Saton S-650G Operating instructions

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SATOH
TRACTOR
f
Ls-65()G
REnAIR
MANML
SATOH AGRICUTTURAL MACHINE
7
Publication No. 03
MFG. CO*LTD,

CO}ITENTS
ENGiINE SYSTEM ...-....."""""""""'t"r"""""""""""'t""""..""" A
CLUTCH SYSTEM //../..I{.|EE..L, r . ..' r, r r, . . r.,
/'..r(.hEE..k rr...rrrrrrr..r.r..rt!r. B
STEERI ilG LI I{KAGE SYSTEII
TRANsMlssl0il sysTE |l .#6rn. A..... KEo.* fr.i.r{s.......... ll
BRAKE SYSTEM...r..r.......r.........r...........................r..................rrr. E
ELECTRI0AL SYSTEM r e. r .,frn6.
DRAFT CoNTRoL.....,...........................r................................r....... H
p0UuER ASSISTED STEERIJ{G...................................................... I

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SATOH TruTOR
ENGINE SYSTEM
. PUBLICATI0il JIo.03-A
MoDEL s.65()(G
REPAIR MANUAL
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CONTENTS
THE ENGINE . GENERAL
1. Cylinder Head
2. Cylinder Block
3. Pistons and Crankshaft
4. Valve Mechanism
5. lntake and Exhaust Mechanism
6. Governor
7. Cooling System
8. Lubricating Mechanism
9. Elestrical SYstem
ETUGINE
Disassembling Order
1-1 . Removing the Engine . .
1-2. Disasembling the Engine
Checking Maintenance and Limit of Adiustment
2-1 . Cylinder Head . .
2-2. Piston and Cylinder Block
2-3. Connecting Rod
24. Crankslraft and Main Bearing Metal
2-5. Camshaft . .
2-6. Timing Chain Sprocket and Chain Adiuster
AssemblingOrder .. ..
3-1 . Assembling the Engine
3-2. Mounting the Engine
Spgcifications .. ..........
LUBRICATIOT{SYSTEM ....
1. Lubrication System - General
2. Disassembling the Oil Pump . . . .
2-1 . Removing the Oil Pump
2-2. Disasembling the Oil Pump
3. Checking, Maintenance and Limit of Adiustment
3-1 . Checking and Adjusting the Oil Pump
3-2. Oil Filter Replacement
3-3. Checking and Adjusting the Oil Pump Driven Gear Shaft
34. Adjusting the End Play of Oil Pump Driven Gear Shaft
4 tT'I?"ruili,ff': : :
1.
2.
3.
4.
3
3
3
7
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25
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27
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5, Specif ications
51. Oil Pump Specifications
5-2. Oil F ilter Specif ications
SYSTEM ....
Cooling System - General - .
Disasembling Order . .
2-1 . Removing the Water PumP
2-2. Disassembling the Water PumP
Checking Maintenance ?nd Limit of Adiustment
31 . lnspection of Water PumP . .
3l2. Checking the Thermostat
AssemblingtheWaterPumP .... ..
Mounting thg Water Pump . . . . . . . . . .
lrstalling the Thermostat . . . . . . . . . .
Specifications .. ..
7-1 . WaterPump r. . . . . . . . . . . . .
7-2. ThgrmosEt.. ,o....o.
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COOLING
1.
2.
3.
*4.
5.
6.
7.
FUEL SYSTEM
Fuel System - .Generct
AirCleaner o o . . .
2-1 . Rennving the Air Cleaner Element
2-2. Checking the Air Cleaner . . . .
2-3. Air Cleaner Specifications . .
Fugl Pump...,.....
31 " Removing the Fuel Pump . .
3-2. Disasembling the Fuel Pump . .
3-3. Checking the Fuel Pump
34. Assembling the Fuel Pump . .
35. lnsUlling the Fuel Pump
36. Fuel Pump Specifications . . . .
4. Fugl Filtgr . . . . . . ... . , . . . .
5. Carburetor .. ..
51 . C"onstruction . .
5-2. Disassembling the Carburetor
$3. Checking, Maintenance and Limit of
5.4. Assembling the Carburetor . .
t5. MountingtheCarburetor .... .
$6. Specif ications . .
1.
2.
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4
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50
54
55
55
55
I_
gOiustment

6. Governor
6-1. Governor System - General
6-2. Governor - Operation and Construction
6-3. Purpose of Governor Adjustments
&4. Maintenance
6-5. lnterlock Adjustment between C;rburetor
Spark Plug
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and Governor
IGTTIITION SYSTEM
1. Spark Plug
1 -1 . lnspection and Adjustment of
1-2. Spark Plug Specifiiitions
Distributor
2-1 . Removing the Distributor
2-2. Disasembling the Distributor
2-3. Checking, Maintenanc€ and Limit of Adjustment
24. Asembling the Distributor
2-5. Mounting the Distributor
2-6. lgnition Timing lnspection and Adiustment
2-7 . Distributor Specifications
TOURBLESHOOTI]UG
1. The Ergine Lacks Power . .
1 -1 . Fuel C.omprssion is lnsuff icient
1-2. lgnition Timing is lncorrect
1-3. Fuel Lsrel is Low
14. Carburetor Dravw lnsufficient Amount of Air
1-5. Engine Overheats . . . .
2. Fuel Canzumption is Excessive
2-1 . Engine Oil Leaks
2-2. Oil Comes Up into the Combustion Chamber
2-3. Oil Comes Down from Valve System
Engine is Hard to Surt
3-1. Engine has Starting Difficulty : .
3-2. lgnition System is Defective
3-3. Engine
34. Carburetor
Engine is Noisy
4-1 . Piston
+2. Crankshaft
+3. ConnectingRod .... ....
U. tMiscellaneous
3.
4.
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6.
5. F iring lrregularities
S1. lgnition System
*2. Air-fuel Mixture
$3. Valves . .
u. cylinderHead .. ....
lncorrest ldle Speed Adiustment . .
Gl . Carburgtor . . . . . . . .
G2. AirEnteringFuel Line .... ....
6-3.Va1vgs...........o....
il. Cylindgr Head . . . . . . . . . . . .
Engine Runs not Smoothly (when acceleratedl . . . .
7-1 . Carburgtor . o . . . . . . . . . . . . . . . .
7-2. lgnitionSystgm .. ...... ...
7 3" Ergine, . . . . . . . . . . . . . . . . . . . . . . . . .
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7.

