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3M Scotch-Weld PG II LT, Owner'S Manual

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3M Scotch-Weld PG II LT Owner'S Manual Download Page 16

© 3M 2006

14

Repair Procedures

First follow “Handle Disassembly Instructions,”
Procedure A on page 13. Then remove the two large
Phillips head screws to the rear of the wire terminals on
the right hand side of the handle. This allows the
regulator assembly to swing free, connected only by
the hose going from the brass rear of the regulator to
the loading chamber assembly, and then main hose
assembly. Remove the main hose by unscrewing the
elbow fitting from the regulator.  Use a 5/16’’ wrench
to remove the loading chamber hose from the regulator.
Reassemble with a new regulator using reverse
procedure. Be sure hose fittings are quite snug. Check
for air leaks by activating the regulator. Once this is
done, reassemble the handle and heat shield.

B. Regulator Kit

Caution

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. 

!

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.

!

C. Valve Kit

3M Scotch-Weld Hot Melt Applicator PG II LT
must be warm prior to repairing nozzle valve. 

Nozzle valve assembly consists of the nozzle tip and
the nozzle valve. Remove the old valve assembly using
a 5/8’’ open-end wrench. Replace with new assembly.
Gently snug up the valve assembly. With a 1/2’’
wrench, also snug up the new tip.

D. Hose Kit

Follow “Handle Disassembly Instructions,” Procedure
A on page 13. Remove the main hose by unscrewing
the elbow fitting from the air regulator. Cut the cable
ties holding the power cord and hose assembly
together. Remove the hose and reconnect the new hose
using reverse procedure. Add new cable ties to the hose
and power cord.

Caution

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. 

!

Summary of Contents for Scotch-Weld PG II LT

Page 1: ...I 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 ...

Page 2: ... 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 General Information ...

Page 3: ...NEC requirements and state and local electrical requirements Caution 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 Caution Contact with molten adhesive or hot applicator tip or metal...

Page 4: ...rigger 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...

Page 5: ... 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 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 w...

Page 6: ...cotch Weld Hot Melt Applicator PG II LT air hose is 1 8 standard male pipe fitting 4 Install Bench Stand Prior to start up in operation set the bench stand on work surface so that tip of the applicator points away from work area when applicator is not in use When bench stand is in most desirable position fasten permanently using the screws provided If portability of the bench stand is desired simp...

Page 7: ...rward This will be visually evident by the forward movement of the retract knobs As the piston approaches the front of the chamber a whistling sound will be heard At this point the piston may be retracted and another adhesive stick will fall into place The applicator is again ready for operation Adhesive may be loaded into the chamber via the rear port at any time during operation thus saving time...

Page 8: ...tandard equipment Other tips available from your 3M Scotch Weld Hot Melt Adhesive distributor are shown on page 22 of this manual Note Disconnect air supply before changing tips Tips can be changed only when the applicator is hot You will need a 5 8 and a 1 2 open end wrench Hold the nozzle valve hex firmly with the 5 8 wench while removing the nozzle tip with the 1 2 wrench The accessory tip is m...

Page 9: ... gloves and safety glasses when operating or repairing the 3M Scotch Weld Hot Melt Applicator PG II LT 4 Be sure there is adhesive in the loading chamber 5 Under normal conditions allow at least 15 minutes for the applicator to warm up Note If proper shutdown procedure has not been followed see Preventive Maintenance After Operation page 8 up to one hour heat up prior to use may be required 6 Unde...

Page 10: ...eep sticks clean and free from airborne contaminants After Operation Before shutting down the 3M Scotch Weld Hot Melt Applicator PG II LT put the electrical switch in the off position Continue using the applicator until approximately one adhesive stick has been discharged Note If proper shutdown procedure has not been followed up to one hour heat up prior to use may be required Lubricate inside lo...

Page 11: ...r to ensure that it is not plugged with contaminants Disconnect in line filter from air hose Using a compressed air line blow compressed air through the filter in the reverse flow position If this does not increase air flow through the filter swivel filter should be replaced Check to see that electrical service is live and that lighted switch is in on position Remove nozzle valve and clean Run one...

Page 12: ...ly retract the piston fully and roll the applicator to one side so that the adhesive in the magazine will free itself Now push the knobs forward until the adhesive stick still in the chamber is contacted by the piston Roll the applicator back to its normal operating position and continue extruding adhesive until the whistle is heard or until the piston has traveled its full length as indicated by ...

