ITW Dynatec
Chapter 5
Maintenance and Repair Notes
Page 42
Apex Slot Die Applicator, Manual #40-47, Rev. 10.16
Equipment Preparation for Maintenance & Repair
•
Adhesive processing equipment must be worked on while hot enough to soften any
material residue within the assembly. This depends on the type of adhesive used with
the equipment. This may require the system to be up to operating temperature before
disassembled, to prevent damage to fasteners and components.
•
Once disassembled, the individual parts may be cleaned by immersion in approved
solvent. Surface deposits may be removed by lightly scrapped with a brass device or
scrapper. Care must be taken not to damage sealing surfaces with sharp objects or
sand paper.
•
Components such as O-rings, fasteners and relief valves should be discarded and
replaced by certified ITW Dynatec replacement parts.
Re-Assembly Procedures and General Cautions
Unless noted, the re-assembly is simply the reverse sequence of the disassembly
procedures. However, the following “cautions” should be followed (whenever they apply)
for proper re-assembly:
CAUTION
In general, all O-RINGS AND SEALS must be replaced whenever hot-melt equipment is
re-assembled. All new O-rings must be lubricated with O-ring lube (PN N07588).
TAPERED PIPE THREADS are found on air pipe fittings used with the pump air supply
and on the outlet filter manifold. Apply thread sealant (PN N02892) whenever tapered
pipe threaded parts are re-assembled.
SOME FITTINGS used for adhesive on hot melt equipment have straight threads and O-
ring seals. Use of thread sealant is not necessary with these parts, but the O-ring seals
should be clean and lubricated. Tighten straight-threaded parts and fittings until their
shoulders are firmly seated. Excessive torque may damage straight-threaded parts and
the use of power wrenches is not recommended.
HOT-MELT RESIDUE must be cleaned from parts before they are re-assembled,
particularly from threaded parts. As a precaution against adhesive residue preventing
proper re-assembly, threaded parts must always be re-tightened at operating
temperature.
