Robin EH30V User manual

ROBINAME
ROBIN TO WISCONSZN ROBIN
ENGINE MODEL CROSS REFERENCE LIST
ROBXN
EY 08
EY15
EY15V
EY20
EY20V
EY23
EY28
EY3
5
EY40
EY45V
EY2 1
EY44
EY18-3
EY25
EY27
EHll
EH12
EH15
EH17
EH2 1
EH25
EH30
EH3OV
EH34
EH34V
EH43V
EC13V
DY23
DY27
DY30
DY35
DY4
1
WISCONSIN ROBIN
SIDE VALVE
w 1-080
W1-145
w1-145v
W1-185
Wl-185V
W 1-230
W 1-280
W1-340
W 1-390
w 1 -450v
EY21
W
EY44W
EY25W
EY27W
EY 18-3 W
-
WO1-115
wo1-120
WQ1-150
WO1-170
wo1-210
WO 1-250
WO1-300
WO
1 -300v
WO 1-340
WO1-340V
WO1-43OV
TWO CYCLE
WT1-125V
DZESEL
WRD1-230
WRD 1-270
WRD1-300
WRD1-350
WRD1-410

Section Title
ONTENTS
Page
1 .SPECIFICATIONS ......................................................................................
2JERFORMANCE ........................................................................................
2- 1 MaximumOutput ...............................................................................
2-2 MaximumTorqueAtMaximumOutput ..............................................
2-3 performance curves ...........................................................................
3. FEATURES ................................................................................................
4.GENERALDESCRIPTION OF ENGINECOMPONENTS..... ....................
4- 1 CylinderAndCrankcase .....................................................................
4-2 ~~i~~~~~i~~ cover ...........................................................................
4-3 Crankshaft .........................................................................................
4-4 ConnectingRodAndPiston .............................................................
4-5 Camshaft ...........................................................................................
4-6 ValveArrangement .............................................................................
4-7 CylinderHead ....................................................................................
4-8 GovernorSystem ...............................................................................
4-9 CoolingSystem ..................................................................................
4- 10 Lubrication .........................................................................................
4- 1 1 Ignition System ..................................................................................
4- 12 Carburetor ..........................................................................................
4- 13 Air Cleaner .........................................................................................
4- 14 Balancers ............................................................................................
4- 15 Decompression System ......................................................................
1
2
2
2
2
4
4
4
4
5
5
5
6
6
6
7
7
8
8
8
9
9
4- 16 SectionalView Of Engine ..................................................................
10
12
12
12
13
28
42
42
42
43
5.DISASSEMBLY AND REASSEMBLY ......................................................
5- 1 PreparationsAndSuggestions ...........................................................
5-2 Special Tools .....................................................................................
5-3 DisassemblyProcedures .....................................................................
5-4 ReassemblyProcedures ......................................................................
6.MAGNETO .................................................................................................
6- 1 FlywheelMagneto ..............................................................................
6-2 Basic Theory ......................................................................................
6-3 WiringDiagram ..................................................................................
7.AUTOMATIC DECQMPRESSlON SYSTEM ............................................. 44
8.CARBURETQR ...........................................................................................
45
45
46
48
48
52
8-
1 OperationAndConstruction ..............................................................
8-2 DisassemblyAnd Reassembly .................... - .......................................
g.STARTINGSYSTEM ................................................................................
9- 1 RecoilStarter .....................................................................................
9- 2 Electric StartingMotor(Option) ........................................................

