PC750-7 SK850 SY750H K3V280DT Kawasaki K3V280 Hydraulic Pump Repair Kit Compatible with Komatsu Kobelco Sany XCMG

1. Product Overview & Wholesale Price Range

The Kawasaki K3V280 / K3V280DT Hydraulic Main Pump Repair Kit (OEM Part # K3V280 / K3V280DT / K3V280DTH) includes the complete internal rotary group overhaul set: cylinder block, piston shoes with heavy-duty bronze slippers, distributor valve plate (RH/LH), retainer plate, ball guide, swash plate cradle, and drive shaft designed for 60-to-80-ton ultra-heavy mining excavators undergoing main pump overhauls.

• Factory Wholesale Price: $550 – $1,200 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
• Included Core Spare Parts: Cylinder Block (1pc) + Piston Shoes (9pcs) + Valve Plate (1pc) + Retainer Plate (1pc) + Ball Guide (1pc) + Swash Plate Cradle (1pc)
• MOQ & Bulk Discount: 1 Set (Tiered wholesale discounts available for hydraulic repair shop batch orders)
• Lead Time: 1–3 business days (Large factory stock ready for immediate worldwide dispatch)
• Warranty: 12 Months full replacement warranty with high-lead bimetallic bronze durability guarantee

2. Application Worksite Checklist (施工场景清单)

Engineered to restore original hydraulic working pressure across demanding 60-80 ton heavy mining excavators:

• Heavy Open-Pit Quarrying & Mining: Restores maximum hydraulic pressure up to 380 Bar during continuous rock loading with Komatsu PC750 excavators.
• Mass Foundation Excavation & Ore Ripping: High thermal resistance bimetallic plates prevent power loss during long-hour continuous heavy digging.
• Highway Deep Infrastructure Trenching: Micro-lapped cylinder faces ensure zero internal oil bypass during fast bucket loading cycles.
• Demolition & Heavy Breaker Operations: Case-hardened steel pistons withstand continuous high hydraulic pressure shockwaves from heavy shear attachments.

3. Hydraulic Pump Overhaul & Fault Diagnostic Guide (维修包常见故障排查)

If your 60–80 ton mining excavator main pump is exhibiting performance degradation, check the wear symptoms below:

• Fault 1: Thermal Pressure Loss & Machine Slowdown After 1 Hour (热车掉压发慢/内泄)
  Root Cause: Wear gap between the cylinder block face and valve plate surface causing internal high-pressure thermal oil bypass.
  Solution: Replace the worn rotary group with our precision lapped K3V280DT cylinder block and valve plate kit.
• Fault 2: Engine Stalls or Lacks Digging Force Under Heavy Bucket Load (憋车熄火/无力)
  Root Cause: Scoring on piston shoe brass slippers or stickiness in the swashplate cradle pivot.
  Solution: Install new K3V280 copper-coated piston shoes and swashplate group to restore smooth stroke control.
• Fault 3: Black Copper Filings Found in Hydraulic Tank Oil Filter (油箱内有黑粉铜屑)
  Root Cause: Friction galling and thermal melting of the bronze layer on the piston slippers under high pressure.
  Solution: Flush the entire hydraulic oil system, clean main control valve, and rebuild pump with a new K3V280 repair kit.
• Fault 4: Abnormal Pulsation Noise & Chattering From Pump Housing (泵体异响/震动)
  Root Cause: Broken retainer plate spring, worn ball guide, or pitted swashplate surface.
  Solution: Replace ball guide, retainer plate, and swashplate assembly to eliminate mechanical chatter.

4. Hot Machinery Replacement Parts Recommendation (5大品类热门推荐表)

Explore our factory-direct replacement hydraulic components compatible with major global excavator brands:

5. Frequently Asked Questions & Technical Support (QA 问答专区)

Q1: How do I verify if this K3V280 repair kit fits my Komatsu PC750 or Kobelco SK850 main pump?
A: Check your original pump nameplate for model stamps K3V280, K3V280DT, or K3V280DTH. You can also send us photos of your old cylinder block and pistons for instant fitment verification.

Q2: What is the material composition of the K3V280 cylinder block and piston slippers?
A: Our K3V280 cylinder blocks are made of high-density forged alloy steel with bimetallic copper-alloy distribution faces, and the piston shoes feature high-lead bronze slippers rated for continuous 380 Bar working pressure.

Q3: Is this K3V280 repair kit a complete overhaul solution for heavy mining main pump rebuilds?
A: Yes, it includes all major internal wear components (cylinder block, 9 pistons, valve plate, retainer plate, ball guide, and swashplate) required for a complete pump rebuild.