Retaining sleeves in hydraulic pumps are subjected to severe operating conditions: continuous high pressure, rapid cyclical loading, and constant exposure to high-temperature hydraulic fluid. The sleeve must be permanently secured to maintain internal alignment and sealing integrity. Any movement is an immediate cause of pressure loss, internal wear,and pump failure. This demands a non-negotiable High Strength, Permanent structural lock with excellent chemical resistance.
INCURE WeldLock™ 347 Retaining Compound (Green)
The INCURE WeldLock™ 347 Retaining Compound is the definitive choice. It provides a permanent, high-shear structural bond designed to withstand extreme dynamic loads, high pressures, and the superior thermal stability required in hydraulic systems.
| Key Feature | Performance for Hydraulic Pump Sleeves |
| High Strength, Fast Curing | Creates a monolithic bond that resists maximum pressure, shear stress, and cyclical fatigue, permanently locking the sleeve into the pump housing. |
| Temperature Resistance (175∘C) | Maintains full structural integrity under the sustained high temperatures generated by the hydraulic fluid and pump operation. |
| Ideal Gap Fill (Up to 0.15mm) | Perfectly secures standard press-fit sleeves, eliminating the microscopic clearances that cause fretting and internal fluid bypass. |
| Core Application | Suited for securing high-load rotating and static elements in mechanical drives, matching the severe demands of fluid power systems. |
Application Steps: Installing Retaining Sleeves
For maximum structural integrity and reliable, permanent retention of the sleeve, follow these steps:
1. Surface Preparation (The Foundation)
- Clean: Thoroughly clean both the pump housing bore and the sleeve’s outer surface. Surfaces must be absolutely free of all hydraulic fluid, oil, and contaminants. Use an industrial cleaner (e.g., acetone) and wipe dry.
- Activate (If Needed): For maximum cure speed, apply a chemical activator to the bond surfaces and allow it to flash off completely.
2. Product Application
- Apply: Apply a continuous, thin coating of WeldLock™ 347 around the full circumference of either the outer surface of the sleeve or the internal bore of the housing.
- Ensure Coverage: Ensure the adhesive completely wets the entire mating surface as the components are inserted.
3. Assembly and Curing
- Assemble: Immediately slide or press the sleeve into the housing bore. Ensure the component is fully seated and aligned correctly before the compound fixtures.
- Wipe Excess: Remove any excess adhesive visible outside the joint immediately after assembly.
- Cure: Allow the assembly to fixture before handling (typically 5 minutes). Allow a full 24 hours for the compound to reach maximum structural strength before introducing hydraulic fluid or subjecting the pump to pressure.