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Home > Products > Excavator Hydraulic Pump >
SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442

SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442

391-9442 main piston pump

391-9442

excavator hydraulic pump

Place of Origin:

China

Brand Name:

CAVOYD

Model Number:

E311D2 E312D2 E313D2 E315D2GC

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SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442 SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442 SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442 SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442 SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442 SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442
Product Details
Supply Ability:
300 Sets / Month
Warranty:
6 Months
Packaging Details:
Wooden Case / Cartonwith Foam Protection, Or As Required
Price:
Negotiable
MOQ:
1 Set
Transportation Method:
DHL, UPS, FedEx, Sea Freight
Product Name:
Hydraulic Pump Assembly
Delivery Time:
3-8 Working Days
Part No:
391-9442
Condition:
New / Rebuilt
Payment Terms:
Western Union, T/T, Assurance
Highlight:

391-9442 main piston pump

,

391-9442

,

excavator hydraulic pump

Payment & Shipping Terms
Minimum Order Quantity
1 set
Price
Negotiable
Packaging Details
Dimension: L50×W50×H50 cm
Delivery Time
3-8 days
Payment Terms
T/T
Supply Ability
300pcs/day
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CONTACT US
86--18127821703
280835749@qq.com
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Product Description
Common Faults & Diagnosis
  1. Slow operation when hot, weak digging: Worn valve plate, cylinder, or piston slipper; excessive internal leakage caused by oil contamination.
  2. Engine bogging under heavy load: Stuck or worn regulator servo parts; abnormal power control.
  3. Pump squeal & vibration: Suction air leak, blocked filter (cavitation), or damaged bearing.
  4. Low pressure & poor combined action: Worn servo valve or stuck regulator spool.
  5. Seal leakage: Aged seals, housing defects, or damaged mating surfaces.

Important: Metal powder in the oil indicates severe wear. Clean the oil circuit and replace filters when changing the pump.

Purchase Tips
  1. Confirm the part number — it is not interchangeable with other models.
  2. Available Options
    Original new: Reliable, high cost, long lead time.
    OEM new: Cost-effective for export; ask for a pressure test report.
    Rebuilt: Budget choice; confirm warranty terms.
    Used pump: High risk — not recommended for export.
  3. Test pump pressure first to exclude valve or pilot pump faults.
  4. Buy hydraulic oil, filters, and a seal kit together.
  5. Export: Fumigated wooden crate with test report.
  6. Warranty excludes damage from dirty oil, air ingress, and incorrect installation.
SBS80 CAT E311D2 E312D2 E313D2 E315D2GC Excavator Main Hydraulic Piston Pump for 391-9442
Tags：

hydraulic piston pump

hydraulic pump for excavator

main hydraulic pump assembly

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Guangzhou Kawo Construction Machinery Co.,Ltd.
With 20 years of professional experience in construction machinery hydraulics, CAVOYD focuses on hydraulic spare parts supply and remanufacturing for excavators, bulldozers and loaders. We mainly supply hydraulic pumps, control valves, swing assemblies, travel assemblies, fan pumps and fan motors. Our parts fit Caterpillar, Komatsu, Volvo, Hitachi, Kobelco, Sany, Doosan and other mainstream brands. We provide high-quality new parts and precision remanufactured parts, serving global clients wit
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