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Caterpillar 312C S4K engine parts

Engine: CAT S4K
Structure: in-line 4-cylinder, four-stroke, water-cooled, mechanical direct injection, turbocharged
Displacement: 4.0L
Bore × stroke: 105mm × 118mm
Applicable models: Carter 312C, 311C excavators

Classification :

Engine System

Keywords :

Caterpillar 312C S4K engine parts

WhatsApp : +8615992458379

Email : sales@excviparts.com

PRODUCT DETAILS

1. Basic parameters

Model: Carter 312C

Engine: CAT S4K

Structure: in-line 4-cylinder, four-stroke, water-cooled, mechanical direct injection, turbocharged

Displacement: 4.0L

Bore × stroke: 105mm × 118mm

Applicable models: Carter 312C, 311C excavators

2. Details of overhaul accessories

1. Four packages

Piston 4 pieces

Dry cylinder liner 4 pieces

Complete set of piston rings

Piston pin, circlip

2. Large and small tiles

Main bearing bush (large bush) complete set (STD/large size)

Complete set of connecting rod tiles (small tiles)

crankshaft thrust plate

3. Valve assembly

4 intake valves

4 exhaust valves

Valve guide, valve seat

Valve oil seal, spring, locking plate

4. Crankshaft

Integral forged steel crankshaft

Including main journal and connecting rod journal

Suitable for large and small tile assembly, power core rotating parts

3. Common faults

Burning engine oil, large exhaust gas at the lower part: wear of four supporting components, aging of valve oil seals

Low oil pressure: wear of large and small tiles, strained crankshaft journal

Cylinder head leakage, unstable idling: loose valve seal, seat ring wear

Abnormal noise: Crankshaft wear clearance is too large

4. Maintenance reference data

Main bearing clearance: 0.040–0.100mm

Connecting rod shoe clearance: 0.035–0.090mm

Valve clearance: Intake 0.25mm Exhaust 0.35mm

QUALITY INSPECTION

Exquisitely manufactured with original technology and strict full-process quality inspection. High temperature and heavy load resistant, powerful, fuel-saving, stable and durable. Brand new genuine with complete certificates, direct factory supply, reliable warranty and professional after-sales technical support.

PACKAGING AND SHIPPING

Our products are well sold in China and exported to many countries, such as South Korea, Japan, Russia, Germany, Britain, Austria, Czech Republic, Hungary, Netherlands, Slovenia, Bulgaria, Egypt, Saudi Arabia, Iran, Kuwait, UAE, Turkey, Israel, Syria, Lebanon, Jordan, Yemen, Cyprus, Philippines, Vietnam, and Malaysia...

FACTORY APPEARANCE

For 18 years, we have focused on one mission:
to help our partners build core competitiveness and operate with complete peace of mind.
We are not middlemen.
With in-house inventory, direct sourcing from factories, and tiered pricing, we eliminate redundant middle layers, pass on greater profit margins to customers, and take stable delivery as our lifeline.
We understand well:
Your customers trust you because you never make mistakes.
Our mission is to make sure you stay flawless.
We take full responsibility for quality issues.
We guarantee stable supply.
We fight for every minute in delivery.
Our promise remains unchanged:
You focus on expanding the market.
Supply, quality, delivery, and after-sales support – leave everything to us.

Free Quote

CUSTOMER REVIEWS

Customer Reviews

All original parts are of standard specifications, with extremely high compatibility. Installation requires no modification, and the workmanship is exquisite and flawless, perfectly matching the original equipment.

Customer Reviews

The excavator chassis is solidly constructed, with wear-resistant tracks and smooth movement, adaptable to various complex construction site conditions. It has strong load-bearing capacity, is not easily deformed, and has a long service life.

Customer Reviews

Strict overall quality control ensures that all parts are brand new, genuine, and unrefurbished. Every part undergoes quality inspection and guarantees, offering significantly better value than other suppliers.

WHY CHOOSE US

Powerful and Fuel-Efficient

The original factory-engineered engine delivers ample power and strong acceleration, stable idling speed, and low fuel consumption, making it less prone to failure during long-term heavy-duty operation.

Precise Hydraulic Control

The well-balanced hydraulic system provides smooth and sensitive operation, coordinated complex operations, rapid response, and significantly improved work efficiency.

Robust and Durable Chassis

The thickened, wear-resistant chassis offers excellent load-bearing capacity and stable movement, adapting to various complex road conditions, including muddy and mountainous terrain, and resisting wear and deformation.

Stable Quality and High Compatibility

All machines and accessories undergo rigorous quality inspection, adhering to high standards of craftsmanship. Highly compatible, they are ready to use immediately after installation, with a low failure rate and long service life.

FAQ

Q：I want a specific size or color. Can I get my color coated steel customized?

A：Yes. Customization is available. You can choose the color or pattern, size (length, width, thickness, weight, etc.), paints, shape, etc. We offer coils and sheets, as well as further processing services, such as logo printing, etc. Please send us your requirements, we will meet your requirements.

Q: How about the MOQ? Will you accept it if my first order quantity is smal!?

A: We want to do our best to support your trial order quantity, so even for just a few kilograms of products,because we have confidence to continue the second order with your company.

Q: How long is your delivery time?

A: If the goods are in stock, generally 5-10 days. Or 15-20 days if the goods are not in stock, according to the quantity.

Q: How about samples? ls it free or extra cost?

A: Yes, we would like to provide samples before ordering; if thereis sample in stock, it wil be free; if the sample is from new production, we will charge some reasonable fees, butthis amount will be deducted from your first order invoice.

Q: How to pack?

A: Can be packaged according to customer's needs

Q: What are your payment terms?

A: New customers usually have two payment terms: 1) 30% T/T as deposit, 70% balance against copy of B/L; 2)100% irrevocable L/C at sight; lf you need any other terms, please feel free to contact us and we will try ourbest.

Engine System