Part Name: Pin 1545278
Part Number: 1545278
Basic Info.
| Part no. | 1545278 | Material | Steel |
| Type | Pin | Part Type | Engineering machinery parts |
| Compatibility | Caterpillar | Transport Package | Wooden box |
| Trademark | DIRON | Origin | Luoyang City |
| HS Code | 84099991 | Production Capacity | 5000PCS/Year |
Product Details
- Date First Listed：2025/11/22
- Manufacturer：Diron Parts
Product Description
- Part Type：Pin
- escription: Replacement Part Pin 1545278 Suitable for Caterpillar, New
The 154-5278 is a premium-quality aftermarket boom to stick (dipper arm) pivot pin engineered as a direct, fully interchangeable replacement for the original Caterpillar® part number 1545278 (154-5278). This heavy-duty linkage pin forms the primary connection between the boom and the stick on 400-series backhoe loaders, enduring extreme digging forces, shock loads, and constant cyclic stress in trenching, loading, and material handling operations.
Key Features & Benefits
- Precision machined from high-strength 4140 alloy steel with induction hardening for superior toughness and fatigue resistance
- Thick hard-chrome plating available for outstanding wear and corrosion protection in harsh environments
- Exact OEM geometry and tolerances – true drop-in replacement, no modifications required
- Integrated grease grooves and lubrication channels for easy maintenance and reduced friction
- Exceptional shear and bending strength to handle maximum crowd and breakout forces
- Cost-effective alternative delivering OEM-equivalent performance and extended service life
Common Applications (Caterpillar® Compatibility)
- Backhoe Loaders – boom to stick (dipper arm) pivot: – 416D, 416E, 416F, 416F2 – 420D, 420E, 420F, 420F2, 420XE – 422E, 422F, 422F2 – 424D, 428D, 428E, 428F, 428F2 – 430D, 430E, 430F, 430F2 – 432D, 432E, 432F, 432F2 – 434E, 434F, 434F2 – 442D, 442E, 444E, 444F, 444F2 (select configurations)
- Critical high-load component in the backhoe front linkage of these popular and widely used machines
- Commonly replaced during major linkage rebuilds in construction, utility, and rental fleets worldwide
Technical Specifications
- Part Number: 154-5278 (aftermarket equivalent to Caterpillar® 1545278)
- Type: Boom to stick pivot pin (linkage pin)
- Material: Heat-treated alloy steel (hard chrome plated on select versions)
- Outside Diameter: 50 mm (1.97 in)
- Overall Length: 323 mm (12.72 in)
- Weight: Approx. 8–9 kg (18–20 lb)
- Quantity per machine: 1
- Common Related Parts: Seals (e.g., 166-1487 or 133-6682 kit), shims, locking plates, collars
The 6S-3466 is a high-quality aftermarket straight dowel pin designed as a direct, dimensionally identical replacement for the original Caterpillar® part number 6S3466 (also referenced as 6S-3466). Manufactured from premium-grade hardened steel, this precision-machined dowel pin ensures accurate alignment and secure location of components in engine and powertrain assemblies, delivering reliable performance in demanding heavy-equipment applications.
Key Features & Benefits
- Precision engineered to exact OEM specifications for perfect fit and function
- Made from high-strength alloy steel with consistent hardness throughout
- Smooth surface finish minimizes wear on mating parts
- Excellent shear strength and resistance to deformation under high loads
- Cost-effective alternative that meets or exceeds original performance standards
- Direct drop-in replacement – no modifications required
Common Applications (Caterpillar® Compatibility)
- Primarily used in Caterpillar® 3304 and 3306 series diesel engines (PC and DI configurations)
- Camshaft and timing gear location/alignment
- Flywheel housing and cylinder block doweling
- Various accessory drive and powertrain components
- Popular in classic Cat® machinery including: – D6D, D7G dozers – 966C, 966D, 966E wheel loaders – 225 excavators – 627 scrapers – Marine, genset, industrial, and on-highway truck installations
Technical Specifications
- Part Number: 6S-3466 (aftermarket equivalent to Caterpillar® 6S3466)
- Type: Straight dowel pin
- Material: Heat-treated alloy steel
- Diameter: 12.7 mm (0.500 in)
- Length: Approximately 38.1 mm (1.50 in)
- Tolerance: Precision ground to OEM standards
- Quantity per engine: Multiple (typically 2–4 depending on arrangement)
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.
