Kugadzirisa nyaya inononoka yekuchera yeKomatsu PC60-8, kugadzirisa dambudziko kunofanirwa kuitwa zvine mutsindo zvichiteera pfungwa ye “Kurumidza Kuongorora-Kurumidza → Injini → Pilot/Hydraulic Main System → PC-EPC Solenoid Valve/Pombi Kudzora → Distribution Valve/Relief Valve/ECUrth Cir. Nzvimbo yekukanganisa inofanirwa kutariswa nekubatanidza zviyero chaizvo zvekumanikidza, ikozvino, uye kuyerera kwedata. Pazasi pane akadzama, matanho anogoneka uye akajairwa maitiro.
- Chengetedzo uye Kurumidza Pre-kuongorora (Bvisa Basic Issues mu5 Minutes)
Sayenzi Yekuchengetedza
Misa injini → Sunungura kudzvinyirirwa mudunhu guru/mutyairi wedunhu → Bvisa iyo accumulator → Isa yekukiya-tagout kudzivirira kutanga netsaona panguva yekugadzirisa.
Basic Inspection
Mamiriro uye Mashandiro: Simbisa iyo yekuchera iri muP kana H simba modhi ine throttle yakaiswa kusvika pakakwirira, kutonga kunze zvisiri izvo senge hupfumi modhi kana idle kumhanya muganho.
Hydraulic Oiri: Ita shuwa kuti huwandu hwemafuta huri pakati pe dipstick, tembiricha yemafuta iri pakati pe45-55 ℃ (preheat injini inotonhora kutanga), oiri inojeka isina furo kana simbi zvidimbu, uye hapana sefa inovhara alarm. Kana chero mamiriro asina kusangana, tsiva mafuta uye sefa kutanga.
Kudonhedza uye Kubatanidza: Tarisa uone kubuda kwekunze mupombi huru, vharafu huru, pombi dzemafuta, uye majoini. Mabhaudhi akasununguka kana mabhaudhi anogona kukonzera kurasikirwa kwekumanikidza.
Wiring Harness uye Connectors: Iva nechokwadi chokuti zvibatanidza zveECU, PC-EPC solenoid valve, speed sensor, nezvimwewo, hazvina kusununguka, kupindira kwemvura, uye oxidation, uye kuti materminal akanyatsogadziriswa.
- Engine Side Inspection (Bvisa Simba Source Issues)
| Inspection Item | Standard Value | Inspection Method | Kukanganisa Kuita uye Kubata |
| Rated Speed | 2200±50rpm (yakanyanya throttle) | Verenga ne tachometer kana diagnostic tool | Kumhanya kusina kukwana → Ongorora throttle dhonza tsvimbo/motor, pressure yefuel, majekiseni emafuta, uye gadzirisa EFC throttle yemagetsi |
| Fuel Pressure | Yakajairika njanji kumanikidza ≥30MPa (isiyo kumhanya) / ≥140MPa (inorema mutoro) | Eresa panoperera njanji nechiyereso chekumanikidza | Kudzikira kudzvanya → Tsiva chinhu chesefa, ongorora miromo yemafuta, uye gadzirisa pombi jekiseni remafuta |
| Speed Sability | Load fluctuation ≤50rpm | Verenga kuyerera kwedata uchishandisa diagnostic tool | Kuchinja kukuru → Tarisa iyo yekumhanyisa sensor, mafuta system kuvuza, uye ECU yekudzora mantiki |
| Power Matching | Hapana injini inomira / kumhanya kudonha (mukati ± 50rpm) | Tarisa kumhanya panguva yekushanda kwekomboni | Injini inomira → Tarisa simba rinoenderana pakati pepombi huru neinjini, uye gadzirisa PC-EPC solenoid valve. |
- Pilot System Inspection (Isina kukwana Pilot Pressure ndiyo Inowanzokonzeresa Inononoka Muchina Yekumhanya)
Pressure Measurement Point: Pilot pombi yekubuda kana pilot pressure test port yevhavha huru.
Standard Value: 3.3±0.2MPa (33±2kgf/cm²) pane ese ari maviri kumhanya asina kuita uye yakanyanya throttle.
Operation Matanho
Kuyera kudzvanywa kana muchina uchingomira pasina kana oparesheni. Kana dzvinyiriro yakaderera kupfuura 3.1MPa, gadzirisa mutyairi wekudzikisa vheji (simbisa nati newachi kuti uwedzere kudzvanywa, 1/4 tendeuka nguva imwe neimwe).
Kana dzvinyiriro isingagone kugadziridzwa kana kuchinjika zvakanyanya → Disassemble the pressure reducer valve, tarisa valve core jamming, poppet wear, uye spring kuneta, wobva wachenesa kana kutsiva gungano revharuvhu.
