OEM AT331223 AT317640 Tandem Hydraulic External Gear Pump Replacement for John Deere Backhoe Loaders 310G, 310SG, 310SJ, 310SK, 310SL, 315 P, 315J, 315SG, 315SK, 315SL, 325J, 325SK Factory, Factories

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OEM AT331223 AT317640 Tandem Hydraulic External Gear Pump Replacement for John Deere Backhoe Loaders 310G, 310SG, 310SJ, 310SK, 310SL, 315 P, 315J, 315SG, 315SK, 315SL, 325J, 325SK Factory, Factories

AT331223 / AT317640 is a Tandem Hydraulic External Gear Pump replacement part specifically designed for John Deere backhoe loaders. It offers direct replacement with original equipment specifications and is compatible with models 310G, 310SG, 310SJ, 310SK, 310SL, 315P, 315J, 315SG, 315SK, 315SL, 325J, and 325SK models. It delivers stable hydraulic power for the machine's compound movements, serving as a core component for ensuring operational efficiency. It delivers dual independent oil sources for compound actions like boom, bucket, swing, and steering, meeting the demand for synchronized multi-action operation. Widely used in high-frequency compound action scenarios for excavator-loaders in municipal engineering, infrastructure construction, agricultural and forestry transformation, small-scale mining, and similar applications.

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Product Description

Product Overview

The AT331223 / AT317640 Dual External Gear Pump is the core hydraulic component for Deere 310G, 310SG, 310SJ, 310SK, 310SL, 315P, 315J, 315SG, 315SK, 315SL, 325J, and 325SK series backhoe loaders. Its core value lies in direct OEM specification replacement, dual-path oil supply for composite high efficiency, durability, and reliability. This pump rapidly restores the machine's composite operation capability, adapting to various engineering scenarios. The AT331223 / AT317640 hydraulic pump replacement features identical interfaces and dimensions to the original equipment, eliminating the need for additional machining or modification and reducing downtime for maintenance.

Technical Specifications

Part Name	Hydraulic Pump	Part Number	AT331223 / AT317640
Compatible Equipment	Backhoe Loader	Product Type	Tandem External Gear Pump
Weight	58 lb	Height	6.25 in
Width	10 in	Length	14 in
Origin	China	Quality	OEM Standard
Compatible Models	310G, 310SG, 310SJ, 310SK, 310SL, 315 P, 315J, 315SG, 315SK, 315SL, 325J, 325SK
Core Usage	Provides dual independent hydraulic power sources for compound movements such as boom, bucket, slewing, and steering, enabling simultaneous operation of multiple functions.
Applications	Municipal engineering, infrastructure construction, agricultural and forestry transformation, small-scale mining, and other excavator/loader high-frequency composite operation scenarios.
Related Models	AT334876/PG200235, AT179792, AT428960, AT153470, AT310590, AT440858, AT501973, AT101453/AT163523

Key Features

Direct Replacement

Interfaces and dimensions match OEM specifications, eliminating the need for additional machining or modifications, thereby reducing downtime.

Dual-Path Oil Supply

Twin-pump design with independent dual-path oil supply supports simultaneous multi-action operation, enhancing operational efficiency.

Durable & Reliable

Compact gear pump construction with high impact resistance. Key components feature wear resistance, low maintenance costs, and high variable load resilience.

Cost-Effective

High-quality aftermarket replacement parts cost less than brand new OEM pumps while balancing long-term performance and reliability.

Compatible Models

310G

310SG

310SJ

310SK

310SL

315 P

315J

315SG

315SK

315SL

325J

325SK

Frequently Asked Questions

1. Which backhoe loader models is the AT331223 / AT317640 compatible with?

It is compatible with 12 models: 310G, 310SG, 310SJ, 310SK, 310SL, 315P, 315J, 315SG, 315SK, 315SL, 325J, and 325SK. It is a direct replacement with fully compatible interfaces and dimensions.

2. Is the AT331223 / AT317640 an OEM part or an aftermarket part?

AT331223 / AT317640 represents the original manufacturer part number. It includes both new/remanufactured parts from the original equipment manufacturer and aftermarket replacements from high-quality third-party brands. Aftermarket parts are labeled as "Direct Replacement for AT331223 / AT317640."

3. What tools and accessories are required before installing the pump?

Essential tools include a torque wrench (set per OEM specifications), socket set, lifting tools, hydraulic oil filling pump, and filter wrench. You should also prepare new hydraulic oil, compatible filter elements, and high-pressure seals (O-rings/gaskets). We recommend replacing aged hoses to prevent secondary contamination.

4. What critical steps should be followed during installation to prevent failures?

First, drain hydraulic system pressure and seal ports to prevent contamination. Clean the reservoir and lines, then replace the filter. Manually prime the new pump with oil to prevent dry running. Tighten flange bolts to OEM torque to avoid leaks, and conduct an idle test run upon startup before gradually loading.

5. How do I troubleshoot abnormal noises and unstable pressure after installation?

Abnormal noises are often caused by air ingress or dry running. Check if oil priming and bleeding were thorough, the oil level is adequate, and suction lines are airtight. Unstable pressure is commonly due to clogged filters, stuck relief valves, or internal leakage. Inspect filters and clean relief valves sequentially.

6. How can I extend the service life of the AT331223 / AT317640 hydraulic pump?

Regular maintenance is key. Routinely check the oil level and quality, and replace hydraulic oil and filter elements as recommended (usually every 500–1000 hours). Avoid prolonged overload or overpressure operation, keep the system free of contaminants, and ensure the pump body is sealed during storage.

Product Detail

OEM AT331223 AT317640 Tandem Hydraulic External Gear Pump Replacement for John Deere Backhoe Loaders 310G, 310SG, 310SJ, 310SK, 310SL, 315 P, 315J, 315SG, 315SK, 315SL, 325J, 325SK Factory, Factories

Product Description

Related Products

Product Detail

OEM AT331223 AT317640 Tandem Hydraulic External Gear Pump Replacement for John Deere Backhoe Loaders 310G, 310SG, 310SJ, 310SK, 310SL, 315 P, 315J, 315SG, 315SK, 315SL, 325J, 325SK Factory, Factories

Product Description

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