中文
Welcome to Guangzhou HanRui Hydraulic Co., Ltd. We specialize in providing the complete K3V63 / K3V63DT excavator hydraulic main pump assembly and spare parts repair kit (including cylinder blocks, piston shoes, valve plates, swashplate assemblies, drive shafts, and high-pressure seal kits), precision-manufactured as heavy-duty aftermarket replacement parts compatible with Kawasaki, Kobelco, Hyundai, and Doosan engineering machinery equipment. Located in Guangzhou Tianhe Engineering Machinery Business Circle, we supply OEM-quality hydraulic components directly to global clients at factory-wholesale prices.
Heavy-Duty Application & Working Scenarios
Engineered to withstand demanding medium excavator digging cycles and continuous high-pressure hydraulic output:
- Urban Utility Trenching & Excavation: Micro-lapped bronze valve plates and alloy pistons maintain peak flow efficiency under 34.3 MPa (343 Bar) pressure.
- Continuous Road Construction & Earthmoving: High volumetric efficiency guarantees rapid boom hoist and bucket stroke compound movements for 12-15 ton excavators.
- Hydraulic Breaker Operations: Heavy-duty swashplates and cradle bearings absorb violent hydraulic shock spikes from breaker attachments.
- Fleet Overhaul & Remanufacturing: Complete packaged overhaul kits enable fast, cost-effective on-site main pump rebuilding.
K3V63 Hydraulic Main Pump Fault Diagnosis & Troubleshooting
Experiencing main pump performance loss or operational sluggishness? Over 90% of field repair searches involve internal pump wear. Here is how our K3V63 Spare Parts & Overhaul Kit resolves them:
1. Engine Stalling / Overloading Under Heavy Load (控泵熄火 / 闷车)
Symptom: Engine bogs down or stalls completely when pulling heavy digging loads or raising the boom.
Cause: Sticking pump regulators, worn swashplate cradle bearings, or damaged servo pistons failing to reduce pump displacement.
Solution: Replacing worn K3V63 swashplate cradles and servo tilt pins restores accurate displacement control and prevents engine stalling.
2. System Pressure Drop & Weak Digging Force (系统掉压 / 工作无力)
Symptom: Slow attachment speeds, weak bucket break-out force, and speed fade as hydraulic oil temperature rises.
Cause: Micro-abrasion scoring on cylinder block faces, spherical bushes, or valve plates causing internal fluid bypass.
Solution: Precision-milled K3V63 cylinder blocks and spherical valve plates eliminate inner slippage and rebuild full operating pressure.
3. Hydraulic Oil Leakage at Main Shaft & Housing (主泵漏油)
Symptom: Hydraulic fluid leaking around the front drive shaft oil seal or intermediate housing mating joints.
Cause: Shaft seal journal grooving wear or seal lip hardening caused by high case drain backpressure and oil heat.
Solution: Induction-hardened drive shafts combined with premium NOK high-pressure shaft seals stop oil leaks completely.
4. Pump Cavitation Noise & Severe Vibration (泵体异响 / 抖动)
Symptom: High-pitched whining noise or heavy hydraulic hose shuddering during pump rotation.
Cause: Worn piston shoe heads, damaged drive shaft splines, or loose cylinder block center pin supports.
Solution: Precision-matched piston shoes and center pin press assemblies restore smooth, vibration-free 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: High fluid friction and severe internal pressure recirculating bypass within worn rotary group components.
Solution: Installing a complete new K3V63 rotary group overhaul kit minimizes internal friction and operational oil heat.
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 |
|---|---|---|---|---|
| SK120-6 / SK130-8 / R140-7 | K3V63 / K3V63DT Kit | Main Pump Overhaul Repair Kit | Compatible with Kobelco / Kawasaki | Fixes Engine Stalling & Low Pressure Loss |
| SK200-8 / SK210-8 / R215-7 | K5V80 / K5V80DT Kit | Main Pump Overhaul Repair Kit | Compatible with Kobelco / Kawasaki | Fixes Engine Stalling & Low Pressure Loss |
| Cat 336GC / 336E | 509-5142 / K5V160DTP | Hydraulic Main Pump Assembly | Compatible with Caterpillar | Fixes Low Digging Pressure & Oil Leakage |
| EX200-5 / EX200-6 / ZX200 | HPV0102 / HPV102 Parts Kit | Main Pump Overhaul Repair Kit | Compatible with Hitachi | Fixes Casing Leakage & Bearing Seat Wear |
| PC300-8 / PC350-8 | 708-2G-00020 / HPV160 | Hydraulic Main Piston Pump Parts | Compatible with Komatsu | Fixes Slow Movement & Pump Noise |
Frequently Asked Questions (Troubleshooting & Fitment)
Q: What is the price range for a K3V63 / K3V63DT hydraulic pump repair kit?
A: Direct from our Guangzhou factory, the wholesale price range for a complete K3V63 / K3V63DT Hydraulic Main Pump Repair Kit (rotary group overhaul set) is $180.00 – $580.00 USD per set, depending on components included (piston shoes, cylinder block, valve plate, swashplate, shafts). Purchasing directly saves 30% to 50% compared to local OEM dealer prices.
Q: Which 12-15 ton excavator models use the Kawasaki K3V63 / K3V63DT hydraulic pump?
A: The K3V63 / K3V63DT hydraulic main pump is widely used on 12-to-15-ton excavators, including Kobelco SK120-6, SK130-8, Hyundai R130-5, R140-7, Doosan DX140, DH150-7, Sumitomo SH120, and SANY SY135C excavators.
Q: What main parts are included in a full K3V63 pump overhaul kit?
A: A complete K3V63 overhaul kit includes: 2 Cylinder Blocks, 18 Piston Shoes, 1 Valve Plate (Right or Left), 1 Swashplate Assembly, Spherical Bushes, Center Pins, Drive Shafts, Bearings, and a High-Pressure Seal Kit.