Kana dzvinyiriro ikaramba isina kuchinjika kana dhizaini yekudzora ichishandiswa → Ongorora kuvharika kwemafuta emutyairi wedunhu kana kubuda kwemukati kwevhavhavha yekudzora, wozodzokorora mushure mekugadzirisa.
- Hydraulic Main System Pressure uye Kuyerera Kuongorora (Core Performance Layer)
Main Pump Pressure (Yakaiswa neMain Relief Valve)
Pressure Measurement Point: P1/P2 outlet test ports yepombi huru; bvunzo pahupamhi hwemhepo nekumanikidza kwakavakirwa kusvika pakuyamura (semuenzaniso, nekubata bhakiti tsvimbo munzvimbo yakadzoserwa).
Kukosha Kwenguva: 34.3±0.5MPa (343±5kgf/cm²).
Kubata Kusina Kujairika: Kudzvinyirira kwakaderera → Bvisa vharafu huru yekuyamura, tarisa kuti vharuvhu yakamira sei/kupfeka nekukuvadzwa kwechisimbiso, wozochenesa kana kutsiva vharuvhu; Kana kumanikidza kuri kwakajairika asi muchina uchiri kunonoka → Ongorora hombe pombi kuyerera uye PC-EPC kutonga.
Main Pump Flow (Yakagadziridzwa nePC-EPC Solenoid Valve uye PC Valve)
Standard Logic: PC-EPC inobuda kumanikidza ndeye 3.5-4.5MPa kana idling pasina kushanda; kudzvinyirira kunodonha kusvika zero uye ikozvino ndeye 160-260mA pahupamhi hwepamusoro pasina kushanda.
Nzira yekuongorora:
Verenga PC-EPC ikozvino ine diagnostic tool: 850-1000mA pakumhanya kusina basa, 160-260mA pahupamhi hwepamusoro. Kana zvisiri izvo, tarisa solenoid valve uye ECU.
Kuyera PC-EPC yekubuda kudzvanywa: Kudzvanywa kunofanirwa kuenderana neyazvino. Kana dzvinyiriro isina kujairika → Bvisa uye ongorora solenoid vharafu kuti vharafu yakamira sei kana kupera kwecoil, woichenesa kana kuitsiva.
Flow Calibration: Yema pombi huru inobuda neinoyerera mita. Chiyero chekuyerera chinenge 120L/min (mapatya pombi). Kana kuyerera kwakadzikira → Tarisa uone kuchinjika majamming uye LS mhinduro yedunhu kuvuza.
- Kuongorora kwakadzama kwePC-EPC Solenoid Valve uye Pump Control System (Electronic Control Core)
PC-EPC Solenoid Valve (Chikamu Chakakosha cheKudzora Main Pump Displacement)
Resistance Kuyera Pasina Simba: Coil kuramba ndeye 10-15Ω. Tsiva vharafu kana dunhu rakavhurika kana dunhu diki raonekwa.
Simba-paMuedzo: Kubuda kudzvanywa ndeye 3.5-4.5MPa kana idling pasina kushanda; pressure inodonha kusvika zero pahigh throttle pasina kushanda. Kana zvisiri, iyo yepakati yevhavha yakajairirwa / yakapfekwa uye inoda kucheneswa kana kutsiviwa.
Basa Rokuedzwa: Bvisa iyo PC-EPC yekubatanidza. Kana pasina shanduko mukushanda → Iyo solenoid valve ine mhosva uye inofanira kutsiviwa.
Main Pombi Variable Mechanism (PC Valve/LS Valve)
Ongorora iyo PC valve musimboti wejamming / kupfeka uye uone kuti chitubu chine yakajairika elasticity; kana zvisina kudaro, kuyerera hakugoni kugadziriswa zvakanaka.
YeLS bypass valve: Tarisa kuti mhete yekuisa chisimbiso haina kukuvara uye iyo yevhavha yepakati inovhara zvakasimba kudzivirira LS pressure leakage iyo inogona kukonzera kuyerera kutadza kutadza.
- Kuongororwa kweKugovera Valve uye Boka rekubatsira Valve (Bvisa mukati Leakage / Kuburutsa)
Main Valve Core: Disassemble uye ongorora boom / bucket rod / swing valve cores yejamming / scuffing; iva nechokwadi chekuti clearance iri ≤0.05mm. Geda kana kutsiva simbi yevharuvhu kana zvichidikanwa.
Kuburutsa Valve: Tarisa kuti simbi yevharuvhu inovhara zvakasimba uye mhete yekuisa chisimbiso haina kukuvara kudzivirira mafuta makuru kubva akananga kuyerera achidzokera kutangi, izvo zvinogona kukonzera kumanikidza kuvaka-up kukundikana.
LS Bypass Valve: Kuyera LS kudzvanywa (≥2MPa panguva yekushanda). Kana dzvinyiriro yakaderera → Ongorora vharuvhu kuti haina kubuda uye chinja mhete yekuvharisa kana core yevharuvhu.
