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AT310590 / AT440858 / AT501973 transmission charge pumps serve as the "guardian angels" for backhoe loader transmissions. With perfectly matched interfaces and dimensions, no modifications are required, enabling maintenance personnel to quickly complete installation and removal, thereby reducing labor costs.
These transmission charge pumps deliver stable flow and pressure output, effectively preventing system cavitation and extending the lifespan of transmission components such as gears and clutches. Core value lies in OEM-spec direct replacement, stable oil replenishment, and high cost-effectiveness.
| Part Name | Hydraulic Pump | Product Type | Transmission Charge Pump |
|---|---|---|---|
| Part Number | AT310590, AT440858, AT501973 (Interchangeable parts with the same function) | ||
| Compatible Equipment | Backhoe Loader | Operating Temperature | -20℃ ~ 90℃ |
| Quality Standard | OEM Standard | Origin | China |
| Core Usage | Refill transmission hydraulic system, maintain operating pressure, cool components, lubricate gears/clutches, and prevent cavitation. | ||
| Applications | Municipal engineering, infrastructure, farmland improvement, high-frequency start-stop cycles, and variable load conditions. | ||
| Related Models Reference | AT334876/PG200235, AT179792, AT331223 / AT317640, AT153470, AT428960, AT101453/AT163523 | ||
Fully compatible interfaces and dimensions require no modifications, enabling technicians to complete assembly quickly, reducing labor costs.
Consistent flow and pressure output effectively prevent system cavitation, extending the lifespan of gears and clutches.
High-strength materials and precision machining withstand harsh conditions, offering strong resistance to contaminants.
High-quality aftermarket parts provide an excellent balance between cost and reliability compared to expensive OEM options.
| Model Range | Specific Models |
|---|---|
| AT310590 | 210LE, 210LJ |
| AT440858, AT501973 | 210G, 210P, 210K, 210K EP, 210L, 210L EP, 210LE, 210LJ, 310 P, 310J, 310K, 310K EP, 310L, 310L EP, 310SJ, 310SK, 310SL, 310SL HL, 310TJ, 310TK TMC, 315 P, 315J, 315SK, 315SL, 320 P, 325J, 325SK, 325SL, 410 P, 410J, 410K, 410L, 410TK TMC |
Yes, these three are interchangeable parts with identical functions and specifications, differing only by batch or sub-model compatibility. They fit a wide range of series backhoe loaders with identical installation interfaces.
Verify the part numbers (AT310590/AT440858/AT501973) against your machine's manual. Ensure the supplier provides quality assurance. High-quality aftermarket parts cost significantly less than original units while maintaining strict manufacturing standards.
Drain residual pressure from the hydraulic system, clean pipe connections and the oil tank. Crucially, replace the transmission fluid and filter elements to prevent contaminants from damaging the new pump.
Perform manual oil priming and air bleeding. Fill fluid through the filler port and rotate the drive shaft to expel air. Idle for 5-10 minutes to check for leaks or abnormal noises before applying full load.
Common causes include gear wear, seal aging, clogged filter elements, or air-locked inlet lines. Always check oil levels and filters first before disassembling the pump body.
Regularly replace transmission fluid and filters (recommended every 500-1000 hours). Inspect connections for leaks and avoid prolonged overload operation to prevent overheating damage.
