HPK055K pump output dropping or swashplate movement erratic on your ZAX120? A worn 335307 right swashplate support cradle allows the swashplate to tilt imprecisely, corrupting the piston stroke angle and degrading pump displacement control. RITO supplies this precision right swashplate support assembly to restore accurate displacement modulation on your ZAX120.
Item NO.:
335307Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock335307 Swashplate Support Assembly (Right / R) for Hitachi HPK055K / HPK060 piston pumps on ZAX120, ZAX120-2, ZAX120-3 and ZX120-5G excavators. The swashplate support cradle provides the curved bearing surface and pivot geometry that the swashplate rides on as the regulator changes pump displacement. Worn bearing surfaces cause swashplate stick-slip that disrupts servo control accuracy.
| Part Number | 335307 |
|---|---|
| Part Name | Swashplate Support Assembly (Right) |
| Compatible Brand | TONG MYUNG (Hitachi HPK055K / HPK060 Pump) |
| Applicable Models | ZAX120, ZAX120-2, ZAX120-3, ZX120-5G Excavator |
| Application | Right swashplate cradle bearing and pivot support in HPK055K / HPK060 variable piston pump |
| Material | High-strength alloy steel |
| Product Color | Silver machined finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Provides the bearing surface that enables accurate swashplate angle modulation in HPK055K / HPK060 |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Curved bearing surface ground to OEM radius and Ra 0.4 finish, eliminating the stick-slip that disrupts servo-controlled swashplate movement on worn HPK055K supports.
335307 right-side geometry is mirror-specific to 335308 left side; fitting the wrong side causes incorrect swashplate pivot clearance and servo instability.
335307 covers ZAX120, ZAX120-2, ZAX120-3 and ZX120-5G across HPK055K and HPK060 pump variants.
Right and left swashplate supports wear at similar rates; replacing both 335307 and 335308 together at one service event restores full servo displacement control.
FAQ
Q: What symptoms indicate the 335307 swashplate support is worn?
A: Pump displacement hunting at constant engine speed, sluggish response when load changes, audible stick-slip noise from the pump body during displacement adjustment, and irregular piston shoe wear patterns across the swashplate face.
Q: Can I replace only the right 335307 support without replacing the left 335308?
A: If the left support passes a visual and dimensional inspection, replacing only the worn right support is acceptable. However, if total pump hours are high, replacing both sides together eliminates the risk of the left side failing shortly after.
Q: Is 335307 right support interchangeable with 335308 left support?
A: No. They are mirror-image components. Fitting 335307 in the left position causes incorrect swashplate geometry and servo instability.
Q: How to confirm 335307 fits my ZAX120 HPK055K?
A: Verify pump model is HPK055K or HPK060 and the existing right support part number is 335307. Provide pump serial number for cross-reference.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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