Stocked in Guangzhou — A complete camshaft bearing set for Isuzu 4HK1 and 6HK1 engines sits on the shelf today, ready for same-day dispatch to keep your Hitachi ZX series excavator out of downtime limbo.
Technical Specifications
| Parameter |
Value |
| Part Number |
8973861890 |
| Product Type |
Camshaft Bearing Set |
| Cross-Reference |
8-97386189-0, 8973569390, 8-97356939-0, 8973861891, 8976026990, 8-97386189-1, 8-97602699-0, 8943903110, 8943903111, 8-94390311-0, 8-94390-311-0, 8-94390311-1, 8-94390-311-1 (reference only) |
| Machine Fitment |
Hitachi ZX170W-3, ZX190W-3, ZX200-3, ZX210-3, ZX220W-3, ZX225US-3, ZX240-3, ZX250LC-3, ZX250LC-5B, ZX270-3, ZX280LC-3, ZX290LC-5B, ZX330, ZX330-3, ZX330-5G, ZX350-3, ZX350-5G, ZX350LC-5B, ZX350LC-5G, ZX360W-3, ZX400W-3, ZX500W, ZAXIS190W-5N, ZAXIS210-5A, ZAXIS250LC-6N, ZAXIS350LC-6N, ZAXIS370F-3 |
| Condition |
New Aftermarket |
| Compatible Engine Brand |
Isuzu |
| Engine Models |
4HK1, 6HK1, 4HK1-XZSA03, 4HK1-XZSA04, 6HK1 TIER3, UM6HK1 |
| Warranty |
3–12 months against manufacturing defects |
| Applications |
Excavator engine repair and overhaul for Hitachi ZX series machinery powered by Isuzu 4HK1 and 6HK1 engines |
Application Suitability
| Failure Symptom |
Replacement Urgency |
| Metallic knock from valve train at idle, worsening with RPM |
Immediate — camshaft scoring accelerates once bearing clearance opens |
| Low oil pressure reading after warm-up, no external leak visible |
High — bearing wear allows oil bypass, starving downstream galleries |
| Camshaft lobe wear visible during top-end inspection |
Scheduled — replace bearing set during head rebuild to prevent recurrence |
| Engine seized after oil starvation event |
Critical — full bearing set required before reassembly can begin |
What Arrives Before the Machine Can Move Again
A single camshaft bearing set is often the last part standing between a disassembled engine and a running machine.
I have watched repair bays sit occupied for days while one missing bearing set blocks the entire reassembly sequence. The block is stripped, the head is off, the crankshaft is measured and cleared — and then the top-end rebuild halts because the camshaft bearing set for a 6HK1 was not on the original order. The excavator sits on stands, the contractor loses production hours, and the workshop loses bay availability. [NEED_CITE: mobile equipment engine rebuild bottleneck parts availability]
The Camshaft Bearing Set in stock fast shipping replacement model exists to break that exact chain of events. When your Hitachi ZX330-3 is already torn down and waiting on this one component, availability matters more than catalog browsing.
Identification When the Nameplate Fails You
On jobsites where machines run multiple shifts and get pressure-washed weekly, engine nameplates disappear long before the engine itself needs attention. A worn or painted-over plate means no readable engine serial, and without that serial, distinguishing between a 4HK1-XZSA03 and a 4HK1-XZSA04 variant becomes guesswork. I once spent two full days exchanging blurry photos with a Hitachi ZX330-3 owner before we confirmed which camshaft bearing set his Isuzu 6HK1 actually needed.
Now, the confirmation process runs differently. Send a clear photograph of whatever remains — the engine block casting, the old bearing shell with its markings, the valve cover stamping — and the correct Camshaft Bearing Set for your Isuzu 4HK1 or 6HK1 is identified before anything ships. [NEED_CITE: Isuzu 4HK1 6HK1 engine variant identification methods]
Arrival Timing Quoted Before You Commit
Stock availability is confirmed at inquiry, not buried in a checkout flow. Once the correct camshaft bearing set is identified, you receive the estimated arrival window by each freight method — express courier for the machine-down emergency, air freight for a planned rebuild next week, or sea freight if cost matters more than speed. The timing is stated in the offer so you can decide based on your actual bay schedule.
The Guangzhou warehouse holds this Camshaft Bearing Set in stock fast shipping replacement inventory specifically because camshaft bearing failure is a common failure mode on Isuzu-powered Hitachi excavators. The part is not sourced on order; it is on the shelf and ready to move.

Why One-Piece Minimum Matters for Emergency Rebuilds
A repair centre pulling a 6HK1 apart for a top-end overhaul typically needs exactly one camshaft bearing set. There is no fleet-wide campaign, no scheduled batch replacement — just one machine, one engine, one set needed right now. Minimum order quantities that require three or five sets force a buyer to either pay for stock that will sit in a cabinet or delay the repair while searching for a supplier willing to ship a single unit.
