SY285C SY305C XE270D 11422791 60021666 Hengli K5V140DTP Hydraulic Main Pump Assembly Compatible with Sany XCMG LiuGong

1. Product Overview & Wholesale Price Range

The Hengli K5V140DTP Hydraulic Main Pump Assembly (OEM Part # 11422791 / 60021666 / K5V140DTP / K5V140DT) is a high-capacity axial piston tandem variable displacement pump engineered for 25-to-30-ton heavy excavators operating under mining, rock breaking, and bulk earthmoving environments.

• Factory Wholesale Price: $3,800 – $6,800 USD (Direct manufacturer pricing — Save up to 50% vs regional dealer markups)
• MOQ & Bulk Discount: 1 Unit (Tiered wholesale discounts available for batch container orders)
• Lead Time: 1–3 business days (Large factory stock ready for immediate worldwide dispatch)
• Warranty: 12 Months full replacement warranty with 100% bench test video proof

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

Precision-matched displacement control designed for continuous high hydraulic power output under harsh conditions:

• Heavy Open-Pit Quarrying & Mining: High sustained hydraulic flow under 350 Bar working pressure for rapid rock truck loading with Sany SY305C excavators.
• Highway Trenching & Earthmoving: Smooth dual-circuit hydraulic displacement during simultaneous boom lifting, arm crowding, and swing movements on XCMG XE270D machines.
• Deep Foundation Excavation & Land Clearing: Fuel-efficient hydraulic flow matching for long-hour earth excavation with LiuGong 925E excavators.
• Demolition & Heavy Concrete Crushing: Reinforced pump housing protects against severe pressure shockwaves from heavy breaker hammer attachments.

3. Hydraulic Main Pump Troubleshooting & Diagnostic Guide (液压泵常见故障排查)

If your 25–30 ton excavator is exhibiting hydraulic system failure, consult the diagnostic guide below:

• Fault 1: Cold Machine Operates Normally, But Machine Slows Down & Drops Pressure After 1 Hour (冷车正常,热车掉压发慢)
  Root Cause: Thermal expansion wear gap between the piston shoes, cylinder block, and valve plate, causing internal high-pressure oil thermal bypass.
  Solution: Replace with a complete drop-in K5V140DTP main pump assembly (OEM 11422791) or overhaul the internal rotary group kit.
• Fault 2: Engine Stalls or Overloads When Actuating Hydraulic Boom/Arm (憋车/发动机过载熄火)
  Root Cause: K5V140DTP pump regulator power-control spool jammed or hydraulic pilot regulator valve miscalibrated.
  Solution: Recalibrate pump regulator pilot pressure or replace the complete regulator assembly to restore engine horsepower matching.
• Fault 3: Hydraulic Oil Leakage From Drive Shaft Seal Area (主驱动轴封高压串油漏油)
  Root Cause: Clogged casing drain line causing excessive internal housing backpressure, blowing out the front drive shaft skeleton seal.
  Solution: Flush housing drain lines, replace front drive shaft seal, and check gear pilot pump relief pressure.
• Fault 4: Abnormal Cavitation Noise or Severe Vibration From Main Pump (泵体异响抖动/气蚀)
  Root Cause: Air suction at inlet suction pipe, contaminated hydraulic tank filter, or worn drive shaft bearings.
  Solution: Replace suction line seals, flush hydraulic fluid tank, and replace drive shaft roller bearings.
• Fault 5: Black Metallic Filings Found Inside Hydraulic Tank Filter (油箱内有黑粉或金属屑)
  Root Cause: Severe friction galling on swashplate shoe bronze layer or cylinder block face failure.
  Solution: Flush entire hydraulic piping system, clean main control valve, and install a new K5V140DTP main pump assembly.

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 K5V140DTP main pump fits my Sany SY305C or XCMG XE270D excavator?
A: Check your original pump nameplate for OEM numbers 11422791, 60021666, or K5V140DTP stamp. You can also send us your machine serial number for instant fitment verification.

Q2: My Sany SY305C excavator stalls the engine when digging heavy rock. Will replacing the pump solve it?
A: Yes, engine stalling is usually caused by a faulty pump regulator valve failing to stroke down under load. Installing our pre-calibrated K5V140DTP pump restores correct engine power matching.

Q3: Is this Hengli K5V140DTP hydraulic main pump bench tested before shipment?
A: Yes, every single main pump undergoes a 5-step factory bench test, verifying pressure up to 350 Bar and volumetric efficiency above 95%. A live test video is provided before shipping.