205
➂
Lowering position
When the control lever is set at the lowering direction, the spool moves leftwards, the poppet is opened at the rear end
of the spool, and the oil in the hydraulic cylinder is pushed out to the transmission case.
At this time, the implement lowering speed is adjusted by adjusting the flow rate by the flow control valve of the
hydraulic cylinder case head. (The implement does not lower when the valve is closed.)
On the other hand, the oil fed under pressure from the oil pump opens the unload valve as in the neutral position and is
returned to the transmission case.
1.
Pilot spool
6. Hydraulic pump
2.
Poppet; lowering valve
7. Valve; relief
3.
Valve; unload
8. Hydraulic cylinder
4.
Valve; check
9. Filter
5.
Valve; flow control
10. Remote control valve
T670
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...