Ho rarolla bothata bo butle ba Komatsu PC60-8 excavator, tharollo ea mathata e lokela ho etsoa ka mokhoa o hlophisitsoeng ho latela mohopolo oa “Quick Pre-spection → Engine → Pilot/Hydraulic Main System → PC-EPC Solenoid Valve/Pump Control → Valve ea Phatlalatso/Leqhubu la Thuso/ECU” Circuit. Sebaka sa phoso se lokela ho khethoa ka ho kopanya litekanyo tsa 'nete tsa khatello, hona joale, le phallo ea data. Ka tlase ke mehato e qaqileng, e ka etsoang le litekanyetso tse tloaelehileng.
- Tšireletseho le Tlhahlobo e Potlakileng (Felisa Mathata a Motheo ho 5 Motsotsos)
Litlhaloso tsa Tšireletso
Emisa enjene → Hlakola khatello sepotolohong se seholo/mokhanni oa sefofane → Hakolla accumulator → Sebelisa Lockout-tagout ho thibela ho qala ka phoso nakong ea tlhokomelo.
Tlhahlobo ea Motheo
Mokhoa le Ts'ebetso: Netefatsa hore moepi o maemong a matla a P kapa H a nang le throttle e behiloeng ho ea holimo, e laolang litlhophiso tse fosahetseng joalo ka mokhoa oa moruo kapa moeli oa lebelo o sa sebetseng.
Oli ea Hydraulic: Netefatsa hore boemo ba oli bo bohareng ba dipstick, mocheso oa oli o pakeng tsa 45-55 ℃ (preheat enjene e batang pele), oli e hlakile ntle le foam kapa likaroloana tsa tšepe, 'me ha ho na alamo e koalang mochini. Haeba boemo leha e le bofe bo sa finyelloe, tlosa oli le sefa pele.
Ho Lutla le Lihokelo: Hlahloba ho lutla ha kantle pompong e kholo, valve e kholo, lipeipi tsa oli le manonyeletso. Liboutu tse hlephileng kapa li-clamp li ka baka tahlehelo ea khatello.
Wiring Harness and Connectors: Netefatsa hore lihokelo tsa ECU, PC-EPC solenoid valve, speed sensor, joalo-joalo, ha li na ho lokoloha, ho kenella ha metsi, le oxidation, le hore li-terminals li koaletsoe hantle.
- Tlhahlobo ea Lehlakore la Enjine (Felisa Mathata a Mohloli oa Matla)
| Ntho ea Tlhahlobo | Boleng bo Tloaelehileng | Mokhoa oa ho Hlahloba | Ts'ebetso ea Phoso le Ts'ebetso |
| Lebelo Lebelo | 2200±50rpm (boholo ba throttle) | Bala ka tachometer kapa sesebelisoa sa tlhahlobo | Lebelo le sa lekaneng → Lekola molamu/motoropo, khatello ea mafura, liente tsa mafura, 'me u lokise molumo oa motlakase oa EFC |
| Khatello ea Mafura | Khatello e tloaelehileng ea terene ≥30MPa (lebelo le sa sebetseng) / ≥140MPa (moroalo o boima) | Lekanya pheletsong ea terene e tloaelehileng ka tekanyo ea khatello | Khatello e tlase → Bea sebaka sa sefa, hlahloba li-nozzles tsa mafura, 'me u lekanye pompo ea ente ea mafura |
| Ho tsitsa ha lebelo | Ho feto-fetoha ha meroalo ≤50rpm | Bala phallo ea data ka sesebelisoa sa tlhahlobo | Ho feto-fetoha ho hoholo → Lekola sensor ea lebelo, ho lutla ha sistimi ea mafura, le mohopolo oa taolo oa ECU |
| Matla a Matching | Ha ho enjene e emang / ho theoha ka lebelo (ka hare ho ± 50rpm) | Sheba lebelo nakong ea ts'ebetso e kopaneng | Ho ema ha enjine → Lekola matla a tšoanang pakeng tsa pompo ea mantlha le enjene, 'me u lekanye valafo ea solenoid ea PC-EPC |
- Tlhahlobo ea Pilot System (Khatello ea Pilot e sa Lekaneng ke Sesosa se Khafetsang sa lebelo le butle la mochini)
Sebaka sa Tekanyo ea Khatello: Sebaka sa pompo ea sefofane kapa boema-kepe ba teko ea khatello ea sefofane sa valve e kholo.
