How do I confirm pilotpart306921 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Pump Coupling Assy 4191663 For Hitachi Excavator EX310H-3C EX345USRLC EX350H-5 Main Hydraulic

For Hitachi Hydraulic Coupler

Hydraulic Coupler 4191663 for Hitachi

Q: What part numbers are associated with this Hydraulic Coupler?

4191663, EX310H-3C, EX345USRLC, EX350H-5, EX350H-5HHE, EX350K-5, EX345USR

OEM / REF: 4191663SKU: pilotpart306921

Pump Coupling Assy 4191663 For Hitachi Excavator EX310H-3C EX345USRLC EX350H-5 Main Hydraulic is a Hydraulic Coupler replacement part indexed for Part Number and Hitachi Excavator EX310H-3C EX345USRLC EX350H-5 Main Hydraulic Pump Coupling Assy 4191663, with 3 application records on file. Match OEM part number 419166...

Stock: In stock
Condition: New
Fitment: Hitachi Hydraulic & Pneumatic Parts
Category: Hydraulic Coupler

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$256.22USD/EA

~~$29,899.00~~Save 99%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Aug 10 – Aug 17
10	Aug 8 – Aug 15
50	Aug 6 – Aug 13

Estimates from today; confirm exact lead time before payment.

Quantity

Buy online now or add to your quote list for bulk pricing and fitment confirmation.

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Lead times can vary by freight route and customs. Contact support for expedited shipping.

Hydraulic Coupler Description

This Hydraulic Coupler is indexed for Part Number; Hitachi Excavator EX310H-3C EX345USRLC EX350H-5 Main Hydraulic Pump Coupling Assy 4191663; Hyd.Pump shaft to Engine Flywheel. Compare reference number 4191663 against the label on your existing Hitachi component before ordering.

Additional cross references on file: EX310H-3C, EX345USRLC, EX350H-5. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

4191663 EX310H-3C EX345USRLC EX350H-5 EX350H-5HHE EX350K-5 EX345USR

Applications

Part Number
Hitachi Excavator EX310H-3C EX345USRLC EX350H-5 Main Hydraulic Pump Coupling Assy 4191663
Hyd.Pump shaft to Engine Flywheel

Specifications

Part Number	4191663

Fitment Notes

Brand or application signal: Hitachi Hydraulic & Pneumatic Parts
Product family: Hydraulic Coupler
System category: Hydraulic & Pneumatic Parts > Connections > Hydraulic Coupler
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.