SY750H SY870H SY950H 11422792 60021667 K5V200DT Hydraulic Main Pump Assembly Compatible with Sany

1. Product Overview & Wholesale Price Advantage

The Sany SY750H / SY870H K5V200DT Hydraulic Main Pump Assembly (OEM Part # 11422792 / 60021667 / 60208152 / K5V200DT / K5V200DTP) is an ultra-high pressure dual axial piston tandem variable displacement pump engineered for 75-to-95-ton heavy mining excavators working under extreme rock ripping, open-pit ore digging, and quarry loading operations.

• Direct Factory Wholesale Price: $7,800 – $13,500 USD (Direct Source Supply — Save 50%–65% vs Regional OEM Dealer Markups)
• Zero Middleman Markup: Shipped straight from our manufacturing floor with zero distributor extra fees
• MOQ & Bulk Tier Discount: 1 Unit (Tiered volume wholesale discounts available for international equipment fleets & repair dealers)
• Lead Time: 1–3 business days (Large factory stock ready for immediate air/sea shipping)
• Quality Guarantee: 12 Months full replacement factory warranty with 100% dynamic 380 Bar bench test video proof

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

Engineered with reinforced swashplates and heavy-duty roller bearings to handle continuous 380 Bar peak mining shock loads:

• Extreme Open-Pit Rock Mining: Massive continuous oil displacement for rapid loading of heavy 100-ton haul trucks with Sany SY750H excavators.
• Hard Rock Ripping & Quarrying: High sustained hydraulic pressure for uninterrupted boom penetration in granite and iron ore mining pits with SY870H machines.
• Massive Earthmoving & River Channeling: Electronically-controlled dual negative flow control for fuel-efficient long-hour continuous digging cycles.
• Demolition & Heavy Breaker Operations: Heavy cast iron pump housing built to absorb continuous high hydraulic pressure shockwaves from 210mm breaker attachments.

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

If your 75–95 ton mining excavator is exhibiting hydraulic system power loss, 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 SY750H main pump assembly (OEM 11422792 / K5V200DT) or overhaul the internal rotary group kit.
• Fault 2: Engine Stalls or Overloads When Actuating Heavy Mining Boom/Arm (憋车/发动机过载熄火)
  Root Cause: K5V200DT pump electronic 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 power matching.
• Fault 3: Hydraulic Oil Leakage From Main Drive Shaft Seal Area (主驱动轴封高压串油漏油)
  Root Cause: Clogged casing drain circuit 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 roller 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 Sany SY750H 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 K5V200DT main pump fits my Sany SY750H or SY870H excavator?
A: Check your original pump nameplate for OEM part numbers 11422792, 60021667, or K5V200DT stamp. You can also send us your machine serial number for instant fitment verification.

Q2: My Sany SY750H mining excavator stalls the engine when digging hard rock. Will replacing the pump solve it?
A: Yes, engine stalling under mining load is usually caused by a faulty pump regulator valve failing to de-stroke properly. Installing our pre-calibrated K5V200DT pump restores correct engine-hydraulic power matching.

Q3: Is this Sany SY750H hydraulic main pump bench tested before shipment?
A: Yes, every single K5V200DT pump undergoes a 5-step factory bench pressure test up to 380 Bar and volumetric efficiency check above 95%. A live test video is provided before shipping.