3
Scotch-Weld
™
Hot Melt Applicator PG II LT Owner’s
Manual
Aplicador por fusión al calor de Scotch-Weld
™
PG II
LT de 3M
™
Manual del usuario
Manuel de l’utilisateur – Applicateur d’adhésif
thermo-fusible PG II LT 3M
™
Scotch-Weld
™
Use only with 3M™ Scotch-Weld™ Hot Melt LM Adhesives
Úselo sólamente con adhesivos de fusión al calor Scotch-Weld™ LM de 3M™
À utiliser uniquement avec les adhésifs thermo-fusibles LM 3M™ Scotch-Weld ™
General Information
Important Safety Instructions..........................................................................1
General Information........................................................................................2
Set Up and Installation....................................................................................3
Operation.........................................................................................................5
Preventive Maintenance ..................................................................................7
Troubleshooting ..............................................................................................9
Repair Part Kits .............................................................................11
Repair Procedures .........................................................................................13
General Assembly (Schematic).....................................................................20
Electrical Control/Wiring Arrangement........................................................21
Flow Control .................................................................................................22
Accessories....................................................................................................23
Repair Service ...............................................................................................24
Important Notice ...........................................................................................24
Warranty and Limitation of Remedies..........................................................24
Limitation of Liability...................................................................................24
3M Sales Branches.........................................................................Back Cover
Important Safety Instructions
SAVE THESE INSTRUCTIONS
Read instructions thoroughly before operating or performing any maintenance on 3M™ Scotch-Weld™ Hot
Melt Applicator PG II LT.
!
Danger
Do not modify the plug provided with the 3M
Scotch-Weld Hot Melt Applicator PG II LT.
Improper grounding connection of the plug may
cause electrical shock. Check with a qualified
electrician or service person to determine whether
the plug is properly grounded.
!
Caution
Contact with molten adhesive or hot applicator tip
or metal components may cause burns. Wear heat-
resistant gloves and safety glasses when operating
or repairing the 3M Scotch-Weld Hot Melt
Applicator PG II LT.
!
Important
Do not connect 3M Scotch-Weld Hot Melt
Applicator PG II LT to air supply with air pressure
greater than 80 psi. Damage to the applicator may
result.
!
Caution
Use only an approved extension cord with 3M
Scotch-Weld Hot Melt Applicator PG II LT. Use of
improper extension cord may cause electrical shock.
Use an extension cord that complies with NEC
requirements and state and local electrical
requirements.
!
Important
!
Caution
Use 3M™ Scotch-Weld™ Hot Melt LM Adhesives
only. Use of other adhesives may damage the
applicator or result in hazardous conditions.
Disconnect air and electrical power and make sure
applicator is at room temperature before servicing
3M Scotch-Weld Hot Melt Applicator PG II LT.
Failure to disconnect air and electrical power before
servicing may cause electrical shock or damage to
the applicator.
1
© 3M 2006
General Information
READ INSTRUCTIONS THOROUGHLY BEFORE OPERATING OR PERFORMING ANY
MAINTENANCE ON 3M™ SCOTCH-WELD™ HOT MELT APPLICATOR PG II LT.
The 3M™ Scotch-Weld™ Hot Melt Applicator PG II
LT is designed to be a simple, reliable tool for
dispensing 3M™ Scotch-Weld™ Hot Melt LM
Adhesive Sticks.
!
Important
Use 3M Scotch-Weld Hot Melt LM Adhesives only.
Use of other adhesives may damage the applicator or
result in hazardous conditions.
When trigger (1) is pulled, the variable regulator (2)
allows air pressure into rear of the Speedloader stick
feed (3). Air pushes the piston (4), which advances
adhesive stick through applicator. As adhesive
advances, it passes through hard plastic insulating
sleeve (5) which acts as thermal barrier to keep
molten adhesive and heat in forward portion of the
applicator. The rest of the applicator stays cool.
As adhesive advances into the heat block, it is melted
and liquefied. With pressure from the solid adhesive
sticks and the piston, the liquid adhesive is forced out
of the applicator through the nozzle tip (6). When the
trigger is released, air pressure is released from the
rear of the loading chamber. Pressure on the molten
adhesive in the front of the applicator is then also
relieved. Spring tension in the nozzle valve retracts
the valve, neatly cutting off the adhesive flow.
The delivery rate of molten adhesive for the 3M
Scotch-Weld Hot Melt Applicator PG II LT is
approximately six pounds per hour with 3M™
Scotch-Weld™ Hot Melt Adhesive 3762-LM utilizing
the standard tip 9921. Adhesive flow rates will vary
with the different 3M adhesives in the line and the
nozzle tip you choose.
It is self-contained and hand held, designed for multi-
station or intermittent manual adhesive application.
The 3M Scotch-Weld Hot Melt Applicator PG II LT
uses electric heat to melt the adhesive, and air
pressure to deliver the adhesive. Adhesive
temperature is automatically maintained by a fixed
thermostat on the heat block. The system is further
protected by a thermal cutout (TCO), which acts as a
thermal fuse.
Please take time to properly fill out and return
your 3M Scotch-Weld Hot Melt Applicator PG II
LT Warranty Card.
© 3M 2006
2
Setup and Installation
1. Remove the 3M™
Scotch-Weld™ Hot Melt
Applicator PG II LT from its
shipper and inspect for obvious
damage.
2. Connect Air and Electrical
Service
Select a work station where 120 VAC grounded
receptacle and compressed air service are
available.
Grounding Instructions
The 3M Scotch-Weld Hot Melt Applicator PG II LT
must be grounded. If it should malfunction or break
down, grounding provides a path of least resistance
for electric current to help reduce the risk of
electrical shock. This applicator is equipped with a
cord having an equipment-grounding conductor and
grouding plug. This plug must be used with
appropriate outles that are properly installed and
grounded in accordance with all local codes and
ordinances.
The 3M Scotch-Weld Hot Melt Applicator PG II LT
is designed for use on a nominal 120-volt circuit and
has a grounding plug as shown in illustration above.
Make sure the applicator is connected to an outlet
having the same configuration as the plug. No
adaptor should be used.
3
!
Danger
Do not modify the plug provided with the 3M
Scotch-Weld Hot Melt Applicator PG II LT.
Improper grounding connection of the plug may
cause electrical shock. Check with a qualified
electrician or service person to determine whether
the plug is properly grounded.
Electrical outlet should be as close to air supply
as possible.
Filtered air regulated to 80 psi
maximum is vital to optimum operation.
Important
!
Do not connect 3M Scotch-Weld Hot Melt
Applicator PG II LT to air supply with air
pressure greater than 80 psi. Damage to the
applicator may result.
Refer to step 3 on page 4 for air filter and
regulator installation procedure.
Connect air hose using two 1/2’’ open-end
wrenches. Remove the steel swivel portion of the
connector and insert the steel swivel into 1/8’’
female pipe thread air source. Insert and tighten
the brass fitting into the swivel and snug up all
fittings.
© 3M 2006
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