Description
The PAI FBG-4963 is a premium aftermarket spring eye bushing designed for Mack CH, CL, MH, and RW series trucks equipped with 3-1/2″ wide front leaf springs. Manufactured by PAI Industries with a focus on durability and precise fitment, this bushing provides the critical cushioning between the spring eye and mounting hardware to absorb road shock, reduce vibration, and maintain proper suspension geometry. Backed by PAI’s 2-year unlimited mileage warranty.
Signs You Need a New Spring Eye Bushing
- Clunking or popping noises when turning, braking, or driving over bumps
- Loose or vague steering feel, especially during cornering
- Excessive play or movement in the front suspension
- Uneven or premature tire wear on the front axle
- Visible cracking, dry rot, or deterioration of the bushing rubber
- Spring pin appears off-center or wallowed out in the spring eye
- Squeaking or creaking noises from the front suspension
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | FBG-4963 |
| Part Type | Spring Eye Bushing |
| Vehicle Compatibility | Mack CH, CL, MH, RW Series |
| Spring Width | 3-1/2″ Wide Springs |
| Length | 6.75″ (171.5 mm) |
| Outside Diameter | 1.894″ (48 mm) |
| Material | Rubber / Steel |
| Warranty | 2-Year Unlimited Mileage (Genuine PAI) |
Cross References
This part replaces or is equivalent to the following part numbers:
- Mack: 10QK254M2, 10QK254M, 25171650, 9000-375902, 4000-375902, 1394-375902
- Dayton Parts: RB-189
- Automann: MR624
- Dyco: DT1950
- Flagg: RB189
- Gaff: 12041
- Atro: SP62-1154
Applications
This spring eye bushing fits the following Mack truck models with 3-1/2″ wide front leaf springs:
- Mack CH Series (CH600, CH612, CH613)
- Mack CL Series (CL600, CL700, CL713)
- Mack MH Series (MH600, MH603, MH613)
- Mack RW Series (RW600, RW700, RW713 Superliner)
Note: Spring eye bushings are typically replaced in pairs. Installation may require a press or specialized installation tool. Verify your spring width and mounting configuration before ordering to confirm fitment.
