Comprehensive Hydraulic Pump Rebuild Kit For Cat 303 And 303CR Mini Excavator With All Internal Overhaul Parts Built Tough For The Heavy Daily Grind And Runs Smoother Than Butter
✔️ Six core plates, ten plungers, exact seals, and three pins
This single pack hydraulic pump rebuild kit replaces worn internal components inside Caterpillar 303 and 303CR mini excavators. Mechanics grab this set during routine shop refreshes to stop fluid leaks and restore steady digging power without dragging the main hydraulic assembly off the machine.
✅ Direct replacement for pump numbers AP2D18-904-0 and AP2D189040✅ Cylinder block, valve plate, thrust plate, swash hanger, and ball guide
✅ Ten precision piston shoe plungers with dedicated retainer plate
✅ Three cylinder block pins and full sealing repair pack included
💡 How do fresh internal seals and precision plates restore proper flow rates on compact construction equipment?
Swapping out tired thrust plates and scored plungers instantly brings slow digging machines back to top performance.
- Pre-fitted replacement blocks and valve rings lock tight against heavy psi loads without extra workshop time.
- Straight drop piston shoes and pin kits slide right into original bores for zero measuring stress.
- Proper sealed gaskets trap abrasive dirt while delivering handy lever action during heavy trench work.