This Camshaft Bearing Set ships from one piece with no MOQ penalty. The order size matches the repair.
Reading the Specs That Actually Affect Fitment
Bearing set compatibility on Isuzu 4HK1 and 6HK1 engines hinges on shell inside diameter and width tolerances matching the camshaft journal dimensions for your specific engine build. An engine that has been through a previous overhaul may have journals ground to an undersize, meaning a standard bearing shell will have excessive clearance and fail early. Conversely, a fresh block needs standard shells — an oversize set will bind the camshaft and cause immediate scoring.
The compatible engine list covers the full range of 4HK1 variants — from the 4HK1XASA02A through the 4HK1-XZSA04 — and the 6HK1 family including the 6HK1 TIER3 and UM6HK1. Each variant carries specific journal specifications that the bearing set must match. [NEED_CITE: Isuzu HK1 series engine camshaft bearing journal specifications]

The Cost of Getting the Bearing Set Wrong
A camshaft bearing set that arrives with the wrong shell dimensions does not just fail to fit — it creates a cascade. The engine is already stripped, the head is off, the machinist is booked. An incorrect bearing set means the reassembly halts, the bay stays occupied, and the machine remains non-productive while a replacement is sourced. On a mining or infrastructure site, that excavator being down for an extra week is measurable in lost cubic meters of earth that did not move.
A bearing set that physically fits but has incorrect clearance will run for a short period before oil pressure drops and the camshaft begins scoring the shells. The repair comes back, the head comes off again, and the labour cost doubles. Verification before dispatch eliminates both failure modes. [NEED_CITE: camshaft bearing clearance failure modes in diesel engines]
Why Buyers Source This Part Here
The Guangzhou warehouse stocks the Camshaft Bearing Set in stock fast shipping replacement inventory as a fast-failure item, not a special-order component. One-piece orders ship without MOQ friction. Part identification works from a part number, a machine model, or a photograph of a worn nameplate — whichever is all the buyer has when the machine goes down. Cross-reference verification covers the full range of superseded and alternate numbers including 8973569390 and 8943903110 so the correct set is confirmed before dispatch. Self-produced and sourced lines carry identical warranty terms, so the buyer gets one account and one accountability point regardless of which production line the set came from. The technical team confirms compatibility and grade before the part leaves the warehouse.
Documentation & Verification
- Commercial invoice and packing list with camshaft bearing set part number and engine model cross-reference
- Compatibility sheet listing verified cross-reference numbers for Isuzu 4HK1 and 6HK1 variants
- Quality inspection record covering bearing shell dimensions and surface finish check
- Warranty terms document specifying 3–12 month coverage against manufacturing defects
- Packing photographs showing bearing set sealed and protected before crate closure
- HS code and customs documentation support for destination-country clearance
Stock, Shipping & Arrival
- Camshaft bearing set confirmed in Guangzhou warehouse stock at time of inquiry
- Express courier dispatch available for machine-down emergencies with transit time quoted upfront
- Air freight option for planned rebuilds with estimated arrival by destination region
- Bearing shells individually wrapped and boxed to prevent transit scoring on journal contact surfaces
- Tracking number and arrival confirmation provided for all shipment methods
- Sea freight available for non-urgent restocking with container consolidation support
Frequently Asked Questions
Q: Do you have this camshaft bearing set in stock right now?
A: This Camshaft Bearing Set for Isuzu 4HK1 and 6HK1 engines is held in the Guangzhou warehouse as a stocked fast-failure item. Stock availability is confirmed at the time of your inquiry, not at checkout. If the set is on the shelf, it can dispatch the same day or next business day depending on when the inquiry arrives.
Q: Can I buy just one set — is there a minimum order?
A: Yes. The minimum order is one Camshaft Bearing Set with no quantity penalty. A single repair bay needing one set for a Hitachi ZX240-3 engine overhaul is the exact use case this stocking policy serves. You order what the job requires.
Q: How fast can it reach my jobsite or workshop?
A: Arrival timing depends on the freight method and your location. Express courier, air freight, and sea freight options are each quoted with estimated transit days in the initial offer. You choose based on whether the machine is already down or the rebuild is planned for next week.
Q: My nameplate is worn off — can I send a photo to confirm the right part?
A: Yes. Send a photograph of whatever identification remains — the engine block casting number, the old bearing shell markings, the valve cover stamping, or even the machine model plate if that is all that is legible. The correct bearing set is identified from the image before anything ships.
Q: What happens if the part arrives and doesn't fit?
A: Cross-reference verification runs before dispatch to match your engine variant against the bearing set specifications. The warranty covers 3–12 months against manufacturing defects. If a fitment issue arises despite verification, contact the team with photos of the received part and the engine journals for resolution.