D2366 Oil Pump 65.05100-6044A 400915-00021 400915-00021B for DE12 DE12TIS DX380LC DH500LC-7 Excavator

The D2366 Oil Pump Assembly is a replacement engine lubrication component designed for DE12 and DE12TIS diesel engines, including compatible DX380LC and DH500LC-7 excavator applications.

Referenced by part numbers 65.05100-6044A, 400915-00021 and 400915-00021B, this oil pump is designed to circulate engine oil throughout the lubrication system, helping maintain proper oil pressure and deliver consistent lubrication to critical engine components.

Built with a durable metal housing and precision gear-drive structure, the pump is suitable for engine repair, overhaul and replacement of worn or damaged oil pump assemblies in heavy construction machinery.

Product Features

• Engine Model: D2366 / DE12 / DE12TIS
• Part Number: 65.05100-6044A
• Reference Number: 400915-00021
• Alternative Number: 400915-00021B
• Product Type: Engine Oil Pump Assembly
• Suitable for DX380LC Excavator
• Suitable for DH500LC-7 Excavator
• Efficient engine oil circulation
• Designed to maintain stable lubrication pressure
• Precision gear-driven pump structure
• Durable metal housing for heavy-duty operation
• Reliable performance under demanding working conditions
• Suitable for engine overhaul and replacement
• Quality inspected before shipment

Product Specifications

Compatible Engines & Excavator Models

The 65.05100-6044A / 400915-00021 Oil Pump is intended for compatible applications including:

Engine Models

• DE12
• DE12TIS
• D2366 applications

Excavator Models

• DX380LC
• DH500LC-7

Compatibility Notice: Engine and oil pump configurations can vary by machine serial number and engine specification. Please verify the part number, engine model, machine model and original pump configuration before ordering.

Key Advantages

Efficient Oil Circulation

The pump circulates lubricating oil through the engine to help ensure critical internal components receive an adequate oil supply during operation.

Stable Lubrication Performance

Consistent oil delivery helps maintain engine lubrication and supports reliable operation under different working loads.

Precision Gear Drive

The gear-driven design provides dependable mechanical operation and efficient oil transfer within the engine lubrication system.

Heavy-Duty Construction

A robust metal housing and durable internal components make the pump suitable for demanding excavator, construction and earthmoving applications.

Direct Replacement Solution

Designed for corresponding DE12 and DE12TIS engine applications, making it suitable for engine rebuilding, repair and oil pump replacement.

Oil Pump Function

The engine oil pump is a critical component of the diesel engine lubrication system. Its primary function is to draw oil from the oil pan and circulate it under pressure to engine components requiring lubrication.

Proper oil circulation helps protect components such as:

• Crankshaft and bearings
• Connecting rod bearings
• Camshaft components
• Valve train
• Timing components
• Other internal engine moving parts

Reliable oil pump performance is essential for reducing friction, controlling wear and maintaining proper engine lubrication.

Common Signs of Oil Pump Problems

Inspection of the oil pump and lubrication system may be required when experiencing:

• Low engine oil pressure
• Oil pressure warning
• Abnormal engine noise
• Insufficient lubrication
• Increased engine operating temperature
• Unusual wear of internal engine components
• Oil pressure dropping under load

Low oil pressure can have multiple causes, so the oil level, oil filter, pressure sensor, lubrication passages, bearing clearances and oil pump should be checked before replacement.

Typical Applications

The D2366 / DE12 Oil Pump Assembly is suitable for heavy equipment used in:

• Excavation
• Earthmoving
• Mining
• Quarry operations
• Road construction
• Infrastructure projects
• Heavy equipment repair
• Diesel engine rebuilding

Why Choose JISION?

JISION specializes in replacement parts for excavators, diesel engines and construction machinery, including oil pumps, water pumps, fuel system parts, hydraulic components, engine overhaul parts, electrical components and cooling system parts.

We support equipment owners, repair workshops, distributors, importers and wholesalers, with single-unit and bulk purchasing available.

JISION provides professional part-number matching, pre-shipment inspection, secure export packaging and international shipping support.

Order Information

For faster quotation and compatibility confirmation, please provide:

Part Number: 65.05100-6044A / 400915-00021 / 400915-00021B
Engine Model: DE12 / DE12TIS
Excavator Model: DX380LC / DH500LC-7
Machine or Engine Serial Number: Recommended
Required Quantity: 1 PC or Bulk Order

For more accurate matching, photos of the original oil pump and its part-number markings are recommended.

Short Description

JISION D2366 Oil Pump Assembly 65.05100-6044A / 400915-00021 / 400915-00021B for DE12 and DE12TIS diesel engines, suitable for compatible DX380LC and DH500LC-7 excavator applications. Designed for efficient oil circulation, stable lubrication pressure and reliable engine performance.

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