
...
X
X
X
X
50 h .. lOD'h
·'(j\l)nu,al)
X
X
X
X
X
X
X
X
X
X
X
X
Date of issue: 8/99
Jlrocmnent No.: 610902
16

17
MIKRON III A MAINTENANCE INSTRUCTIONS
-----------------------------------------------------------._--
Major inspection of the engine shall be carried out by an
authorized repair station or by the engine manufacturer
only.
Note:
The tightening torque represents the torqu~ value Tt
directly on the cylinder head nuts. In case of using
a torque spanner with an extension it is necessary to
calculate torque to be set on the spanner ~or the
specified Tt using the following formula:
. b
Tt a + b
a:
b
where Ts is the torque value set on the torque spannc~r
is the specified
cylinder head
15 + 2 Hm)
tightening torque value (::or
nuts the specified torque
a leng,tb of the used extension
the square and hexagon)
(distance betwel~n
b length of the torque spanner
the handle and square axes)
(distance betwel~n
Issued 5/92

--------------------------------------------------------------
18
MIKRON III A
MAINTENANCE INSTRUCTIONS
6.4. Servicing Prior to the First Engine starting
First engine starting means starting a new engine, an
engine after its installation into the airframe following
prior heavy maintenance, or an engine which was out of
operation for a longer period, for the first time.
Prior to the first engine starting it is necessary:
- to remove one spark plug from each cylinder and 'Co
inject 20 ccm of oil heated to 50 deg. C into each
cylinder. Piston of the corresponding cylinder has to
be in its bottom dead centre so that all the cylinder
working surface may be wetted by oil
- to bleed and fill thoroughly the hose supplying oil
from the tank to the engine
- to turn the engine manually, with the ignition magnet.os
switched OFF, till the oil pressure gauge indicates cil
pressure
- to screw in clean spark plugs and connect ignition
cables
- to check engine ,control for correct functioning and its
stops for correct adjustment
- to start the engine and carry out an engine test run
- to check oil system installation for leakage, the oil
tank for oil quantity and the engine valves for corn~ct
clearance after the first engine test run.
6.5. Inspection After the First 25 Hours of Operation
It is necessary to operate the engine within the first
25 hours of operation with extreme care and caution. The
engine should be warmed up slowly after starting, only
short test runs should be carried out an full throuttle
operation in low altitudes should be limited to periods
as short as possible.
Carry out carefully the following work during the first
25 hrs inspection in ad(i"i tion to that shown il1 6.3:
- oil change'and inspection for chips and shavings
- examination of the spark plug condition and appearance
oil consumption measurement and comparison of the
result with manufacturer's data.
Issued 5/92

--------------------------------------------------------------
t9
MIKRON III A
MAINTENANCE INSTRUCTIONS
6.6. Engine Preservaion
Engine preservation should be carried out in case that
the engine will not be operated for more than 14 days.
The preservation is good for one month and may be
repeated up to a total period of 6 months. Should the
engine be stored for a longer period, the preservation
should be removed, the engine should be started, warmed
up and operated for 20 minutes at 1 600 to 2 000 rpm.
A new preservation of the engine should be completed
afterwards. Preservation is always carried out after an
oil change and with new oil.
Preservation procedure is the following:
-warm the engine up and stop it by means of shutting off
fuel
- remove the spark plugs and inject engine oil into all
cylinders so that the cylinder walls are completely
wetted by oil
- turn the engine manuailly several turns
~ clean the spark plugs, apply an oil coating and replace
them
- blind all appertures, the 'exhaust manifold, vent.s,
inlet, etc.
- apply oil or preservation grease to all bearings, ball
joints carburetter controls and unprotected metal parts
- it is recommenCled to protect the engine by means of
a canvas cover
To remove engine preservation all plugs used for blind .l.:lg
appertures in course of the preservation should be
removed. The engine 'is then prepared identically to the
preparation for first starting.
6.7. Winter Operation
Before starting operation of the engine in the winter
season an inspection of the daily
service extent should
be carried out.
Besides carry out the following:
- inspection of spark plugs for good condition
~ inspection of ignition timing for correct adjustment
The engine has to be properly adjusted. No special
measures are necessary.
In case that recommended oil temperatures canot be
reached during operation of the engine in low
temperatures it is appropriate to decrease section of air
inlet to the crankcase to approimately one third,
eventually to shut the air inlet off completely, to avoid
oil undercooling.
Issued 5/92

------------------ --
MIKRON III A MAINTENANCE
20
7.0. MAINTENANCE
7.1. Oil Change
Heat the oil to a temperature within 50 and 60 deg.C.Dr all
the oil from the engine through the drain plug in the bottom
part of the oil return line. Drain the oil tank and oil
system, remove the oil filter from the oil pump and remove
valve rocker compartment covers. Examine oil for presence' of
fine chips or metal shavings. The engine manufacturer should
be contacted in case that chips or shavings are present in the
oil. Flush oil filter and covers' of the valve rocker
compartments with gasoline. Fill the valve rocker compartments
with new oil (150 ccm into each compartment) and ace the
valve rocker compartment covers .Change hardened or otherwise
damaged gaskets. Tight the nuts of the covers with torque
according chapter 10.0. The manufacturer can supply the
spanner on the wish of a customer. (Order Nr. 618 527. Turn
the propeller I after filling oil tank with new oil till the
oil pressure gauge indicates pressure. Fill up oil to maximum,
if required. Drain oil from the manual starter box removing the
plug in its bottom part (if applicable). Fill the box with 200
ccm of new oil through an apperture in the upper part of the
box. Check oil amount inside the fuel pump. Oil level must be
up to air outlet bolt thr;ead (crank shaft axe in horizontal
pos ion).
7.2. Compression Check
Compression is checked informatively during each servicing of
the engine,when turning the engine throttle fully open.
Compression is measured during each inspection after 50 hours
of operation by means of a compression meter. ~hiS measurement
should be acoomplished with warm engine the engine test
run been completed and the cylinder head temperature has
dropped to 50 deg. C. With the ignition magnetos switched OFF
remove spark plugs on one side ,of the engine. Set the throttle
to s fully open position. Turn the engine be means of the
starter or manually when measuring compression in the
individual cylinders.
Compression pressures should be 'the, following: .
-
minimum 0.3 M Pa
-maximum difference among the individual cylinders 0.2
M Pa.
Low compression pressure of any cylinder calls for engine
ir by the engine manufacture .
Issued 7/95