Kudzvinyirira Kuderedza Valve / Chengetedza Valve: Ongorora kuvhara kwevhavha uye cheki valve pavhavha huru kuti uone kugadzikana kwakadzikama uye pasina kubuda kwemukati.
- Circuit uye ECU Inspection (Bvisa Electronic Control Signal Abnormalities)
Kukanganisa Kodhi Kuverenga: Verenga FM/IMM makodhi ane mudziyo wekuongorora, wakatarisana neP0216 (peturu jekiseni), P0193 (kumanikidza kwemafuta), uye kukanganisa kwakabatana nePC-EPC, wobva wagadzirisa zvinoenderana nemakodhi.
ECU Pin uye Kukurukurirana:
Power Supply/Ground: ECU inogara iine magetsi ndeye 24V, kiyi-pamagetsi ekupa ndeye 24V, uye pasi kuramba iri <1Ω. Kana zvisina kujairika, ongorora fuse, relay, uye tambo dzetambo.
CAN Bhazi: CAN-H voltage ndeye 2.5-3.5V, CAN-L voltage ndeye 1.5-2.5V. Kana voltage isina kujairika, tarisa kune bhazi pfupi dunhu, rakavhurika redunhu, kana terminal resistor nyaya.
Sensor Calibration: Ita shuwa masaini kubva kumhanya, kumanikidza (P1 / P2 / mutyairi), uye tembiricha sensors zviri mukati meyakajairwa renji. Calibrate kana kutsiva masensa kana kutsauka kwakakura.
- Yakajairika Mhosva Nzvimbo uye Kubata (Yakayerwa neFrequency)
| Fault Phenomenon | Kazhinji Zvikonzero | Kubata Solution |
| Inononoka muchina kumhanya + yakaderera pilot pressure | Pilot kumanikidza kuderedza vharafu jamming / kupera simba kwechirimo | Kuchenesa / kutsiva kudzvinyirira kudzikisa valve uye gadzirisa kumanikidza ku3.3± 0.2MPa |
| Inononoka muchina kumhanya + isina kujairika PC-EPC kudzvanywa | Solenoid valve jamming / coil kukuvara | Geza musimboti wevharuvhu kana kutsiva solenoid vharafu, uye gadzirisa ikozvino / kudzvanywa |
| Inononoka muchina kumhanya + yakaderera main pressure | Kudonha kwemukati kwevhavha huru yekuyamura / yekudzikisa vharafu | Disassemble, chenesa / tsiva vharafu, uye dzokorora kumanikidza ku34.3MPa |
| Inononoka muchina kumhanya + injini inomira | Kusiyana pakati pekuyerera kwepombi huru uye simba reinjini | Calibrate iyo PC-EPC uye ongorora iyo mafuta system kuti ienderane nemagetsi curve |
| Inononoka muchina kumhanya kana kuchipisa (zvakajairika kana kuchitonhora) | Hydraulic mafuta kuderera / kuvharika kwesefa | Tsiva mafuta uye sefa chinhu, uye chenesa dunhu remafuta |
- Kuongorora Zvishandiso uye Chengetedzo
Zvishandiso Zvinokosha
Pilot / main pressure test gauge (0-40MPa), tachometer, diagnostic tool (somuenzaniso, Komatsu IDSS), PC-EPC solenoid valve test wire, multimeter, kuyerera kwemamita.
Precautions
Shandisa zvakajairwa zvibatanidza zvekuyeresa kuyerwa kudzivirira kuvuza uye kukuvara kwemunhu; bvisa dzvinyiriro isati yasassembly mushure mekuyera.
Ongororazve neinjini inopisa mushure mekugadzirisa zvese kana kutsiva kuti uone kushanda pasi pemamiriro ekushanda.
Isa pamberi pekushandisa epakutanga masipire; aftermarket solenoid valves inogona kunge isina kukwana sensitivity.
- Inoshanda Operation process Summary (Yakayereswa Nekukosha)
Kurumidza kufanoongorora → Bvisa modhi, mwero wemafuta, kuvuza, uye nyaya dzewaya.
Injini → Kuyera kumhanya, kudzvanywa kwemafuta, uye magetsi anofananidzwa.
Pilot system → Mera kudzvanywa → Gadzirisa/chenesa vharuvhu yekudzikisa.
Huru system → Yera kudzvanywa kukuru → Ongorora vharafu huru yekuyamura/kuburutsa vharafu.
PC-EPC → Yera ikozvino/kudzvanywa → Kuchenesa/kutsiva solenoid vharafu.
Pombi huru/vharuvhu yekuparadzira → Ongorora machinjiro ekuchinja, kurovera kwevharuvhu, uye kubuda kwemukati.
Denderedzwa/ECU → Verenga makodhi ezvikanganiso → Ongorora mapini, kutaurirana, uye masensa.
