PC60-5 PC60-6 PC60-7 708-1W-00030 708-1W-00010 HPV35 Hydraulic Main Pump Repair Kit Compatible with Komatsu

1. Product Overview & Wholesale Price Range

The Komatsu PC60 HPV35 Hydraulic Main Pump Repair Kit (OEM Part # 708-1W-00030 / 708-1W-00010 / HPV35) includes the complete internal rotary group: cylinder block, piston shoes, distributor valve plate (RH/LH), retainer plate, ball guide, and swash plate built for 6-ton excavators undergoing hydraulic pump overhauls.

• Factory Wholesale Price: $280 – $650 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
• Included Spare Parts: Cylinder Block (1pc) + Piston Shoes (9pcs) + Valve Plate (1pc) + Retainer Plate (1pc) + Ball Guide (1pc) + Swash Plate (1pc)
• MOQ & Bulk Discount: 1 Set (Tiered wholesale discounts available for repair shop bulk orders)
• Lead Time: 1–3 business days (Large factory stock ready for immediate dispatch)
• Warranty: 12 Months full replacement warranty with high-copper alloy durability guarantee

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

Engineered to restore original hydraulic working pressure across demanding compact excavator jobsites:

• Urban Pipe Trenching & Utility Laying: Restores smooth hydraulic power matching for trench digging with Komatsu PC60-6 excavators.
• Residential Foundation & Site Leveling: High thermal resistance alloy plates prevent power loss during continuous long-hour digging.
• Road Repair & Municipal Earthmoving: Precision lapped cylinder faces ensure zero internal oil bypass during fast bucket loading cycles.
• Small Demolition & Hammer Breaking: Case-hardened steel pistons withstand continuous high hydraulic pressure spikes.

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

If your Komatsu PC60 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 HPV35 cylinder block and valve plate kit (OEM 708-1W-00030).
• 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 HPV35 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.
  Solution: Flush the entire hydraulic oil system, clean main control valve, and rebuild pump with a new HPV35 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 HPV35 repair kit fits my Komatsu PC60-6 excavator main pump?
A: Check your original pump nameplate for OEM part numbers 708-1W-00030, 708-1W-00010, or HPV35 stamp. You can also send us photos of your old cylinder block and pistons for instant verification.

Q2: What is the material hardness of the HPV35 cylinder block and piston slippers?
A: Our HPV35 cylinder blocks are made of high-density alloy steel with bimetallic copper-alloy distribution faces, and the piston shoes feature high-lead bronze slippers rated for continuous 320 Bar pressure.

Q3: Is this HPV35 repair kit a complete drop-in overhaul solution?
A: Yes, the kit includes all major wear parts (cylinder, 9 pistons, valve plate, retainer plate, ball guide, and swashplate) required for a complete pump rebuild.