455-7978 4557978 hydraulic pump for Caterpillar 428F2 434F2 427F2 backhoe loader
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Product Name: Main Hydraulic Piston Pump Assembly
OEM Part Number: 455-7978, 4557978
Applicable Machines: Caterpillar CAT 428F2, 434F2, 427F2 Backhoe Loader
Product Type: Variable displacement axial piston hydraulic pump
Condition: Aftermarket New construction machinery spare part
2.Core Advantages
Aftermarket new variable piston pump made strictly according to OEM specifications, fully hydraulic bench tested before shipment
High precision cylinder block, piston and valve plate assembly, low internal leakage, stable power for digging, loading and stabilizer operation of F2 series backhoe loader
Closed center load sensing hydraulic system, automatically adjust flow to match working load, improve fuel efficiency
Premium sealing components, excellent heat resistance and anti-aging property, stable performance under continuous heavy-duty operation
Original mounting flange, splined shaft and oil port layout, direct bolt-on replacement without modification, reduce machine downtime
12-month warranty under correct installation and normal operating conditions
3.Technical Data
Pump Type: Variable displacement axial piston pump
Control System: Load sensing closed center control
Rated Working Pressure: 28 MPa
Peak Pressure: 35 MPa
Rotation Direction: Clockwise
Drive Shaft: Splined shaft
Mounting: CAT standard flange
Applicable Machine: CAT F2 series backhoe loader
4.FAQ
Q1: Which backhoe loader models fit 455-7978 hydraulic pump?
A1: Fits Caterpillar 428F2, 434F2, 427F2 backhoe loader.
Q2: Is this pump direct replacement for original CAT pump?
A2: Yes, all dimensions and hydraulic parameters comply with OEM standard for direct installation.
Q3: What is the warranty term?
A3: 12-month warranty for manufacturing defects with proper installation.