中文
Welcome to Guangzhou HanRui Hydraulic Co., Ltd. We specialize in providing the complete HPV0102 / HPV102 excavator hydraulic main pump spare parts overhaul kit (including cylinder blocks, piston shoes, valve plates, drive shafts, swashplates, and high-pressure seal kits), precision-manufactured as heavy-duty aftermarket replacement parts compatible with Hitachi engineering machinery equipment. Engineered to exact original dimensions, our overhaul kits allow field technicians to rebuild hydraulic main pumps at a fraction of new replacement costs.
Heavy-Duty Application & Working Scenarios
Engineered to withstand continuous high working pressure and demanding excavation environments:
- Quarrying & Mining Digging: High-hardness alloy cylinder blocks and bronze-faced valve plates withstand 350 Bar peak operating loads.
- Continuous Deep Trenching: Micro-lapped rotary group components preserve tight volumetric efficiency during all-day trench digging.
- Hydraulic Breaker Hammering: Reinforced piston shoes and drive shafts resist heavy hydraulic impact surges from breaker attachments.
- Fleet Overhaul & Rebuilding: Complete pre-packaged repair kit sets enable rapid shop or jobsite pump remanufacturing.
HPV0102 Hydraulic Main Pump Fault Diagnosis & Troubleshooting
Experiencing excavator hydraulic system failure? Worn internal pump parts account for over 90% of pressure loss cases. Here is how our HPV0102 / HPV102 Repair Kit resolves them:
1. Engine Stalling / Overloading Under Heavy Load (控泵熄火 / 闷车)
Symptom: Engine bogs down or shuts off completely when raising the boom or curling the bucket under heavy resistance.
Cause: Worn swashplate cradle bearings or sticking servo pistons failing to reduce pump angle and displacement.
Solution: Replacing swashplate support bearings and servo control components restores accurate displacement control.
2. System Pressure Drop & Weak Digging Force (系统掉压 / 工作无力)
Symptom: Slow attachment speeds, weak digging force, and loss of hydraulic speed as fluid temperature rises.
Cause: Internal oil slippage caused by micro-abrasion scoring on cylinder block faces, spherical bushes, or valve plates.
Solution: Micro-milled valve plates and high-grade alloy cylinder barrels eliminate fluid bypass and rebuild full 350 Bar pressure.
3. Hydraulic Oil Leakage at Main Shaft & Housing (主泵漏油)
Symptom: Hydraulic oil leaking continuously around the front drive shaft oil seal or intermediate pump housing joints.
Cause: Worn drive shaft seal journals or hardened rubber seal rings resulting from elevated case drain backpressure.
Solution: Induction-hardened drive shafts combined with premium NOK shaft seals stop fluid leaks completely.
4. Pump Cavitation Noise & Severe Vibration (泵体异响 / 抖动)
Symptom: Loud knocking noise or severe hydraulic hose shuddering under heavy hydraulic loading.
Cause: Worn piston shoe heads, damaged drive shaft splines, or loose center pin supports.
Solution: Precision-matched piston shoes and center pin assemblies restore quiet, smooth hydraulic rotation.
5. Hydraulic Oil Overheating & Thermal Fade (主泵发热高温)
Symptom: Hydraulic tank oil temperature spikes rapidly after 30 minutes of continuous machine operation.
Cause: Excessive friction and severe internal pressure recirculating bypass within worn rotary group parts.
Solution: Installing a complete new HPV0102 rotary group overhaul kit minimizes internal friction and heat generation.
Hot Popular Excavator Hydraulic Main Pumps & Spare Parts Catalog
Explore our factory-direct aftermarket catalog for major construction equipment brands:
| Machine Model (型号) | Part Number (零件号) | Component Name (品名) | Compatible Brand (适配品牌) | Target Fault Solved |
|---|---|---|---|---|
| EX200-5 / EX200-6 / ZX200 | HPV0102 / HPV102 Parts Kit | Main Pump Overhaul Repair Kit | Compatible with Hitachi | Fixes Pressure Drop & Engine Stalling |
| Cat 336GC / 336E | 509-5142 / K5V160DTP | Hydraulic Main Pump Assembly | Compatible with Caterpillar | Fixes Low Digging Pressure & Oil Leakage |
| SK330-8 / SK350-8 | LQ10V00018F1 / K3V180DT | Main Hydraulic Pump Assembly | Compatible with Kobelco | Fixes Pressure Instability & Internal Bypass |
| PC300-8 / PC350-8 | 708-2G-00020 / HPV160 | Hydraulic Main Piston Pump | Compatible with Komatsu | Fixes Slow Movement & Pump Noise |
| EC210B / EC240B | 14531223 / K3V112DT | Main Hydraulic Pump Assembly | Compatible with Volvo | Fixes Boom Hesitation & Shaft Oil Leakage |
Frequently Asked Questions (Troubleshooting & Fitment)
Q: What is the price range for an HPV0102 / HPV102 hydraulic pump repair kit?
A: Direct from our Guangzhou factory, the wholesale price range for an HPV0102 / HPV102 Hydraulic Main Pump Repair Kit (rotary group overhaul set) is $280.00 – $850.00 USD per set, depending on components included (pistons, cylinder block, valve plate, shafts). Purchasing directly from us saves 30% to 50% compared to local OEM dealer prices.
Q: Which excavator models use the HPV0102 / HPV102 hydraulic main pump repair kit?
A: The HPV0102 / HPV102 repair kit is compatible with 20-to-24-ton Hitachi excavators, including Hitachi EX200-5, EX200-6, EX220-5, EX230-5, ZX200, ZX210, ZX225USR, ZX230, and ZX240 excavators.
Q: What main parts are included in a full HPV0102 pump overhaul kit?
A: A complete HPV0102 pump overhaul kit includes: 14 Piston Shoes, 2 Cylinder Blocks, 1 Valve Plate (Right), 1 Valve Plate (Left), 1 Long Drive Shaft, 1 Short Drive Shaft, Center Pins, Swashplate Support, and a complete High-Pressure Seal Kit.
