38
3) Cylinder
block
Inspection and service
(1) Check for crack, damage and distortion on the top of
the block in the same way as in the cylinder head.
(2) Measurement of cylinder bore
➀
There should be no scratch, rust, corrosion, etc. on
the cylinder bore when checked visually.
➁
Measure the cylinder bore at the top, center and
bottom respectively in the crankshaft direction (A)
and the direction at right angle to it (B). If the repair
value is exceeded, finish to an oversize by boring.
➂
The above-described bore top corresponding to the
top ring position at the piston TDC about
10 mm
below the cylinder block top surface, and the
bottom corresponds to the oil ring position at the
BDC about
100 mm
below the cylinder block top
surface.
➃
Use a cylinder gauge (inside dial gauge) for the
measurement. Apply the gauge correctly at right
angle to the bore wall surface.
➄
Cylinder honing shall be conducted by boring
according to the following specifications. Horning
specifications (2-step honing according to Dia
specifications)
●
Grinding
stone:
Rough finishing:
Tokyo Dia SD120/140
N100M (bronze type)
Finishing:
GC600JB
●
Grinding stone size: 100L × 4W
●
Speed:
162
rpm
●
Axial feeding speed: 13 m/min
●
Gauge
pressure:
Rough
finishing:
15kgf/cm
2
Finishing:
5
kgf/cm
2
●
Finishing
stroke: 9
●
Honing allowance: 0.04 mm (diameter)
●
Cross hatch overall angle:
40°
●
Surface roughness: 2 – 4 µ
Distortion on cylinder block top surface (mm)
Standard assembling value
Repair value
Less than 0.05
More than 0.12
T119
(Unit: mm)
Model
Standard assembling
value
Repair value
S753
∅
75 -
∅
75.019
∅
75.2
S773
·
S773L
∅
77 -
∅
77.019
∅
77.2
Standard
assembling value
Repair value
∅
75.5 –
∅
75.519
∅
75.7
∅
77.5 –
∅
77.519
More than
∅
77.7
Standard
assembling value
Repair
value
∅
76 -
∅
76.019
More than
∅
76.2
1st boring
0.5
1st boring
0.5
2nd boring
0.5
Replace the block.
Содержание ST318
Страница 1: ......
Страница 4: ...3 Chapter 1 GENERAL...
Страница 27: ...26...
Страница 28: ...27 Chapter 2 ENGINE Tractor Model Engine Model ST318 S753 ST321 S773 ST324 S773L...
Страница 29: ...28 2 1 Engine Sectional View T100 T101...
Страница 48: ...47 13 Oil flow T140...
Страница 98: ...97 Chapter 3 TRACTOR MAIN BODY...
Страница 115: ...114 3 3 Transmission 1 9 3 MANUAL TRANSMISSION 1 Sectional view z Without Mid PTO T447 z With Mid PTO T447...
Страница 132: ...131 2 HYDROSTATIC TRANSMISSION 1 SPEED PTO MID PTO 1 Sectional view T505 T506...
Страница 154: ...153 Take out the swash plate from the case T566...
Страница 163: ...162 2 Range shift change lever Rear PTO change lever Mid PTO change lever and 4WD change lever T588...
Страница 194: ...193 Model 9 3 shown...
Страница 199: ...198 4 CONTROL VALVE 1 Control valve relief valve 340013400 1 Name of components T658...
Страница 203: ...202 2 Control valve for lifting lowering implement 340016110 1 Name of components T667...
Страница 223: ...221...
Страница 224: ...222...
Страница 225: ...223...
Страница 226: ...224...
Страница 228: ...226 4 LIGHTEING CIRCUIT T702...
Страница 229: ...227 5 HORN CIRCUIT T703...
Страница 230: ...228 6 FUEL LEVEL CIRCUIT T704...
Страница 231: ...229 7 ENGINE STOP SOLENOID CIRCUIT T705...
Страница 232: ...230 8 ENGINE COOLANT TEMPERATURE CIRCUIT ENGINE OIL PRESSURE WARNING CIRCUIT T706...
Страница 233: ...231 9 HST CRUISE CONTROL CIRCUIT T707...
Страница 234: ...232 10 PARKING BRAKE WARNING LIGHT CIRCUIT T708...
Страница 235: ...233 11 BRAKE LAMP CIRCUIT T709...
Страница 236: ...234 12 SAFETY START CIRCUIT T710...
Страница 237: ...235 13 FLASHER AND HAZARD LUMP CIRCUIT T711...
Страница 238: ...236 14 GLOW PLUG AND GLOW LAMP CIRCUIT T712...
Страница 239: ...237 15 ALTERNATOR AND ENGINE STOP SOLENOID CIRCUIT T713...