Boleng bo Tloaelehileng: 3.3±0.2MPa (33±2kgf/cm²) ka bobeli lebelo le sa sebetseng le lebelo le phahameng haholo.
Mehato ea Ts'ebetso
Lekanya khatello ha mochini o sa sebetse ntle le ts'ebetso. Haeba khatello e le tlase ho 3.1MPa, fetola valve ea ho fokotsa khatello ea lifofane ( tiisa linate ka ho toba ho eketsa khatello, 1/4 fetola nako le nako).
Haeba khatello e sa khone ho lokisoa kapa e feto-fetoha haholo → Hlakola valve e fokotsang khatello, hlahloba hore na ho na le jamming ea mantlha ea li-valve, ho roala ha poppet le mokhathala oa selemo, ebe u hloekisa kapa u nke sebaka sa kopano.
Haeba khatello e lula e sa fetohe ha lever ea taolo e sebetsa → Hlahloba ho thibela potoloho ea oli ea sefofane kapa ho lutla ka hare ho valve ea lever ea taolo, ebe u hlahloba hape ka mor'a ho lokisoa.
- Hydraulic Main System Khatello le Tlhahlobo ea Phallo (Core Performance Layer)
Khatello e ka Sehloohong ea Pompe (E Behiloe ke Valve e ka Sehloohong ea Thuso)
Sebaka sa Tekanyo ea Khatello: Likou tsa tlhahlobo tsa P1 / P2 tsa pompo e kholo; teko ka throttle e phahameng ka ho fetisisa ka khatello e hahiloeng ho imoloha (mohlala, ka ho tšoara molamu oa bakete sebakeng se khutliselitsoeng).
Boleng bo Tloaelehileng: 34.3±0.5MPa (343±5kgf/cm²).
Ho sebetsana ka mokhoa o sa tloaelehang: Khatello e tlase → Harola belofo e ka sehloohong ea ho thusa, hlahloba hore na ha ho na valve core jamming/wear and seal seal, ebe u hloekisa kapa u nke sebaka; Haeba khatello e tloaelehile empa mochine o ntse o lieha → Hlahloba phallo ea pompo e kholo le taolo ea PC-EPC.
Phallo e ka Sehloohong ea Pompo (E Fetotsoe ke PC-EPC Solenoid Valve le PC Valve)
Standard Logic: PC-EPC khatello ea tlhahiso ke 3.5-4.5MPa ha u idling ntle le ts'ebetso; khatello e theohela ho zero 'me hona joale ke 160-260mA ka throttle e phahameng ntle le ts'ebetso.
Mokhoa oa ho Hlahloba:
Bala hona joale PC-EPC ka sesebelisoa sa ho hlahloba: 850-1000mA ka lebelo le sa sebetseng, 160-260mA ka throttle e phahameng. Haeba e sa tloaeleha, hlahloba valve ea solenoid le ECU.
Lekanya khatello ea tlhahiso ea PC-EPC: Khatello e lokela ho lumellana le ea hona joale. Haeba khatello e sa tloaeleha → Harola 'me u hlahlobe valve ea solenoid bakeng sa ho ts'oaroa ha li-valve kapa ho khathala ha likhoele, ebe u e hloekisa kapa u e khutlise.
Phallo Calibration: Lekanya tlhahiso ea pompo e kholo ka meter ea phallo. Tekanyo e tloaelehileng ea phallo e ka bang 120L/min (pompo ea mafahla). Haeba phallo e le tlase → Lekola hore na ho na le tšitiso e feto-fetohang le ho lutla ha potoloho ea maikutlo a LS.
