Alternator bearings are subjected to high rotational speeds, continuous belt tension, and intense engine vibration. While they require a reliable structural bond to prevent spin-out, they must also allow for future disassembly during alternator service or repair. This demands a retaining compound that provides robust structural support while offering easier serviceability than a permanent, high-strength compound.
The optimal solution is a retaining compound engineered for secure, yet removable, retention.
INCURE WeldLock™ 338 Retaining Compound (Yellow)
The INCURE WeldLock™ 338 Retaining Compound is the ideal solution, designed for press or slip-fit applications where future disassembly is required. It provides the necessary structural holding power for alternator operation while minimizing the torque needed for removal during maintenance.
| Key Feature | Performance for Alternator Bearings |
| Serviceable Bond (Yellow) | Specifically designed for assemblies requiring removal or repositioning. It secures the bearing against operational forces but allows for non-destructive removal when the alternator needs to be serviced. |
| Excellent Vibration Resistance | Provides reliable holding power against continuous engine vibration and dynamic belt tension, preventing bearing walk-out or damage. |
| Gap Fill (Up to 0.25mm) | Effectively fills the annular space between the bearing outer race and the alternator housing, eliminating internal micromovement. |
| Temperature Resistance (150∘C) | Maintains integrity under the heat generated by the engine and the alternator’s electrical operation. |
Application Steps: Installing Alternator Bearings
For optimal performance and reliable retention of the alternator bearing, follow these steps:
1. Surface Preparation (The Foundation)
- Clean: Thoroughly clean the alternator housing bore and the bearing’s outer race. Surfaces must be free of all grease, oil, and old threadlocker/retaining compound residue. Use an industrial cleaner or solvent (e.g., acetone) and wipe dry.
- Activate (If Needed): If using passive metals (like stainless steel or plated parts) or if the ambient temperature is below 15∘C (59∘F), apply a chemical activator to the bond surfaces and allow it to flash off completely.
2. Product Application
- Apply: Apply a continuous, thin bead of WeldLock™ 338 around the full circumference of either the outer race of the bearing or the internal bore of the alternator housing.
- Ensure Coverage: For optimum retention, ensure the adhesive completely wets the entire mating surface.
3. Assembly and Curing
- Assemble: Immediately slide or press the bearing into the housing bore. Ensure the components are aligned correctly, as the compound begins to cure quickly.
- Wipe Excess: Remove any excess adhesive visible outside the joint immediately after assembly.
- Cure: Allow the assembly to fixture before handling (typically 10-30 minutes). Allow a full 24 hours for the compound to reach maximum strength before placing the alternator back into service or subjecting it to high load.