ECIFICATIONS
Model
Type
Bore
X Stroke
PistonDisplacement
MaximumHorsepower
MaximumTorque
Rotation
Cooling
Lubrication
Lubricant
Carburetor
Fuel
Fuel Feed
GovernorSystem
IgnitionSystem
SparkPlug
LightingCapacity
StartingSystem
DryWeight
DimensionsWithout
P.T.0 Shaft
LXWXH
I I
EH30V
EH34V EH43V
1 I
Air-Cooled, 4- Cycle, VerticalShaft,Overhead Valve, GasolineEngine
78x61mm
(3.07 X 2.40 in.)
291cc
(1
7.76 cuin.)
9/3600 HP/rpm
(6.7/3600 KW/rpm)
1.95/2500 kg * m/rpm
14.1/2500ft.lbs/rpm)
84 X 61 mm
(3.31 X 2.40 in.)
338 cc
(20.63 cu.in.1
1 1 /3600 HP/rpm
(8.2/3600 KW/rpm)
2.41 /2500 kg m/rpm
17-4/2500 ft.lbs/rpm>
89x69 mm
(3.50 X 2.71 in.)
429 cc
(26.1
8 cu.in.1
13/3600 HP/rpm
(9.7/3600 KW/rpm)
2.85/2500 kg m/rpn.
(20.6/2500 ft.Ibs/rpm
Counterclockwise
As ViewdFromPTOShaft Side
ForcedAirCooling
Oil PumpType Pressurised lubrication
withfullflowoilfiltel
Automobile Oil SAE
# 20,# 30 or 1 OW - 30
HorizontalDraftType
AutomobileGasoline
GravityType
CentrifugalFlyweightType
FlywheelMagneto(SolidState)
NGK BP6ES (CHAMPION N9Y)
12V-2.5A/3000rpmBatteryCharge
RecoilStarter (Electric StarterOptional)
28 kg (61.7 I bs.)
31 kg (68.3 I bs.)
386
X 383 X 327 mm (1 5.20 X 15.07 X 12.88 in.)
410 X 401 X 349 mm
(1 6.1 4X 15.78X 13.74 in
Specificat[onsanddimensions are subject to changewithoutnotice.
-1-

2. PERFORMANCE
2-1 MAXIMUM OUTPUT
The maximum output of anengine is such a standard power asproducedbytheenginewith
its throttlevalvefully opened after its initialbreak-in period when allthemoving parts are
properlywornin.Therefore,a new enginemaynotproducethe maximum outputinthebeginning
because the moving partsare notin a properlyworn-in condition.
2-2 MAXIMUM TORQUE
The maximum torqueindicatesthetorque at theoutputshaft when theengineisproducingthe
maximum output.
2 - 3 PERFORMANCE CURVES
EH30V
a
1
kg - m
REVOLUTION r. P. m
-2-

0 EH34V
I
11
10
9
a:
g8
a
W
cn
a:
0
I
7
6
0 EH43V
13
a
I
It l2
11
10
9
8
n
I
MAXIMUM TORQUE
I
10 2000 2500 3000 3500 4000
L
REVOLUTION - I. P. m.
2.5 kg- m
2.4
2.2
2.1
w
3
8
P
L 1500 2(
=
MAXIMUM TORQUE
0
2500
3000
3500
REVOLUTION -+ r. P. m.
-3-

3. FEATURES
1. Theoverheadvalvedesignofferscompactness,lightweightand ideal combustion charastristics ,"-,
resultingin morepower from less fuelandprolongedengine life.
2. Thevibrationfreedesignwiththetwinbalancersystemandlighterreciprocatingparts.
3. The parts suchasalargecapacitymuffler,dualelementair cleaner, helical typebalancergear
with extra longteethanda blower housingandmuffler covermade of resinlaminated
"DAMPING SHEET" reduce noise to a minimumlevel.
4. Theautomaticdecompressionsystemofferseasy,dependablestarting.
5. Themufflerandcarburatorare located on oppositesides,makingthearrangementsforcooling
air flowmuch easierinthedesign
of power equipment.
4. GENERALDESCRIPTION OF ENGINE COMPONENTS
4-1 CYLINDER AND CRANKCASE
Thecylinderandcrankcase is singlepiece
aluminumdiecasting.Thecylinderliner,made
of special castiron, is molded intothe aluminum
casting.
Thecrankcasehasamountingsurfaceonthe
outputshaftside, where themainbearing cover
is attached. (See Fig. 1.)
Fig. I
4-2 MAIN BEARING COVER
The main bearing cover is an aluminum
diecasting, which
is mountedon the outprt shaft
side of the crankcase. Remove the main bearing
cover
to inspectinside of theengine.
The main bearing cover alsofunctionsasan oil
pan,with
a trochoid oil pump, oil fillerand oil
drainplug. (See Fig. 2.)
Fig. 2
-4-