- Tlhahlobo e Tebileng ea PC-EPC Solenoid Valve le Pump Control System (Electronic Control Core)
PC-EPC Solenoid Valve (Karolo ea Bohlokoa bakeng sa ho Laola Phallo e ka Sehloohong ea Pompe)
Tekanyo ea Resistance Ntle le Matla: Ho hanyetsa li-coil ke 10-15Ω. Tlosa valve haeba potoloho e bulehileng kapa potoloho e khutšoanyane e fumanoa.
Teko ea Matla: Khatello e hlahisoang ke 3.5-4.5MPa ha u idling ntle le ts'ebetso; khatello e theohela ho zero ka bongata bo boholo ntle le ts'ebetso. Haeba ho se joalo, konokono ea li-valve e koetsoe / e tsofetse 'me e hloka ho hloekisoa kapa ho nkeloa sebaka.
Teko ea Mosebetsi: Tlosa sehokelo sa PC-EPC. Haeba ho se na phetoho ts'ebetsong → valve ea solenoid e fosahetse 'me e tlameha ho nkeloa sebaka.
Mokhoa o ka Sehloohong oa Phapang ea Pompo (Valve ea PC/LS Valve)
Lekola konokono ea valve ea PC bakeng sa ho jamming / ho roala 'me u netefatse hore selemo se na le elasticity e tloaelehileng; ho seng joalo, phallo e ke ke ea lokisoa hantle.
Bakeng sa valve ea LS bypass: Hlahloba hore na reng ea ho tiisa ha e senyehe le hore mokokotlo oa valve o koala ka thata ho thibela ho lutla ha khatello ea LS e ka bakang ho hlōleha ho laola phallo.
- Tlhahlobo ea Valve ea Phatlalatso le Sehlopha sa Thuso sa Li-Valve (Felisa ho Lutla ka Hare / Ho Laolla)
Main Valve Core: Arola 'me u hlahlobe li-boom / backet rod / swing valve cores bakeng sa ho jamming / scuffing; etsa bonnete ba hore tumello ke ≤0.05mm. Sila kapa u nke sebaka sa mantlha sa valve ha ho hlokahala.
Ho laolla Valve: Etsa bonnete ba hore mokokotlo oa valve o koala ka thata 'me selikalikoe sa ho tiisa ha sea senyeha ho thibela oli e kholo hore e se ke ea phalla ka ho toba ka tanka, e leng se ka bakang ho hlōleha ha khatello.
LS Bypass Valve: Lekanya khatello ea LS (≥2MPa nakong ea ts'ebetso). Haeba khatello e le tlase → Hlahloba valve hore na ha e lutle 'me u nkele reng e koalang kapa konokono ea valve.
Khatello ea ho Fokotsa Valve / Hlahloba Valve: Hlahloba valve ea ho fokotsa khatello le ho hlahloba valve holim'a valve e kholo ho netefatsa khatello e tsitsitseng mme ha ho na ho tsoa ka hare.
- Tlhahlobo ea Potoloho le ECU (Felisa Lintho Tse sa Tloaelehang tsa Letšoao la Taolo ea Elektronike)
Fault Code Reading: Bala likhoutu tsa FM/IMM ka sesebelisoa sa tlhahlobo, u tsepamisitse maikutlo ho P0216 (ente ea mafura), P0193 (khatello ea mafura), le liphoso tse amanang le PC-EPC, ebe u rarolla mathata ho latela likhoutu.
ECU Pin le Puisano:
Phepelo ea Motlakase / Phatlalatso: Motlakase oa kamehla oa ECU ke 24V, motlakase oa senotlolo ke 24V, 'me ho hanyetsa fatše ke <1Ω. Haeba e sa tloaeleha, hlahloba li-fuse, li-relay le likhoele tsa likhoele.
