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6 Care and Maintenance
All electrical and mechanical components of the Loctite
®
Hysol
®
Bulk-14 Hot Melt System should be visually
inspected for damage/wear prior to powering up the system each day. This inspection should include, but may not be
limited to, the following areas event of sub-assembly failures:
Inspect the melt tank for foreign materials and/or charring of the adhesive. Wipe off all excess adhesives from all
surfaces with purging compound.
Check the hoses, applicator, and nozzles for wear and assure integrity of all electrical connections.
Verify the hose is being properly supported so it is not over-stressed during use. The minimum bend radius is 8
inches (21 cm) when hot.
Look for leaks under the melt unit and at all mechanical connections.
Problems noted should be remedied prior to powering up the unit. The system should be purged with a flushing
agent when char build-up occurs or if the hot melt formulation is changed.
Warning!
Hot melt materials can cause severe burns resulting in disfigurement or blindness. Take the following precautions
before beginning any maintenance action:
1. Wear eye protection goggles, gloves, and protective clothing.
2. De-pressurize the supply hoses and applicator by shutting off the pump motor and firing the applicator either
manually or automatically into a disposal receptacle until no more adhesive is expelled through the applicator.
3. Allow the melt unit to cool down before beginning any maintenance.
4. Always disconnect hose/applicator electrical connectors before disconnecting mechanical fittings.
Notice
The part of the system being serviced should be heated to a temperature high enough to soften the adhesive prior to
dismantling, assembly or adjustment to prevent damage to mechanical components (i.e. hose/valve fittings, pressure
adjusters, tank lid, etc.).
Assure that power to the melt system is turned off prior to attaching any electrical connector to avoid arcing or
possible component failure.
6.1 Hose Replacement
Notice
Liquefied hot melt adhesive in the melt unit tank affords a potential burn hazard when attempting
to replace supply hoses. Be certain that all material in the tank has cooled before attempting this
maintenance action.
1. Turn off the melt unit circuit breaker and allow the adhesive in the tank to completely solidify.
2. Turn on the melt unit circuit breaker for five minutes to allow fittings to warm or heat fittings.
3. Turn off the melt unit circuit breaker and disconnect the melt unit’s electrical power.
4. Disconnect the supply hose electrical connector.
5. Tilt the melt unit backward far enough to access the adhesive manifold fittings. Loosen the supply hose JIC
fitting and remove the hose from the melt unit.
6. Install a new hose as specified in section 4.4.
