LiuGong 906E Sany SY60 11C0678 11422789 KYB Hengli HP5V76 Hydraulic Main Pump Assembly Compatible with LiuGong Sany Sunward SDLG
The KYB / Hengli HP5V76 Hydraulic Main Pump Assembly (OEM Part # 11C0678 / 11422789 / HP5V76 / PSVD2-27E) is a dual axial piston tandem main pump engineered for 6-to-7-ton mini and mid-size excavators operating under continuous urban trenching, landscaping, and foundation digging works.
- Factory Wholesale Price: $1,200 – $2,300 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
Precision-matched flow control designed to deliver smooth hydraulic power across 6-7 ton excavator jobsites:
- Urban Utility Trenching & Cable Laying: Fine hydraulic metering for smooth bucket and arm control in narrow ditches with LiuGong 906E excavators.
- Residential Foundation & Earthmoving: Sustained hydraulic working pressure under 280 Bar during foundation digging and site leveling with Sany SY60 excavators.
- Agricultural Drainage & Irrigation Maintenance: Thermal-resistant seal groups prevent oil bypass during long continuous operating hours on Sunward SWE70 and SDLG 65E machines.
- Municipal Road Repair & Landscaping: Fast response hydraulic flow for quick bucket loading and grading cycles in compact city spaces.
If your 6-7 ton excavator is exhibiting hydraulic system failure, consult the diagnostic guide below:
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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 HP5V76 main pump assembly (OEM 11C0678 / 11422789) or overhaul the 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: HP5V76 pump regulator control spool jammed or pilot pressure relief 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 HP5V76 main pump assembly.
Explore our factory-direct replacement hydraulic components compatible with major global excavator brands:
| Category (品类) | Machine Model (适用型号) | OEM Part Number (零件号) | Compatibility (适配品牌) |
|---|---|---|---|
| Hydraulic Main Pump | LiuGong 906E / Sany SY60 | 11C0678 / 11422789 / HP5V76 | Compatible with LiuGong Sany |
| Hydraulic Main Pump | CAT 306 / 306E | 458-1033 / AP2D28 | Compatible with Cater*pillar |
| Hydraulic Main Pump | CAT 305CR / 305.5D | 235-4254 / AP2D25 | Compatible with Cater*pillar |
| Hydraulic Main Pump | EX120-5 / EX130-5 | 4372038 / HPV091DS | Compatible with Hitachi |
| Hydraulic Main Pump | SK200-6 / SK210-6 | YN10V00003F1 / K3V112DTP | Compatible with Kobelco |
| Slewing Motor Assembly | EX60-1 / EX60-2 | 4188099 / 4255146 | Compatible with Hitachi |
| Final Drive Travel Motor | CAT 320C / 320D | 191-8390 / 227-6170 | Compatible with Cater*pillar |
Q1: How do I verify if this HP5V76 main pump fits my LiuGong 906E or Sany SY60 excavator?
A: Check your original pump nameplate for OEM part numbers 11C0678, 11422789, or HP5V76 stamp. You can also send us your machine serial number for instant fitment verification.
Q2: My Sany SY60 excavator stalls the engine when digging. Will replacing the HP5V76 pump fix this?
A: Yes, engine stalling is usually caused by a sticking pump regulator valve failing to de-stroke under load. Installing our pre-calibrated HP5V76 pump restores smooth engine power matching.
Q3: Is this Hengli KYB HP5V76 hydraulic main pump bench tested before shipment?
A: Yes, every single HP5V76 pump undergoes a 5-step factory bench test, verifying pressure up to 280 Bar and volumetric efficiency above 95%. A live test video is provided before shipping.