THE ENGINE - GENERAL
TllE ENGINE-GENERAL
This PB engine is a high performance, water-cooled, 4-cylinder, in-line gasoline engine, employing the overhead valve and high
cam shaft system. The cylinder bore and the piston stroke measure 2'6772 in' (68 mm) and 2'6772 in' (68 mm)'
respectively. ln this sense, the cylinder is o{ a square type, having a total displacement of 60.2 cu. in' (987 cc) and a
compr.ession ratio of 8.6 to l. The maximum output is 25 PS at 2,800 r.p.m. and the maximum torque 46'9 lt-lbl2,2$O
r.p.m. (6.5 kg-m/2,2OO r.p.m.). The description of the engine is as follows:

t
1. Cylinder Head
Being made of a light alloy, the cylinder head is light
in weight, provid ing excellent rad iation eff iciency.
The domeshaped combustion chamber is shrinkage-
fitted with ductile cast iron valve seats. The intake
and the exhaust valves are arranged opposite to each
other the cylinder head; that is, the cros-flow design
is employed for better combustion eff iciency.
2. Cylinder Block
The cylinder block is precisioncast from a light alloy
meEl by means of pressure die casting. To support
the crankshaft, f ive bearings of the deep skirt type are
employed. The cylinder liners are made of special
cast iron and replaceable. They are directly cooled
by water and sealed with two "4" rings.
3. Pistons and Crankshaft
The pistons are of a conical ellipse type manufacturd
by LO-EX. The crankslraft is made of ductile cast
iron supsior in durability and wear-resistance, and
supported by five main bearings. The main bearings
are made of an aluminum alloyed with tin, which is
also excellent in durability and wear-resistance.
4. UalYe Meclnnism
The high cam shaft design is employed, along with
five special iron bearings, for increased rigidity. This
permits high speed relolutions. The cam shaft is
driven by a Renold-made chain, wtrose tension is
adjustable by means of the chain. adjuster and
vibration dampr. To reduce the cfrain noise, the
contacting surfaces of the chain is finished with
heat-proof and wear-proof rubber.
5. lntake and Exhaust Mechanism
The exhaust manifold is made of cast iron, and the
intake manifold made of a light alloy metal. Both
manifolds ?re of independent branch Wpe. The hot
spot is heated by warmed "cooling water". ln the
intake system, a Stronberg type carburetor, having a
downdraft double-venturi is used.
6. GoYernor
The Governor is of f ly weight type and controlled by
means of all speed governor system.
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8. Lubricating Mechanism
Total pressure lubrication is carried out by a trochoid
gpar oil -pump, which is driven by the cam shaft drive
gear. A cartridge type oil f ilter is employed.
9. Electrical System
Electrical component is of 12-volt capacity. The
alternator is l Samp. capacity, and the starter of
1.O-kW. As the battery, the N40L Wpe is used, and
the distributor is provided with a vacuum and
centrif ugal type automatical advancer.
7. Cooling System
Cooling system is the type of forcedcirculation, and
the pressure in the radiator is 9.954 lbs/sq. in. by
which the high efficiency of heat radiation is secur-
ed. Their qystem is incorporated with the Wax type
thermostat and the water pump is of the centrifugal
type. The miterial of cooling fan is the synthetic
resin, consisting of 4 wings,

ENGINE
ENGINE
1. Disassembling 0rder
Note: Notes on Engine Dirssembly
Both engine and transmission are very heavy in weight. ln addition, they must be kept in a horizontal
position while being disassembled, and therefore, engine disassembly operations should be performed
on solid f loors.
To keep the tractor in a horizontal position, place a wooden wedge between the front extension and
the axle beam.
Be sure that necessary wrenche, such as a special tool (No. N033S SOCKET WRENCH SET), special
tool (No. BT-100 DOUBLE OFFSET BOX WRENCH SET), and (No. BT-9 OPEN-END WRENCH
SET), and other special tools including a chain block are all available on hand.
Put a rnark on each engine component part such as a piston. piston ring, valve, valrre spring, metal,
tappet, push rod. etc. in order of the cylinders, so that you will not corifuse dbout parts.
Take special care not to datnage the removed parts, and put them in order.
l-1 . Remoying the Engine
1. Bemove the negative (-) corde from the battery.
2. Remove the wires from the alternator (A) , starting
motor (B) and hed light (cl.
c
o
o
o
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b
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Fig. I
Remove the bonnet.
Disconnect the wires from the oil pressure switch
(A) and the water heat gauge (B) .
Fig. 2
5. Removing the radiator
Throughly drain off the cooling water from the
radiator and cylinder block. Loose the water hose
clip (A) and pull out the water hose from the
radiator. Remove the radiator mounting bolts (B) ,
(C), and fitting nut for radiator support (D), and
remove the radiator.
3.
4.
Fig. 3