Need OEM quality 6222-31-1110 but don't want OEM prices? Our KOMATSU S6D108 crankshaft starts with 40Cr forgings from China's top 500 mill, then is finished, induction hardened and balanced on our own production line. It fits directly into PC300-5/6, PC360 LC-5, WA320-3, WA380-3, EG150 BS-5, and DENYO DCA180 kits to achieve the same fatigue life as the OEM while reducing costs.

Product Specifications

ENGINE NO	S6D108	Gross weight(kg)	74
OEM/PART NO	6222-31-1110	Length(mm)	974
Crankshaft Material	Forged steel 40Cr	Main journal(mm)	95
Engine type	diesel engine	Crankpin journal(mm)	70
Application		Stroke(mm)	130
Anti-rusty Coating	Yes	Hardness(HRC)	HRC52-58

Key Features

Forged Strength – Made from 40Cr forged steel, stronger than cast iron and less prone to fracture.
Hardened Journals – Induction hardening creates a layer of about 3–5 mm, reaching HRC 52–58.
Precision Machining – Journals ground to tight tolerances, reducing wear on bearings.
Dynamic Balance – Each crankshaft is tested to ensure smooth rotation with minimal vibration.
OEM Fitment – Matches Komatsu design standards, allowing direct replacement.

Quality Control

To guarantee stable performance, every KOMATSU S6D108 crankshaft goes through:

Ultrasonic and magnetic testing to check for cracks
Hardness and case depth inspection after heat treatment
Dimensional checks to verify journal size and roundness
Balance testing to keep residual imbalance very low

Inspection records are stored for each batch, and third-party certificates can be issued if requested.

KOMATSU S6D108 crankshaft ISO certification

Applications

Compatible models for KOMATSU S6D108 crankshaft：

Excavators: Komatsu PC300-5, PC300-6, PC360 LC-5

Wheel Loaders: Komatsu WA320-3, WA380-3

Motor Grader: Komatsu EG150 BS-5

Generator Sets: DENYO DCA180 powered by S6D108 engine

产品-1460-234

Packaging & Delivery

For KOMATSU S6D108 crankshaft:Packed in plywood or raw wood with rust-proof coating and plastic journal protectors. Stock units can usually be shipped within 2–3 days. Custom or bulk orders follow production scheduling.

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FAQ (Answering Common Questions)

Q: Does it really match the original Komatsu crankshaft with number 6222-31-1110?

A: Yes, it is made according to that OEM reference, so you can fit it in place of the original part without adjustment.

Q: Is this part cast or forged?

A: It is forged from 40Cr steel. Many clients prefer forged versions because they last longer and handle heavy loads better than cast ones.

Q: Can this KOMATSU S6D108 crankshaft be used in power generators?

A: Yes, it is suitable for generator sets such as DENYO DCA180 running on the S6D108 engine.

Q: Do you offer trial orders?

A: Yes, samples or small orders are accepted. Sample cost can be refunded with bulk purchase.

Q: What warranty do you provide?

A: All crankshafts are covered by a 12-month warranty against material and process defects.

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