HPV102FW pump leaking from the rear cover or rear bearing making noise on your ZAX120 or ZX130? A worn or cracked 314207 rear pump cover loses the bearing seat concentricity that protects the rotating group shaft, while a degraded O-ring allows case-drain oil to contaminate the engine compartment. RITO supplies this precision rear cover assembly to restore sealed, aligned HPV102FW pump casing.
Item NO.:
314207Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock314207 Pump Cover Assembly (Rear) for Hitachi HPV102FW piston pumps on ZAX120, ZX120, ZX130, ZX120-2 and ZX120-5G excavators. The HPV102FW rear cover seals the case-drain circuit and supports the rear shaft bearing. Precision-machined bearing seat and O-ring grooves maintain the structural alignment and sealing integrity required for reliable HPV102FW operation across the ZAX120-series duty cycle.
| Part Number | 314207 |
|---|---|
| Part Name | Pump Rear Cover Assembly (HPV102FW) |
| Compatible Brand | TONG MYUNG (Hitachi HPV102FW Pump) |
| Applicable Models | ZAX120, ZX120, ZX130, ZX120-2, ZX120-5G Excavator |
| Application | Rear casing cover and bearing seat for Hitachi HPV102FW main piston pump |
| Material | High-strength alloy steel casting |
| Product Color | Metallic grey |
| Working Temperature | -25°C~+80°C |
| Key Function | Seals HPV102FW case-drain circuit and supports the rear shaft bearing for shaft alignment |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Bearing seat bore machined to OEM H7 tolerance, maintaining rear shaft concentricity and protecting the HPV102FW rotating group from shaft deflection under pump operating loads.
O-ring groove dimensions machined to OEM specification for correct seal squeeze, eliminating case-drain leakage at the rear cover joint face under HPV102FW casing pressure.
314207 covers ZAX120, ZX120, ZX130, ZX120-2 and ZX120-5G, addressing the full production range of Hitachi ZAX120-class excavators using HPV102FW.
Confirmed for HPV102FW pump configuration; verify pump model before ordering as the ZAX120 series used multiple pump variants across production years.
FAQ
Q: What causes the 314207 rear pump cover to fail on ZAX120?
A: O-ring degradation from hydraulic oil additives or over-temperature operation is the most common cause. Housing cracking from impact, bearing seat fretting from a spinning outer race, and case-drain back-pressure spikes from a blocked drain line are secondary causes.
Q: Can I replace just the O-ring on 314207 instead of the full cover?
A: If the cover body and bearing seat are within OEM dimensional specification, O-ring replacement alone can stop the leak. Replace the full 314207 cover if the body shows cracks or the bearing seat bore is oversize from spinning outer race.
Q: What O-ring material is correct for the HPV102FW rear cover on ZAX120?
A: Use FKM (Viton) O-rings rated for hydraulic oil at 100 degrees C or above. Confirm O-ring size from the Hitachi ZAX120 service manual parts list for the HPV102FW pump.
Q: How to confirm 314207 fits my ZAX120 HPV102FW?
A: Match existing rear cover part number 314207 and confirm pump model is HPV102FW. Provide pump and machine serial numbers to our team 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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