Page 13: ...able Tie 1 9223 Valve Kit a Nozzle Tip 1 b Valve Assembly 1 of Items Kit Repair Part Kit Kit 9224 Miscellaneous Parts Kit a Heat Shield Screw Top 1 b Heat Shield Screw Side 2 c Heat Shield Screw 4 d Shim 2 e Electrical Connector Screw 9 f Connector Strip 2 g Handle Screw 4 h Regulator Screw 3 i Ground Wire Screw 2 j Hinge Pin 3 k Bail Screw 2 l Lock Washer for Bail 2 m Bail 2 9226 Dump Valve a Val...

Page 14: ...ted on the back cover of this manual Please note the serial number of your 3M Scotch Weld Hot Melt Applicator PG II LT before ordering part kits No of Scotch Weld Hot Melt Kit Applicators in Use Number Name 2 5 6 10 11 15 16 20 9200 Trigger Kit 62 9200 6921 8 0 0 1 1 9932 Heat Shield Kit 62 9783 9932 7 0 1 1 2 9204 Regulator Kit 62 9204 6922 8 1 1 2 2 9207 Power Cord Kit 62 9207 6947 8 0 0 0 1 993...

Page 15: ...t half of the handle is removed by removing the four Phillips head cap screws Next remove the electrical wiring from the terminal strip and re assemble these to the replacement right half handle Lift the switch out of its slot in the handle and replace it in the new handle Replace the trigger and trigger pin at this time Using reverse procedure reassemble the right handle half then the left Be sur...

Page 16: ...al shock or damage to the applicator 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 C Valve Kit 3M Scotch Weld Hot Melt Applicator PG II LT must be warm prior to repairing nozzle valve Nozzle valve assembly consists of the nozzle ...

Page 17: ... Melt Applicator PG II LT Failure to disconnect air and electrical power before servicing may cause electrical shock or damage to the applicator Follow Handle Disassembly Instructions Procedure A on page 13 Lift the switch from the slot in the right half of the handle The power lead can be unplugged from the power cord receptacle The other wires terminating in ring lugs should be removed from thei...

Page 18: ...inal strips With a suitable drift punch drive the old heaters out through the top of the heat block All four heaters should be replaced making sure to reconnect the wires in the proper places Refer to the Wiring Arrangement and Electrical Control diagrams page 21 Be sure that heaters are bottomed out in the heat block They should not stick out above the block more than 1 4 It may be necessary to g...

Page 19: ... heater is okay First remove heat shield Heaters need not be removed from the block Check in the following sequence left front right front right rear left rear To start the check remove only one wire from its connection on the terminal strip Place one probe from the meter on the connector of the wire that has been removed and with the other probe touch the matching connector on opposite side of th...

Page 20: ...e loading chamber The thermostat and TCO are assembled as a unit and are replaced as such no matter which component has failed The Quick Slide clips should be removed from the thermostat Remove the two screws holding the thermostat and pry the thermostat from the block Insert new thermostat Make sure the rear rim of the thermostat is slipped into the slot in the heat block before affixing screws T...

Page 21: ...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 If the original heat block is broken or needs replacement you may use the 3M factory refurbish program Please contact your distributor for information on our PG II LT equipment refurbish program ...

Page 22: ... Kit B 9204 Regulator Kit C 9223 Valve Kit D 9220 Hose Kit E 9207 Power Cord Kit F 9219 Switch Kit G 9220 Trigger Kit H 9932 Heat Shield Kit I 9222 Heater Kit J 9931 Thermostat TCO Kit K 9260 Speedloader Hose Assembly L 9226 Dump Valve Kit M 9935 Speedloader Chamber Assembly ...

Page 23: ... 3M 2006 21 General Assembly Electrical Control 20 Wiring System ...

Page 24: ... brass extension tip 9946 will allow for maximum control of all the 3M Scotch Weld Hot Melt LM Adhesives and substantially reduce initial surge This is accomplished at a decrease in flow rate Speed of movement is the preferred means to control flow In the event that this is inappropriate for your operation additional accessory tips are available Note DO NOT REDUCE AIR PRESSURE BELOW 40 PSI If low ...

Page 25: ... addition to the foot pedal unit Speedloader Magazine Feed for 3M Scotch Weld Hot Melt Applicator PG II LT The 3M Scotch Weld Hot Melt Applicator PG II LT can be modified into a semi automatic loading mode by the addition of the Speedloader Magazine Feed By simply pushing a lever to the rear the magazine feeds a new stick of adhesive into the melt chamber The magazine holds 12 3M Scotch Weld Hot M...

Page 26: ...NTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY ARISING OUT OF A COURSE OF DEALING CUSTOM OR USAGE OF TRADE This warranty does not cover routine maintenance normal wear and tear or damage resulting from accident misuse alteration corrosion lack of reasonable care service performed by an unauthorized repair service use of unauthorized replacement parts or accessories installat...

Page 27: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information 3M 9946 ...

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