CAN Bus: CAN-H voltage ke 2.5-3.5V, CAN-L voltage ke 1.5-2.5V. Haeba motlakase o sa tloaeleha, sheba hore na ho na le li-short circuit tsa bese, open circuit, kapa li-terminal resistor.
Sensor Calibration: Etsa bonnete ba hore matšoao ho tloha lebelo, khatello (P1 / P2 / pilot), le lisebelisoa tsa mocheso li ka har'a mefuta e tloaelehileng. Ntlafatsa kapa u fetole li-sensor haeba phapang e le kholo.
- Sebaka se Tloaelehileng sa Phoso le Ts'ebetso (Li behiloe ka Maqhubu)
| Phoso Phenomenon | Mabaka a Khafetsa | Ho Tšoara Tharollo |
| Lebelo la mochini o fokolang + khatello e tlase ea mofofisi | Khatello ea sefofane e fokotsang ho jama ha valve / mokhathala oa selemo | Hloekisa / fetola valve ea ho fokotsa khatello 'me u fetole khatello ho 3.3±0.2MPa |
| Lebelo le butle la mochini + khatello e sa tloaelehang ea PC-EPC | Solenoid valve jamming / tšenyo ea coil | Hloekisa konokono ea valve kapa u nke sebaka sa valve ea solenoid, 'me u lekanye khatello ea hona joale / khatello |
| Lebelo la mochini o fokolang + khatello ea mantlha e tlase | Ho lutla ha ka hare ha valve e kholo ea liphallelo / valve ea ho theola | Harola, hloekisa / fetola valve, 'me u khutlisetse khatello ho 34.3MPa |
| Lebelo la mochini o liehang + + enjene e ema | Phapang pakeng tsa phallo ea pompo ea mantlha le matla a enjene | Lekola PC-EPC 'me u hlahlobe sistimi ea mafura ho tsamaisana le curve ea matla |
| Lebelo la mochini o liehang ha ho chesa (ho tloaelehile ha ho bata) | Ho senyeha ha oli ea Hydraulic / ho koala sefahla | Kenya sebaka sa oli le filthara, 'me u hloekise potoloho ea oli |
- Lisebelisoa tsa ho Hlahloba le Litlhokomelo
Lisebelisoa tsa Bohlokoa
Pilot / main pressure test gauge (0-40MPa), tachometer, sesebelisoa sa ho hlahloba (mohlala, Komatsu IDSS), PC-EPC solenoid valve test wire, multimeter, flow meter.
Litlhokomelo
Sebelisa lihokelo tse tloaelehileng bakeng sa tekanyo ea khatello ho thibela ho lutla le kotsi ea motho; kokobetsa kgatello pele o qhaqholla ka mora tekanyo.
Lekola hape ka ho chesa ha enjene ka mor'a litokiso tsohle kapa ho nchafatsoa ho netefatsa hore e sebetsa hantle tlas'a maemo a tloaelehileng a ts'ebetso.
Etelletsa pele ho sebelisa likarolo tsa pele tsa lisebelisoa; Li-valve tsa aftermarket solenoid li ka 'na tsa se na kutloisiso e lekaneng.
- Kakaretso ea Ts'ebetso ea Ts'ebetso (E behiloe ka Bohlokoa)
Tlhahlobo e potlakileng → Tlosa mokhoa, boemo ba oli, ho lutla le mathata a likhoele.
Enjine → Lekanya lebelo, khatello ea mafura, le ho bapisa matla.
Sistimi ea sefofane → Lekanya khatello → Fetola/hloekisa valve e fokotsang khatello.
Sistimi e kholo → Lekanya khatello e kholo → Lekola valluu ea mantlha ea ho thusa/e theosang.
PC-EPC → Lekanya hona joale/khatello → Hloekisa/buela sebaka sa valve ea solenoid.
Sephahla se seholo sa pompo/kabo → Lekola mochini o feto-fetohang, ho thiba ha li-valve, le ho lutla ka hare.
Potoloho/ECU → Bala likhoutu tse nang le liphoso → Hlahloba li-pin, puisano le lisensara.
