Construction Machinery SBS80 Hydraulic Spares E312C Swashplate Saddle E315D R/L Drive Shaft for CAT 312C 312D 315D Excavator
Welcome to our heavy machinery hydraulic supply center. We specialize in providing complete SBS80 hydraulic pump spare parts (including E312C swashplate saddle bearings, E315D right and left drive shafts, cylinder blocks, valve plates, piston shoes, and retainer plates), precision-manufactured as heavy-duty aftermarket replacement components compatible with Cater.pillar CAT 312C, 312D, 315C, and 315D excavators. Engineered to exact OEM tolerances, these spare parts restore system pressure, torque transfer, and operating efficiency under heavy digging loads.
- Hydraulic Pump Model: SBS80 Series Variable Displacement Axial Piston Pump
- Applicable Machinery Models: Fit for Cater.pillar CAT 311C, 312C, 312C L, 312D, 314C, 315C, 315D L Excavators
- Available Component Spares: E312C Swashplate Saddle Bearing, E315D Right/Left (R/L) Drive Shafts, Cylinder Blocks (R+L), Valve Plates (R+L), Piston Plungers, Ball Guides, Retainer Plates, and Pump Seal Kits
- Material & Metallurgy: High-frequency quenched alloy steel drive shafts, bronze-plated valve plates, and high-density ductile iron blocks
- Condition: 100% Brand New Aftermarket / Direct OEM Fit Interchangeable Spares
- Quality Testing & Warranty: 100% Hardness and Tolerance Inspection Tested, 6–12 months warranty included
Severe hydraulic wear degrades excavator cycle times and digging power. Overhauling your pump with our SBS80 replacement spares directly resolves these common hydraulic pump failures:
Cause: Deep scratches on the bronze valve plate or cylinder block face causing high internal fluid bypass.
Fix: Installing our precision-lapped SBS80 cylinder blocks and valve plates restores full hydraulic operating pressure.
Cause: Worn E312C swashplate saddle bearings preventing smooth displacement angle control.
Fix: Replacing worn saddle bearings and swashplate cradles ensures instant, smooth pump displacement control without lugging the engine.
Cause: Torque fatigue or spline wear on drive shafts caused by high-pressure digging impacts.
Fix: Installing our induction-hardened E315D R/L drive shafts restores rigid drive connection to the engine coupling.
Cause: Loose piston shoe sockets or worn retainer ball guides causing unstable piston stroke.
Fix: New precision piston shoes and retainer guide ball sets eliminate chatter and smooth hydraulic fluid flow.
Cause: Internal fluid leakage generation and degraded shaft seals due to high working temperature.
Fix: Restoring micron-level internal clearances reduces thermal oil recirculation and stops shaft oil leaks permanently.
Ideal for construction fleet maintenance, hydraulic repair workshops, and machinery technicians, these SBS80 spares excel in:
- CAT 12-to-15 Ton Excavator Main Pump Overhaul: Direct replacement parts for SBS80 pumps on CAT 312C, 312D, and 315D.
- Earthmoving & Trenching Operations: Restores boom, stick, and bucket speed under continuous digging cycles.
- Cost-Effective Maintenance: Economical rebuild alternative compared to purchasing a complete new OEM pump unit.
Q: Where can I buy replacement hydraulic spares for a CAT 312C SBS80 hydraulic pump?
A: You can purchase complete SBS80 hydraulic pump spare parts (swashplate saddle, R/L drive shafts, cylinder block, valve plate) directly from us. We stock OEM-interchangeable components for Cater.pillar excavators.
Q: Are E312C and E315D SBS80 pump drive shafts interchangeable?
A: The SBS80 pump uses left and right drive shafts. While SBS80 shafts fit both 312C and 315D series, spline teeth counts and shaft lengths should be cross-checked with your old shaft before ordering.
Q: Are these SBS80 cylinder blocks and valve plates ready for immediate assembly?
A: Yes, all valve plates and cylinder blocks are precision ground and lapped at the factory for immediate drop-in fitment without further machining.
