Honour Time Machinery Limited is a professional source manufacturer and exporter specializing in heavy equipment engine parts and hydraulic components. We offer factory direct pricing for global trade.
Specifically designed for Komatsu PC120-6 hydraulic systems ensuring 100% compatibility.
Direct replacement for part numbers 723-30-56100 and 7233056100.
Solves hydraulic system overheating, abnormal noise, and pressure instability.
High-precision machining for long-lasting durability in harsh construction environments.
Engineered as a high-quality domestic alternative to reduce maintenance costs.
| Attribute | Details |
|---|---|
| Model NO. | 723-30-56100, 7233056100 |
| Application | Komatsu Excavator PC120-6 Hydraulic System |
| Product Name | Unloader Valve / Pressure Control Valve |
| Condition | Brand New Replacement |
| Origin | China (Source Factory) |
| Production Capacity | 5000 PCS / Year |
| Packaging | Standard Export Carton Box |
| Payment Terms | T/T, Western Union, MoneyGram |
| Delivery Methods | DHL, Fedex, UPS, EMS, Air/Sea Freight |
We provide a full range of engine components for Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai.
| Category | Key Engine Parts (Keywords) |
|---|---|
| Main Engine Parts | Liner Kit, Piston, Piston Ring, Cylinder Liner, Cylinder Block, Cylinder Head, Connecting Rod |
| Gasket & Sealing | Full Gasket Kit, Gasket Head, Overhaul Kit, Oil Seal |
| Crankshaft & Bearings | Crankshaft, Engine Bearing, Main Bearing, Con Rod Bearing, Thrust Washer |
| Valvetrain | Valve Guide, Valve Seat, Inlet Valve, Exhaust Valve |
| Fuel System | Fuel Injection Pump, Nozzle, Injector, Diesel Pump |
| Cooling & Lubrication | Radiator, Water Pump, Oil Pump, Fan Cooling |
| Electrical & Turbo | Accelerator Motor, Monitor, Pressure Switch, Flameout Solenoid, Turbocharger |
| General Maintenance | Main Valve, Belt, Transmitter, Filters |
Honour Time Machinery Limited supports a wide variety of industrial engine models for reliable maintenance.
| Brand | Engine Models |
|---|---|
| Komatsu | 3D82, 3D84, 4D105, 6D95, 6D108, 6D110, 4D84, 4D95, 6D102, 6D105, 6D114, 6D170 |
| CATERPILLAR | 3114, 3116, C4, C6, 3064T, S6K, C7, C-9, C13 |
| KOBELCO | J05E, 6D34T, 6D16, J08E, 6D22T, 6D24T, 6D16T |
| Mitsubishi | 4D34, 4D24, K4M, S3Q2, 6D16, 6D24, S4KT, 6D40 |
| ISUZU | 3LD1, 4LE1, 4BG1, 4HK1, 6SD1, 6WG1, 4LE2, 4JB1, 6BG1, 6HK1, 6WF1 |
| Yanmar | 4D88E, 4TNE84, 4TNV88, 4TNV94L, 4TNE88, 4TNE94, 4TNV98, 4TNV106 |
| HINO | J05E, J08E, V25C, EF750, P11C, V21C, H06CT, H07D |
| CUMMINS | QSB6.7, QSM11-C, B5.9-C, B3.9-C, QSM11, C8.3-C |
| VOLVO | D6D, D6E, D9E, D12D, D7D, D7E, D12E, D16D |
Turbocharger: Found in Caterpillar 330D (C9 engine). Increases engine power by forcing extra air into the combustion chamber.
Cylinder Head: Essential for Komatsu PC300-7 (6D108 engine). It houses components like intake and exhaust valves.
Piston Ring: Installed on pistons in Isuzu 6HK1 (Hitachi ZX200-3). Prevents fuel and air from leaking out of the combustion chamber.
Water Pump: Vital for Cummins 6BT (Dongfeng trucks). Circulates coolant through the engine to prevent overheating.
Main Bearing: Located in the engine block of Yanmar 4TNV98 (Mini Excavators). Supports the rotating crankshaft.
Injector: Part of the fuel system in Kubota V2403 (Skid Steer Loaders). Delivers fuel at high pressure into the cylinders.
Alternator: Used in Weichai WD615 (Heavy Duty Trucks). Converts mechanical energy into electrical energy to charge the battery.
Connecting Rod: Links the piston to the crankshaft in Caterpillar D6R (3306 engine).
Solenoid Valve: Controls oil flow in Komatsu PC400-8 hydraulic pumps.
Oil Pump: Found in Isuzu 4BG1 (JCB 205 Excavator). Ensures all moving parts are lubricated to reduce friction.
Case Study: Hydraulic Power Loss in Komatsu PC120-6
Fault: Excavator experiences slow movement and hydraulic pressure drops when the oil temperature rises.
Solution: Inspect the Unloader Valve 723-30-56100. Often, internal seals wear out or the spring tension weakens. Replacing it with a high-precision replacement valve restores system pressure and cycle speeds.
Maintenance Plan: For Caterpillar C7 engines, always change the engine oil and fuel filters every 500 hours. Inspect the cylinder liners for wear and ensure the radiator is free from debris to prevent liner cavitation.
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