4- 3 CRANKSHAFT
Thecrankshaft is forgedcarbonsteel,andthe
e crankpinisinduction-hardened.Theoutput end
of theshafthasacrankshaftgearandbalancer
gear which arepressedintoposition.
(See Fig.
3.)
BALANCER GEAR
\
CRANKSHAFT GEAR
Fig. 3
4-4 CONNECTING ROD AND PISTON
Theconnectingrodisforgedaluminumalloy,
anditslargeandsmallendsfunctionas
bearings.Thepiston
is an aluminum -alloy
casting,andcarriestwocompressionrings and
one oil ring.(See Fig. 4.)
Fig. 4
4- 5 CAMSHAFT
Thecamshaft is a hollow shapedand made of
specialcastironwiththecamshaftgearcasted
together.
A . cenerifugaldecompressionlever is assembled
on thecamshft.Thelubrication
oil pump is
driven by thepininstalled on theend of the
camshaft. (See
Fig. 5.)
Fig. 5
-5-

4- 6 VALVE ARRANGEMENT
Theintakevalve is located at flywheelside of
thecylinder head.
Hardalloyvalveseatsare molded in the
cylinderheadandstelliteisfused to the exhaust
valve face.
Thecylinderbaffleleads cooling air
to the
exhaustvalveareafortheoptimum cooling.
(See Fig. 6.)
EXHAUST'VALVE INTAKE VALVE
Fig. 6
4-7 CYLINDER HEAD
Thecylinder head is analuminumdiecasting,
whichutilizes wedge typecombustionchamber
forthehighestcombustion efficiency.
(See Fig.
7.)
4- 8 GOVERNOR SYSTEM
Thegovernor is a centrifugalflyweighttype
which ensuresconstantoperation
at the selected
speedagainst load variations.
Thegovernorgearwithgovernorweights is
installedonthebearing cover anddrivenby
thecamshaftgear. (See Fig.
8.)
Fig. 7
Fig. 8
-6-

4-9 COOLING SYSTEM
Thelargefins on the flywheelprovidesufficient cooling aircapacityforthe inletand exhaust
areaandcylinder.
a Thecylinderbafflehelpsthecoolingair flow efficiently.
4- 10 LUBRICATION
Both EH30V(EH34V) and EH43V haveatrochoidpumpinsidethemainbearing cover thatis
driven by thecamshaft.
EH3OV and EH34V use forcedsplash
type lubrication while thelarger EH43V employs apressurized
-lubrication which pressurelubricatesalltherotatingsurfaces of thecrankshaftandsupplies
oil to piston,cylinderandconnectingrod’ssmallendfromthe oil jet on crankshaft arm.
(See
Fig. 9.)
OIL FILTER
/
BEARING ,COVER I
CAMSHAFT
Fig. 9
-7-

4- 1 1 IGNITION SYSTEM
The ignition systemisatransistorcontrolled
magnetoignitionsystemwhichcosists of a
flywheel andanignition coil withabuilt in
transistormounted on thecrankcase.
Thissystemhas
an ignitiontimingadvance for
the easy starting. (See Fig. 10.)
Fig. 10
4- 12 CARBURETOR
Theengines are equippedwithahorizontal
draftcarburetorthat has
a floatcontrolled fuel
systemandafixedmain
jet.
Thecarburetorsarecalibratedcarefully for the
surestarting,
good acceleration, low fuel
consumptionandsufficient output.
For thedatails,refer to page 45, section "8
CARBURETOR". (See Fig. 11.1
Fig. 1 1
4- 13 AIR CLEANER
Theair- cleaner isaheavy-dutytypewitha
dualelementsystem. (See
Fig. 12.1
I A CLEANER BASE I
ELEMENT
I CAP hUT I
Fig. 12
-8-

4- 14 BALANCERS
Unbalanced inertiaforce is balanced by thetwo
balancerswhichrotateatthe samespeedwith
thecrankshafttoeffectivelyreducevibration.
(See
Fig. 13.)
I BLANCER
4- 15 DECOMPRESSION SYSTEM
An automatic decompressionmechanismwhich
opensexhaustvalvebeforethepistonreaches
compression top is assembled on thecamshaft
foreasystarting. (See
Fig. 14)
Fig. 13
I
AUTOMATIC DECOMPRESSOR SYSTEM
*$
RETURN SPRING
Fig. 14
-9-

