Heavy Machinery Hydraulic System Spare Parts
OEM-quality hydraulic pumps, main control valves, boom/lift/jack cylinders, seal kits, and pilot system components — covering SANY, XCMG, ZOOMLION, LIUGONG, SHANTUI, SDLG, and more. Kawasaki K3V/K5V and Rexroth A10V/A11V compatible.
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1. Hydraulic Pump Assemblies
| Part Category | Typical Models | Compatible Brands | OEM Cross-Reference |
|---|---|---|---|
| Main Pump (Piston) | K3V112DT, K3V140DT, K5V160DT | SANY, XCMG, ZOOMLION | Kawasaki OEM-compatible |
| Main Pump (Piston) | A10VSO140, A11VLO190 | LIUGONG, SDLG | Rexroth OEM-compatible |
| Gear Pump (Pilot) | CBGj2040, CBGj2080 | All Chinese brands | 国产标准件 |
| Pump Regulator | K3V-series regulator | SANY, KOMATSU | Kawasaki pattern |
| Shaft Seal Kit | K3V/K5V seal kit | Universal | NBR / FKM options |
2. Hydraulic Cylinders
| Part Category | Application | Key Specs | Typical Failure |
|---|---|---|---|
| Boom Cylinder | Excavator (20T-50T) | 120-180mm bore | Rod scoring, seal blowout |
| Arm Cylinder | Excavator (20T-50T) | 110-160mm bore | Piston seal wear |
| Bucket Cylinder | Excavator / Wheel Loader | 90-140mm bore | Rod bending under side load |
| Lift Cylinder | Wheel Loader | 100-180mm bore | Internal bypass (creep) |
| Tilt Cylinder | Wheel Loader / Bulldozer | 80-140mm bore | Gland nut loosening |
3. Main Control Valve (MCV) & Valves
| Part Category | Common Models | Function | Compatible Equipment |
|---|---|---|---|
| Main Control Valve (MCV) | KMX15R, KVMM-280 | Flow distribution to all circuits | SANY SY215C-SY485H |
| Solenoid Valve | DTW024, DTF Series | Pilot control / safety lock | Universal |
| Relief Valve | MRV-03, DBDS Series | Overload protection | All excavators / cranes |
| Check Valve | MCV-02, S Series | One-way flow control | Universal |
| Joystick (Pilot Valve) | 4THS5, PV48 | Operator control interface | SANY, XCMG, ZOOMLION |
4. Seal Kits & Hydraulic Consumables
| Kit Type | Content | Material | Service Interval |
|---|---|---|---|
| Cylinder Full Seal Kit | Rod seal + Piston seal + Wiper + O-rings + Backup rings | PU + NBR + PTFE | Per cylinder overhaul (3,000-5,000 hr) |
| Pump Seal Kit | Shaft seal + O-rings + Gaskets | FKM (Viton) for high-temp | Per pump rebuild |
| Swivel Joint Seal Kit | Rotary seals + O-rings | NBR + PTFE | 2,000-3,000 hr |
| Hydraulic Filter Element | Return / Suction / Pilot filters | Glass fiber / Wire mesh | 500 hr or per oil change |
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