KYB Hydraulic Pump PSVD2 21E 20 for Hitachi EX40 Yamaha YM55 Daewoo S50W 3 01.png

KYB Hydraulic Pump PSVD2-21E-20 for Hitachi Yamaha Daewoo EX40 YM55 S50W-3

Name: KYB Hydraulic Pump PSVD2-21E-20 for Hitachi Yamaha Daewoo EX40 YM55 S50W-3
SKU: 28389
Price: 2699.00 USD
Availability: InStock

$2,699.00

For Komatsu D41A-6 and D41E-6 bulldozers: an aftermarket new hydraulic gear pump, part number 705-52-21070 that converts engine power into the hydraulic flow and pressure that moves the boom, arm, bucket, swing and travel. Unit weight is about 15 kg.

Category: Hydraulic Pump Assembly

Description
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705-52-21070 Hydraulic Gear Pump is an aftermarket replacement hydraulic gear pump for Komatsu bulldozers, including D41A-6, D41E-6. The main hydraulic pump converts engine power into pressurized oil flow. Supplied by LIONKITS as aftermarket new with a 6-month warranty.

705-52-21070 Hydraulic Gear Pump Specifications

Product Type: Hydraulic Gear Pump
Part Number: 705-52-21070, 7055221070
Compatible Brand: Komatsu
Machine Type: Bulldozer
Condition: Aftermarket new
Product Weight: 15.000 kg/33.06 pounds(1 piece)
Warranty: 6 months
Brand: LIONKITS
Country of Origin: China

Komatsu Models Compatible with the 705-52-21070 Hydraulic Gear Pump

Komatsu Bulldozer D41A-6 D41E-6 D41P-6 D41E-6K D41E-6K D41PF-6

Your model is not listed? Contact LIONKITS via live chat or email with your machine model and nameplate photo, and we will confirm compatibility.

What Does a Hydraulic Pump Do?

The main hydraulic pump converts engine power into pressurized oil flow. That oil moves the boom, arm, bucket, swing and travel functions, so every machine movement depends on it. Because it takes the most punishment, it is usually the first major hydraulic component to wear out.

Signs the Part Needs Replacing

Slow or weak movement on all functions: when everything is slow at once, not just one circuit, the pump is the most likely source.
Whining, knocking or grinding noise: internal wear or cavitation, especially on start-up or when the oil is cold.
Hydraulic oil running hot: internal bypass leakage turns pressure into heat.
Metal particles in the filter or case drain: a failing pump sheds metal and pushes out more case drain flow.
Erratic or spongy movement, foamy oil: air entering the suction line, or aeration, upsets pump flow.

These symptoms overlap with clogged filters, low oil, air in the suction line and worn valves, so check the filters and oil level before replacing the part.

How to Order and Install the 705-52-21070 Hydraulic Gear Pump

Confirm your machine model, the part number and the pump model on your existing pump before ordering.
Send a photo of the old pump or the nameplate if you are not sure; LIONKITS will confirm fitment for you.
Change the hydraulic oil and the return filters before fitting the new pump; a new pump installed in contaminated oil will fail early.
If the old pump failed internally and shed metal, flush the tank, hoses and oil cooler and inspect the control valve and motors for contamination.
Fill the pump case with clean hydraulic oil and prime the pump as the service manual specifies before the first start.
Check the suction line, strainer and fittings for air leaks, and tighten bolts to the specified torque.
Run the machine at low speed first, then check pressure, noise and leaks.

Shipping, Payment and Support

Dispatch and delivery: Your package will be sent within 2-3 business days, and another 3-7 business days to arrive in your country
Payment methods: Credit Card, PayPal, T/T, Western Union
Returns and refunds: If you encounter any issues with the product, please contact us promptly and provide detailed feedback. We will handle the return or exchange promptly

Frequently Asked Questions

What is the 705-52-21070 Hydraulic Gear Pump?

The 705-52-21070 Hydraulic Gear Pump is an aftermarket replacement hydraulic gear pump for Komatsu bulldozers, supplied as aftermarket new under part numbers 705-52-21070, 7055221070.

Which Komatsu models does the 705-52-21070 Hydraulic Gear Pump fit?

It is listed for D41A-6, D41E-6. If you are unsure, send your machine nameplate to LIONKITS for confirmation.

How do I know my hydraulic pump is failing?

Typical signs are slow or weak movement on all functions, whining or knocking noise, hot hydraulic oil, metal particles in the filter or case drain and erratic or spongy movement.