Basic Info.
| Part no. | 8M3368 | Material | steel |
| Type | VALVE CHECK FITS | Part Type | Engine Parts |
| Compatibility | Caterpillar | Transport Package | Wooden box |
| Trademark | DIRON | Origin | Luoyang City |
| HS Code | 84099991 | Production Capacity | 5000PCS/Year |
Product Details
- Item Model：4D2289
- Date First Listed：2025/11/25
- Manufacturer：Diron 8M3368
Product Description
- Part Number: 4D2289
- Part Type: VALVE CHECK FITS
- Description: VALVE CHECK FITS 8M3368 for Caterpillar
The 8M-3368 is a high-quality aftermarket one-way check valve manufactured as a direct, fully interchangeable replacement for the original Caterpillar® part number 8M3368 (8M-3368). This precision-machined brass/steel check valve is used in hydraulic control circuits to permit free flow in one direction while positively preventing back-flow in the opposite direction, protecting pumps, cylinders, and other components from pressure spikes and reverse flow.
Key Features & Benefits
- Robust brass body with hardened steel or stainless poppet for excellent durability and corrosion resistance
- Precision-ground sealing surfaces ensure 100% leak-free operation even at high pressure
- Cracking pressure approximately 0.3–0.5 bar (4–7 psi) – identical to OEM specification
- Direct drop-in replacement – same thread (9/16-18 UNF-2A), hex size, and overall length
- High flow capacity with minimal pressure drop
- Cost-effective alternative that meets or exceeds genuine Caterpillar performance
Common Applications (Caterpillar® Compatibility)
- Hydraulic control circuits on classic and mid-size machines including: – Wheel Loaders: 920, 930, 941, 951, 966C, 966D, 980B – Track-Type Tractors: D4D, D5B, D6C, D6D, D7F, D7G – Motor Graders: 12G, 14G, 120G, 130G, 140G – Excavators: 215, 225, 227
- Typically installed in: – Lift and tilt circuit anti-drift / holding valves – Steering and brake system protection – Ripper and implement control circuits
Technical Specifications
- Part Number: 8M-3368 (aftermarket equivalent to Caterpillar® 8M3368)
- Type: Inline hydraulic check valve
- Port Thread: 9/16-18 UNF-2A (ORB male)
- Body Material: Brass (natural finish)
- Poppet Material: Hardened steel or stainless steel
- Seal Material: Nitrile (Buna-N) O-ring
- Max Working Pressure: 350 bar (5000 psi)
- Cracking Pressure: ~0.35 bar (5 psi)
- Flow Capacity: Up to 80 L/min (21 GPM)
- Hex Size: 19 mm (3/4 in)
- Overall Length: ~48 mm
Important Note:
- We only provide replacement products intended for aftermarket use in the Caterpillar machinery listed above. The brand name Caterpillar is used solely as reference information to indicate compatibility and does not imply that our products are OEM.
- Note: While this description provides general information, specific details such as size, weight and exact material may vary by manufacturer and specific application. To obtain the most accurate and up-to-date information, it is recommended to consult a qualified parts supplier such as DIRON PARTS.
FAQ
Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We’ll show you the photos of the products and packages before you pay the balance.
Q3. What is your terms of delivery?
A: FOB
Q4. How about your delivery time?
A: Generally, it will take 20 to 30 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8. How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from
ABOUT DIRON
- Factory OF DIRON
Diron Parts Group Have Its Own Factory Ensure That We Offer Better Price For Customers. Besides, Diron Corporate With Some Reliable Principal Manufacturers, So Diron Also Supply Customer Other Quality Spare Parts.
- Team OF DIRON
With 18 years of manufacturing and exporting experience, Diron has a team of knowledgeable engineers, inspectors and technical workers, sales staff, after-sales personnel.
- Products OF DIRON
As a distributor, we supply parts covers for :Complete engines, Long block, Short block, Engine spare parts, Electricla products, Hydraulic products, Transmission products, Undercarridge products.Among them, Cylinder head, Cylinder block, Spacer-plate, Bushing & Pin are our best-selling products.
