Heavy casing vibration and internal knocking inside your ZX470 main pump indicate worn swashplate support races. Defective cradle seating causes alignment errors, destroying pistons and stalling mining shifts.
Item NO.:
820420Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time:
2-3 DAYSSecure rock-solid rotary stability with this high-precision ZX470 hydraulic pump support. Part 820420 provides an identical engineering fit to prevent costly pump rebuild failures.

| Part Number | 820420 |
|---|---|
| Part Name | Hydraulic Pump Swash Plate Cradle Support Assembly |
| Compatible Brand | Tongmyung |
| Applicable Models | ZX470, ZX450 Large Mining Excavators |
| Application | Excavator hydraulic system |
| Material | High‑strength Alloy Steel |
| Product Color | Matte Steel Grey / Protective Storage Oil Coating |
| Working Temperature | -25°C to 110°C |
| Key Function | Structural Support and Precise Angular Alignment for Variable Pump Swashplates |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Wooden Case/Reinforced Carton/Neutral Packing / Customized Box |

Reduce friction friction and metal wear between sliding parts to maximize pump lifespan.

Withstands extreme continuous cyclic shear stresses under high-tonnage heavy rock excavation shifts.

Ensures zero-tolerance seating for smooth swashplate movement and accurate displacement changes.


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