J.A.P 6 User Manual

(
MODEL
5
INDUSTR.IAL
UNIT
En§lne.-Petrol,
four-stroke.
Air-cooled.
Type,
Model
5.
Maln
Dlmenslone.-Bore,
80
millimetres,
stroke,
82
millimetres.
Cubic
capacity,
412 c.c,
B.H.P.-4'5
at 2,200
R.P.M.
Valves.-Type,
Mushroom.
Position,
side
valve'
Tappet
clearances:
EXHAUST
'020';
INIÆT
'010'.
Timing
I
EXHAUST
OPENS
48" before
bottom
dead
centre,
-
CLOSES
9"
after
toP
dead
centre.
INLET
OPENS
17'
before
top
dead
centre,
CLOSES
52'
after
bottom
dead
centre.
Camshaft.-Type,
cast
in
one
piece, clriven
by
spur
gear.
Pleton.-Material,
low expansion
alloy'
Number
of
rings, 3. Gudgeon
pin fixing,
circlips.
Connectln5i
Rod.-Materia.l,
40-45
ton
steel.
Type
of
big
end
bearing,
white
metal, steel
backed.
Crankshaft.-Number
of bearings,
2'
Type,
taper
roller.
Carburetter.-Make,
Zenith.
Type
24
T-2.
Ignttlon.-Magneto.
Make,
Wico.
Typ" CJ,
936.
Timing,
20o
belore
top
dead
centre.
Drive,
direct
coupled'
Sparl<ing
plug, size
14
millimetres.
Gap,'025"
LODGTI-CN.
Lubrlcatlon
System.-J.A.I'}.
dipper. Sump
capacity,
2
pints.
Fuel
Tank
Capacity.-l
gallon.
Fuel
Consumptlon"-'9
pints
per
ts.H'P.
hour.
Wetght.-122
lbs.
(55'5
Kilogrammes).
RECONDITIONI}{G
DIMENSIONS
Cyllnder Bore.-Diameter
3'170"
or 3'190'.
Overelze
Plstons
Avallable.-+
'020' and
f
'040".
Underelze
Bearing,s
Avallable.-Connecting
rod, 1'1150"
to l'1050".
RECOMMENDED
CLDARANCES
ON
RECONDITIONING
Clearances.-Crankshaft
and connecting
rod,
big-end
'001' to
'0025'.
Side
clearances,
connecting
rod
and
crankshaft,
'004" to
'009'.
Gudgeon
pin and connecting
rod,
small
end '0005'to
'0014" Gudgeon
pin and
piston,
'0002'to
'0009'.
Plston.-On
diameter
of
piston at right
angles
to
gudgeon
pin
:
'008'
skirt,
'017'
top land,
Between
piston rings and
grooves,
'0035'
to
'0055'. Between
scraper
ring and
groove, '0015'to
'0035'.
Prae
6
MODEL
6
INDUSTRIÅL
UNIT
Engine.-Petrol,
four-stroke.
Air
cooled'
Type,
Model
6'
Maln
Dimensions.-Bore,
85.7
millimetres.
Stroke,
102
millimetres.
Cubic
capacitY
5BB
c.c.
B.H.P.-5'5
at 1,800
R.P.M.
Valves.-Type,
Mushroom.
Position,
side
valve'
Tappet
clearances:
EXHAUST
'020';
INLET '010''
Timing:EXHAUSTOPtrNS48'beforebottomdeadcentre;
-
CLOSES
9"
after
toP
dead
centre'
INLET
OPENS
l7o
before
top
dead
centre;
CLOSES
52'
after
bottom
dead
centre'
Camshaft.-Type,
cast
in
one
piece,
driven
by
spur
gear'
Piston.-Material,
low
expansion
alloy.
Number
of
rings,
4' Gudgeon
pin
fixing,
circliPs.
Connectln§
Rod.-Material,
steel'
Type
of
big
end
bearing'
white
metal,
steel
backed.
Crankshaft.-Number
of bearings,
2.
Type,
taper
roller'
Carburetter.--Make,
Zenith.
Type
24
T-2'
Ignttlon.-I\fagneto.
Make,
Wico.
Type,
CJ'
936'
Timing'
20'before
top dead
centre.
Drive,
direct
coupled'
Sparking
plug'
size
14
millimetres.
GaP,
'025' LODGE-CN'
Lubricatlon
System.-J.A.P.
dipper'
Sump
capacity,
3
pints'
Fuel
Tank
CaPacitY.-l
gallon.
Fuel
Consumptlon.-'9
pints
per B-H'P'
hour'
Wel§ht.-l72
lbs.
(88 Kilogrammes)'
RECONDITIONING
DIMENSIONS
Cylinder
Bore.-Diameter,
3'3955'
or 3'4155"
Overslze
Plstons
Available.-+
'020"
and
f
'040"'
Underslze
Bearings
Available.-Connecting
rod,
1'3655'
to
1'3555''
RECOMMENDED
CLEARANCES
ON
RECONDITIONING
Clearances.-Crankshaft
and
connecting
rod,
big
end,
'001'
to
'003"
Sideclearances,connectingrodandcra.rrkshaft,.004"to.009,.
Gudgeon
pin and
"or.r""iing
rod,
small
end,
'0005'
to
'0015"
Gudgeon
pin and
piston,
'0002'
to
'0009''
Piston.-On
diameter
oI
piston
:
'006"
skirt,
'0185"
top
land'
B.etween
piston rings
and
grooru=,
'0035'
to
'0055"
Between
scraper
ring
and
groove,'0015'
to'0035'.
P.n-cr 7

J.A.P 6 Specifications

General

Brand	J.A.P
Model	6
Category	Engine
Language	English