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Cat hydraulic pump solenoid valves, such as common part numbers 1393990, 278-8744, and 627-2304, are
critical, high-quality components designed to control hydraulic pressure and flow in machines like the E320, E330, and 320D excavators. These solenoids adjust the pump swashplate and pilot system, ensuring precise, reliable machine operation and responsiveness.Key Features & Functions
- Application: Used for controlling hydraulic fluid output in Variable Displacement Axial Piston Pumps.
Common Symptoms of Failure
- Faulty Solenoid: Often indicated by error codes (e.g., code 358) and sluggish, unresponsive machine behavior, or failure of the bucket/functions to operate.
- Low Impedance: A failing solenoid may show a significantly lower resistance (e.g., 13 ohms) compared to the required 38-39 ohms.
- Hydraulic Leak: Physical, visible cracks in the brass actuator area of the valve, causing fluid to leak over the pump or machine.
Maintenance and Replacement
- Diagnostic: Check for electrical issues using a multimeter to measure impedance.
- Installation: Replace the solenoid if it is stuck, damaged, or leaking. Ensure connections are clean, as corrosion causes failure.
- Source: Parts are available from Cat dealers, or aftermarket sellers like FridayParts, LoaderPartsSource, and Amazon.
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278-8737: Solenoid Operated Hydraulic Pump Control Valve
Cat® Parts
https://parts.cat.com › catcorp › product
Cat® Parts
https://parts.cat.com › catcorp › product
This part is designed to fit your Cat equipment based on the manufacturer's specifications. Any changes to the manufacturer's configuration might result in the ...Read more
Caterpillar Cat E320 E330 E336GC Hydraulic Pump ...
Amazon.com
https://www.amazon.com › Caterpillar-Hydraulic-Propo...
Amazon.com
https://www.amazon.com › Caterpillar-Hydraulic-Propo...
Item Name · Solenoid Valve ; Item Number · 627-2304 6272304 ; Application · For Caterpillar Cat E320 E330 E336GC Excavator ; Tip · If you need any other parts, please ...Read more
Caterpillar Cat Hydraulic Pump Solenoid Valve 627-2304-01
eBay
https://www.ebay.com › itm
eBay
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Caterpillar Cat Hydraulic Pump Solenoid Valve 627-2304-01 ; Quantity. 1 available ; Item number. 405923739719 ; Est. delivery. Mon, Jan 26 - Mon, Feb 9. From SED, ...Read more
$205.46In stock$4.98 delivery
Hydraulic pump solenoid valve CAT 320 1393390
EXCAVATOR PARTS ONLINE
https://excavators-parts.com › hydraulic-pump-solenoid...
EXCAVATOR PARTS ONLINE
https://excavators-parts.com › hydraulic-pump-solenoid...
Hydraulic pump solenoid valve for CAT 320 1393390. For machines: CAT - CATERPILLAR. SKU: 139-3390. Manufacturer part number: 139-3390 1393390.Read more
€223.10
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Hydraulic Pump Solenoid Valve 096-5945 0965945 for ...
WorkPlatformsParts
https://www.workplatformsparts.com › products › hydra...
WorkPlatformsParts
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Hydraulic Pump Solenoid Valve 096-5945 0965945 for Caterpillar CAT Engine 3114 Excavator E70B E110B E120B E200B EL200B. Replacement Part Number: 096-5945, ...Read more
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RJQCUASF Cat Hydraulic Pump Solenoid Valve 627-2304-01
Amazon.com
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Amazon.com
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Buy RJQCUASF Cat Hydraulic Pump Solenoid Valve 627-2304-01: Solenoids - Amazon.com ✓ FREE DELIVERY possible on eligible purchases.
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xiamen doolin machinery co ltd
https://www.doolincm.com › cat-hydraulic-pump-solenoi...
xiamen doolin machinery co ltd
https://www.doolincm.com › cat-hydraulic-pump-solenoi...
The Cat excavator pump and proportional solenoid valve are crucial components of the excavator's hydraulic system. The pump is responsible for generating ...Read more
For CAT E320B E320C Hydraulic Pump Solenoid Valve KWE5K ...
eBay
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For CAT E320B E320C Hydraulic Pump Solenoid Valve KWE5K-31/G24YA30 121-1490 ; Item number. 397165734432 ; Country of Origin. China ; Brand. Vertextparts ; Accurate ...
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