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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
AT331223 / AT317640 Dual External Gear Pump is the core hydraulic component for Deere 310G, 310SG, 310SJ, 310SK, 310SL, 315P, 315J, 315SG, 315SK, 315SL, 325J, 325SK series backhoe loaders. Its core value lies in direct OEM specification replacement, dual-path oil supply for composite high efficiency, durability and reliability, and rapid restoration of 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.
| Part Name | Hydraulic Pump | Part Name | 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 | ||
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Related Models |
AT334876/PG200235 | ||
| AT179792 | |||
| AT428960 | |||
| AT153470 | |||
| AT310590, AT440858, AT501973 | |||
| AT101453/AT163523 | |||
- Direct replacement, efficient installation: Interfaces and dimensions match OEM specifications, eliminating the need for additional machining or modifications, thereby reducing downtime for maintenance.
- Dual-path oil supply, composite efficiency: Twin-pump design with independent dual-path oil supply supports simultaneous multi-action operation, enhancing operational efficiency.
- Durable and reliable with easy maintenance: Compact gear pump construction with high impact resistance. Key components feature wear resistance, low maintenance costs, and suitability for high-frequency start-stop and variable load conditions.
- High cost-effectiveness: Aftermarket replacement parts cost less than new OEM pumps, balancing cost and reliability.
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1. Which John Deere backhoe loader models is the AT331223 / AT317640 compatible with?
Compatible with 310G, 310SG, 310SJ, 310SK, 310SL, 315P, 315J, 315SG, 315SK, 315SL, 325J, and 325SK—12 models in total. It is a direct replacement for the original equipment manufacturer (OEM) specification, with fully compatible interfaces and dimensions.
2. Is AT331223 / AT317640 an OEM part or an aftermarket part? How can they be distinguished?
AT331223 / AT317640 is an original manufacturer part number. It includes both new/remanufactured parts from John Deere and aftermarket replacements from third-party brands (e.g., CWL, Reliable Aftermarket Parts). Genuine parts feature the John Deere logo and dedicated packaging, while aftermarket parts often display “Direct Replacement for AT331223 / AT317640.”
3. What tools and accessories are required before installing AT331223 / AT317640?
Essential tools include a torque wrench (set per OEM specifications), socket set, lifting tools, hydraulic oil filling pump, and filter wrench. Prepare new hydraulic oil, compatible filter elements, and high-pressure seals (O-rings/gaskets). Simultaneously replace aged hoses/fittings to prevent secondary contamination.
4. What critical steps should be followed during installation to prevent failures?
Core steps: ① Drain hydraulic system pressure and seal ports to prevent contamination; ② Clean reservoir and lines, replace filter; ③ Manually prime new pump with oil to prevent dry running; ④ Tighten flange bolts to OEM torque to avoid leaks or uneven bearing load; ⑤ After startup, conduct an idle test run, gradually load to test dual-pump pressure and operation, checking for abnormal noises or leaks.
5. How to troubleshoot abnormal noises and unstable pressure after installing a new pump?
Abnormal noises are often caused by air ingress or dry running. Check if oil priming and bleeding were thorough, oil level is adequate, and suction lines are airtight. Unstable pressure is commonly due to clogged filters, stuck relief valves, or internal leakage. Sequentially inspect filters, clean relief valves, and test pump volumetric efficiency. Re-bleed or replace seals if necessary.
Performance and Maintenance Category
6. How to extend the service life of AT331223 / AT317640?
Routine maintenance: ① Regularly check oil level and quality; replace hydraulic oil and filter elements per specifications (recommended every 500–1000 hours). ② Avoid prolonged overload or overpressure operation. ③ Maintain system cleanliness to prevent contaminant ingress. ④ Ensure pump body sealing during storage to prevent moisture and corrosion.
Failure and Replacement Criteria
7. When should the AT331223 / AT317640 be replaced rather than repaired?
Prioritize replacement under these conditions: ① Pump body fracture, severe gear/shaft wear or seizure; ② Excessive internal leakage causing slow operation or pressure failure; ③ Continuous leakage due to seal failure where repair costs approach new pump price; ④ Core components (e.g., gears, bearings) deemed irreparable after professional inspection.
8. Can AT331223 / AT317640 be used on non-compatible John Deere models?
Not recommended. This pump's mounting interfaces, shaft diameter, and flow/pressure parameters are specifically matched to compatible models (310G, 310SG, 310SJ, 310SK, 310SL, 315P, 315J, 315SG, 315SK, 315SL, 325J, 325SK). Misuse may cause abnormal operation, system damage, or even safety incidents.