511-0319/634-3426 MOTOR GP-PIS for CAT 374/374F/374F L

Features & Benefits

• Final Drive Travel Piston Motor: 511-0319 is a hydraulic travel piston motor designed to convert hydraulic energy into mechanical rotation for the excavator travel system.
• Piston Motor Group: 634-3426 is a variable-displacement piston motor group designed for the hydraulic requirements of CAT 374-series excavators.
• Hydraulic-to-Mechanical Power Conversion: Pressurized hydraulic oil acts on the motor pistons to generate rotational force that is transferred to the final drive system.
• High Torque Performance: The motor provides the torque required to move large excavators under heavy loads and challenging ground conditions.
• Smooth Travel Control: Efficient hydraulic power conversion supports controlled and responsive machine movement across different working surfaces.
• Heavy-Duty Construction: Cat specifies gray flake iron and ductile spheroidal iron for the applicable motor components, supporting durability in demanding operating environments.
• Application-Specific Design: Developed for CAT 374, 374F, and 374F L excavators to meet their hydraulic system and travel performance requirements.

Compatible Machine

The 511-0319 Final Drive Travel Piston Motor and 634-3426 Piston Motor Group are both listed by Caterpillar for CAT 374, 374F, and 374F L Excavators. The 511-0319 is specifically described as a final drive travel piston motor, while 634-3426 is identified as a variable-displacement piston motor group. Machine serial number and hydraulic configuration should be verified before ordering to ensure correct application.

Applications

• Mining
• Quarry
• Construction
• Heavy Earthmoving
• Large Infrastructure Projects

These piston motors are suitable for large excavators working in demanding digging, loading, earthmoving, material handling, and infrastructure applications where reliable travel power is essential.

Why Choose YLCM?

• 20+ Years Experience – Professional experience in construction and mining machinery parts.
• Large Warehouse – Extensive parts resources covering hydraulic, engine, drivetrain, electrical, and other machinery components.
• Fast Delivery – Efficient order processing for scheduled maintenance and urgent repair requirements.
• Genuine & OEM Parts – Genuine, OEM, and quality aftermarket solutions available according to customer requirements.
• Export to 60+ Countries – Supporting construction, mining, and machinery customers worldwide.
• Professional Technical Support – Assistance with part number verification, machine matching, replacement selection, and technical inquiries.

Packaging

The 511-0319 / 634-3426 piston motor assembly is professionally packed according to its structure and transportation requirements. Packaging options can include heavy-duty wooden cases, export-standard wooden crates, standard export cartons, shock-proof protection, moisture-proof protection, anti-rust treatment, and secure fixing where appropriate. Hydraulic ports and precision components are protected against moisture, contamination, impact, and handling damage during transportation.

Shipping

YLCM provides flexible international logistics solutions according to destination, order quantity, cargo characteristics, and delivery requirements:

• Sea Freight
• Railway Transportation
• Land Transportation
• Multimodal Logistics Solutions

For heavy hydraulic components, the transportation method can be arranged according to destination, cargo characteristics, delivery schedule, and customer requirements.

Frequently Asked Questions

Q1: What is 511-0319 used for?
A: 511-0319 is a Final Drive Travel Piston Motor that converts hydraulic energy into mechanical rotation to drive the excavator travel system.

Q2: What is 634-3426?
A: 634-3426 is a Piston Motor Group identified by Caterpillar as a variable-displacement hydraulic piston motor.

Q3: Which machines use these piston motors?
A: Caterpillar lists both part numbers for CAT 374, 374F, and 374F L Excavators.

Q4: What material is used for these motor components?
A: Cat specifies gray flake iron and ductile spheroidal iron for 511-0319, while 634-3426 is specified as ductile spheroidal iron.

Q5: How does a hydraulic piston motor work?
A: Pressurized hydraulic fluid acts on pistons inside the motor, converting hydraulic pressure and flow into rotational torque for the final drive system.

Q6: Is 511-0319 still available as an active Cat part?
A: Caterpillar currently marks 511-0319 as Discontinued and directs customers to a Cat dealer for replacement options. Supply availability should therefore be confirmed before ordering.

Q7: Can you supply other hydraulic parts for CAT 374?
A: Yes. YLCM can source hydraulic pumps, travel motors, swing motors, valves, cylinders, seals, hoses, and other hydraulic components according to the required part number.

Request a Quote

Looking for 511-0319 / 634-3426 Piston Motor Group for CAT 374, 374F, or 374F L? Send us the part number, machine serial number, required quantity, and preferred supply option. YLCM can help verify the application, check available supply options, provide the latest quotation, arrange export-standard packaging, and recommend suitable shipping solutions.