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Systematics, Inc. West Chester, PA.  19380

13

WEEKLY

1. Remove dirt and dust from the

wire feed compartment.  Use low
pressure dry compressed air.

2. Remove dirt and metal deposits

from the grooves in the feed
roll.  If the grooves are badly
worn, the feed roll should be
replaced.  If the pressure roll
does not turn freely, it should
be replaced.

3. Check all gas fittings for

leaks.  Tighten or repair as
required.

EVERY SIX MONTHS

1. Disconnect the welder from its

main power supply.

2. Remove the machine’s side pan-

els.

3. Using low pressure dry com-

pressed air, remove dust and
dirt from all components.

4. Check for loose or frayed wir-

ing.  Particularly check welding
current wire connections.

5. Replace torch liner if neces-

sary.

RECOMMENDED

CUSTOMER SPARE PARTS

The Systematics PBE250 is a ma-

chine of proven design and relia-
bility.  Following is a list of
consumable items recommended as
spare parts for this unit.

contact tips ....... M3-T30, etc.
gas nozzles ............. M3T-N50
nozzle insulators ......... M3T-B
gas diffusers ............. M3T-D
steel liner(.020-.030) .. M103L-B
steel liner(.035-.045) .. M104L-N

In the event of the failure of any

part of this equipment,  contact
your Systematics representative
for replacement parts and service.

WARNING

DO NOT lift the unit when a gas
cylinder is installed or at-
tached.

DO NOT weld on any item that
has a common electrical
ground.

DO NOT operate the unit with
the side panels removed.
Overheating will occur.

DO NOT weld upon the case of
the welding machine.

ONLY a qualified electrician
should perform work inside the
welding machine.

ALWAYS wear protective cloth-
ing, leather gloves and a full
cover welding hood while weld-
ing.

DO NOT weld in a closed in
area.  Proper ventilation is a
necessity, or a fresh air
supplied hood should be worn.

W H E N   w e l d i n g   n e a r   c o m -
b u s t i b l e s ,   a   h e l p e r   o r
"watcher" should stand by with
a fire extinguisher or other
fire protective device.

NEVER weld on a closed vessel
or one that has contained
combustibles.

IF IN DOUBT - DON’T DO IT!

BE SAFE - DON’T BE SORRY!

MAINTENANCE (Cont.)

Summary of Contents for PBE250

Page 1: ...FINEST MIG WELDING SYSTEMS AVAILABLE TODAY THE PBE250REPRESENTSFOURTHGENERATIONTECH NOLOGICAL ADVANCEMENTS THIS SYSTEM IS DE SIGNED AND ENGINEERED TO PROVIDE YOU WITH YEARS OF PROFESSIONAL SERVICE IN...

Page 2: ...TIAL DAMAGES SO THE ABOVE LIMITA TIONS OR EXCLUSIONS MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY HAVE OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE ARC WELDING CAN...

Page 3: ...he electrode wire dips into the pool and causes a short circuit The short circuit current flow causes a rapid temperature rise in the electrode wire and the end of the wire is melted off An arc is imm...

Page 4: ...5 Argon 25 CO2 For Aluminum Bronze Argon For Stainless Steel Argon 2 Oxygen For Flux cored CO2 or Argon CO2 mix GLOBULAR TRANSFER Globular transfer occurs at the intermediate range of 22 to 24 arc vol...

Page 5: ...HICH ARE NOT PROVIDED WITH THE PBE250 1 Full cover welding helmet with proper colored lens shade 9 to 11 depending on operator s pref erence 2 Proper shielding gas and cylin der 3 Leather welding glov...

Page 6: ...N MAKE SURE POWER SOURCE IS UNPLUGGED BEFORE MAKING IN PUT SELECTION CHANGE OVER 3 Attached to the power source s contactor is one 2 two posi tion plug which allows easy selection of input voltages of...

Page 7: ...ng remove the drive roll turn it over and reinstall it on the shaft continued on following page B SIDE FACING IN FOR 023 035 STEEL WIRES C SIDE FACING IN FOR 040 045 STEEL WIRES AND 3 64 ALUMINUM WIRE...

Page 8: ...of the torch approximately six inches CAUTION Keep hands and face away from the front of the torch and do not allow the wire to contact the Work The wire is electrically HOT when the torch trigger is...

Page 9: ...same type and thickness as the material to be welded OPERATING SEQUENCE 1 Make sure that the pieces of metal to be welded are free of grease dirt paint and scale Use a wire brush to remove paint and s...

Page 10: ...J TORCH SELECTOR CABLE Plugs into positive terminal for standard welding operation or negative terminal for straight polarity welding on very light sheet metal or for using flux cored gasless wire K P...

Page 11: ...STICKOUT NOTE When welding steel the ideal position for holding the torch is inclined approximately 30 degrees towards the direction of travel This allows the arc to be seen easily resulting in great...

Page 12: ...any anti spatter material on the torch or base metal and DO NOT attempt to lubricate the aluminum wire in any way Weld contamination will occur unless the wire base metal torch and work area are kept...

Page 13: ...ooking at the arc 5 Activate the torch trigger to start the weld sequence When the timer switches off the weld current release the trigger but maintain firm contact between the torch and work Wait one...

Page 14: ...r This can cause wire feeding problems so a new liner should be installed OPERATING HINTS BURN BACK In the event the welding wire burns back into the contact tip 1 Remove the nozzle from the torch 2 U...

Page 15: ...this unit contact tips M3 T30 etc gas nozzles M3T N50 nozzle insulators M3T B gas diffusers M3T D steel liner 020 030 M103L B steel liner 035 045 M104L N In the event of the failure of any part of thi...

Page 16: ...k torch cable activated for continuity no response Loose or broken connection Check or repair on wiring harness connections Wire feed motor unplugged Plug in motor RC1 Faulty control transformer Check...

Page 17: ...shielding gas Replace tank trigger tank empty activated Loose or broken Tighten or repair no gas flow connections connections but contactor Faulty Gas solenoid Repair or replace operates valve GS valv...

Page 18: ...loser to work Poor connections Check and tighten all connections Faulty diode Test diodes replace D1 D4 faulty diode s See page 17 Heavy spatter Incorrect machine settings Increase heat decrease wire...

Page 19: ...If there is no continuity in either direction the diode is in open circuit condition and must be replaced If there is continuity in both direc tions the diode is in short circuit condition and must be...

Page 20: ...REQUIRED 1 Remove the top cover assembly from the unit 2 Locate the printed circuit board s 3 Referring to Figure 19 locate the trim resistor this is lo cated in the upper right hand corner of the wi...

Page 21: ...W M3 212 TRIGGER ADJUSTING SCREW ONLY M3 213 TRIGGER PIN M3 214 TRIGGER SPRING QUICK CONNECTOR GROUP M3 120 FERRULE M3 301A CONNECTOR HOUSING M3 305A CONNECTOR STEM M3 306 CONNECTOR PLUG WITH SETSCREW...

Page 22: ...t cable is 25 feet in length 35 foot and 50 foot cables are optional The wire speed control knob is built into the gun handle With the following options the MHG7 can also be used to weld steel or stai...

Page 23: ...24 Systematics Inc West Chester PA 19380 NOTES...

Page 24: ...Systematics Inc West Chester PA 19380 25 NOTES...

Page 25: ...26 Systematics Inc West Chester PA 19380...

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