4- 16 SECTIONAL VIEW OF ENGINE
r
FLYWHEEL(COOLING FAN)
r STARTINGPULLEY
I-
RECOIL STARTER
- lo -

BALANCERSHAFT 2
BALANCERSHAFT 1
CONNECTING ROD
TMUFFLER
CAP
M
CARBURETOR
AIRCLEANER
OIL FILTER
CAMSHAFT
- 11 -

5. DISASSEMBLY AND REASSEMBLY
5- 1 PREPARATIONS AND SUGGESTIONS
1) When disassembling theengine, memorize well the locations of individual parts so thatthey
can be reassembed correctly.
If yor areuncertain of identifying some parts, it issuggested
thattags
be attachedtothem.
2) Have boxes readytokeep disassembed partsbygroup.
3) To preventmissingandmisplacing,temporarilyassembleeachgroup of disassembedparts.
4) Carefullyhandledisassembed parts,and clean themwith washing oil if necessary.
5) Use thecorrect tools inthecorrect way.
5-2 SPECIALTOOLS
Tool No.
Use Tool
209 - 95004 - 07
For pulling off the flywheel
Flywheelpuller with
bolt
228 - 95003 - 07
Forplacing piston ring
Pistonring compressor
PISTON RING COMPRESSOR
/
FLYWHEEL PULLER
Fig. 15
- 12 -

5- 3 DISASSEMBLY PROCEDURES
Part to remove
Oil drain
Procedures Tool
Remarks
Remove oil drain plug and drain oil.17mm Box wrench Be carefulnot to lose
the gasket.
Fuel tank
(1) Turn off fuel shut - off valve and
(2) Fuel shut-off valve and fuelline.
lOmm
Box wrench
removefuel
tank.
6 d X ~OITUII Bolt *.**--** 2pcs.
6 4 X 35m Bolt *-.-..*. 1 pce.
I
6 + BOLT AND WASHER
Fig. I6
- 13 -

Step
Air cleaner 3
Part to remova Procedures
(1) Remove air cleaner cover and element.
6 d Plastic nut
6 d Wing nut
6 d X 2Omm Bolt .--. lpce.
6 d x lOmm Bolt *.-e lpce.
base and crankcase.
cleaner) from stud bolts.
6 Nut --** 2pcs.
(2) Remove air cleaner bracket
(3) Remove breather hosefromcleaner
(4) Remove cleaner base and gasket (Air
Remarks Tool
lOmm Box wrench
lOmm Box wrench
CLEANER COVER
6 Q FLANGE NUT: 2pcs. 6 Q FLANGE BOLT
Fig. 17
- 14 -

tep
4
control
Procedures
(1) Removespeed control assemblyfrom
crank
case. Thengovernorspringfrom
governor lever.
6
q5 X 16mmBolt -... 2pcs.
(2) Remove choke rodfromspeed
control
assembly, then remove chokerodfrom
choke shaft of the carburetor.
Remarks
Memorize or mark the
govenor spring hooking
position.
1
Governor (1) Remove governor leverfrom governor
lever shaft.
6
q5 x 25mmBolt *-a. lpce.
(2) Removerod spring andgovernorrod
from governor lever, then removerod
spring andgovernor rod fromthrottle
shaft
of the carburetor.
Tool
10mm Box wrench
10mm
Box wrench
Ppcs.
GOVERNOR SHAFT
/
ROD SPRING
Fig. 19
- 15 -

Step Remarks
Procedures
Part to remove
6
Carburetor
(1) Remove carburetor from stud bolts.
(2) Removegasket ( Insulator ) and
insulator from stud bolts.
Muffler (1) Remove muffler and muffler cover
from stud
bolts.
8 4 x 16mm Bolt .... lpce.
bolts.
84 Nut........ ..... 2pcs.
(2) Remove gasket(Muffler) from stud
Be careful notto
lose
the gasket.
Tool
12mm Box wrench
Fig. 20
- 16 -