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MAINTENANCE AND SERVICE

Introduction

90% of the problems with MIG welders are wire feed/welding
gun related.  98% of these problems are due to owner/operator
abuse, misuse or ignorance.

The welding gun is exposed to the heat and spatter of welding.
The NOZZLE SPRAY (Part #12021) should be sprayed on the
inside of the gas nozzle, contact tip and swan neck with every
use.  The function of the nozzle spray is to prevent the spatter
from adhering to the gas nozzle, contact tip and swan neck,
making it easy to keep these parts clean.  However, using the
spatter spray does not eliminate the need to frequently clean the
spatter from the gas nozzle.  For this reason, HTP has available
a NOZZLE REAMER (Part #12025).  The nozzle reamer
makes it very easy to keep your tips and nozzles clean.

Figure 9 shows the early symptoms of spatter build up.  The
exterior of the nozzle has arc marks on it from shorting out.
You will also notice the nozzle sticking to the work and
inconsistent weld quality when the nozzle shorts out.

Figure 10 shows a cutaway of a nozzle with spatter build up.
This nozzle is ruined because the operator allowed the spatter to
build up excessively, so the spatter has now welded itself to the
inside of the gas nozzle.

Here are some good rules of thumb to help you select the
correct filler metal:

1) ER70S-6 is generally used for mild steel welding.

2) ER70S-2 is highly recommended for welding 4130 

chrome-moly tubing in many applications. 

3) ER80S-D2 is recommended for welding 4130 chrome-moly 

tubing if a higher strength, less ductile weld is required.  If 
your weld will be heat treated to obtain optimum strength, 
then use a filler metal which matches the chemistry of your 
tubing, which neither 70S-2 nor 80S-D2 wires do.

4) Generally speaking, use a 1/16" diameter filler rod for 

applications where the material is 1/8" and less.  Use a 3/32" 
diameter rod for 1/8" and thicker.

The following Filler Rod is available from HTP in 1 lb. tubes
which are tightly sealed to prevent oxidation.

Filler Rod
Part #

Material

308L-035-1

308L Stainless Steel Wire - .035" x 36"

308L-1/16-1

308L Stainless Steel Wire 1/16" X 36"

70S6-1/16-1

ER70S-6 Steel Wire 1/16" X 36"

70S6-3/32-1

ER70S-6 Steel Wire 3/32" X 36"

70S2-1/16-1

ER70S-2 Steel Wire 1/16" X 36"

80SD2-1/16-1

ER80SD-2 Steel Wire 1/16" X 36"

Nozzle Reamer

16

ARC WELDING WITH YOUR  MTS 160

You can arc weld with your MTS 160 if you have purchased the
optional electrode holder # 22315-ARCMTS.  If you will be
welding Electrode Negative (Straight Polarity) insert the
electrode holder into the negative output receptacle and the
ground cable into the positive output receptacle.  If you will be
welding Electrode Positive (Reverse Polarity) insert the electrode
holder into the positive output receptacle and the ground cable
into the negative output receptacle.

Make sure material you are
welding is clean, and attach the
ground cable to the workpiece.
Select the correct rod type,
diameter and amperage for 
your application. (See Chart E1)

To strike the arc, drag the
electrode across the work as if
you were trying to strike a match.
Lift the electrode off the work
slightly.  If the electrode sticks to
the work, give it a sharp twist to
break it free.  If the arc goes out
after it has started, you have lifted
the electrode too high off the
work.  Try to incline the electrode
at a 10 deg to 30 deg angle from
perpendicular in the direction of
motion.

40

50

60

70

80

90 100 110 120 130 140 150

6010

EP

DEEP

ALL

3/32"

1/8"

5/32

6011

EP

DEEP

ALL

3/32"

1/8"

5/32

6013

EP,EN

LOW

ALL

3/32"

1/8"

5/32

7014

EP,EN

MEDIUM

ALL

3/32"

1/8"

5/32

7018

EP

LOW

ALL

3/32"

1/8"

5/32

7024

EP,EN

LOW

FLAT

3/32"

1/8"

308L

EP

LOW

ALL

3/32"

1/8"

5/32

Electrode Selection and Amperage Range

Amperage Range

Electrode

Polarity

Penetration

Position

Diameter

Chart E1

Summary of Contents for MTS 160

Page 1: ...MTS 160 Owner s Manual HTP America Inc 3200 Nordic Road Arlington Heights IL 60005 4729 1 800 USA WELD 847 357 0700 FAX 847 357 0744 www usaweld com...

Page 2: ...er the discovery actual or construction alleged breach of warranty specifying the claimed defect HTP America Inc has reserved the right to make changes in design or add any improvements to its product...

Page 3: ...ur new HTP MIG Welder will deliver years of trouble free service However it is very important that you read the following manual completely Safety Suggestions ELECTRIC ARC WELDING PRODUCES ULTRA VIOLE...

Page 4: ...Note the welding wire will only feed with the side panel closed 5 Post Gas Flow The post gas flow is adjustable from 1 sec to 4 sec Post gas flow is necessary during TIG welding because after the arc...

Page 5: ...optional TIG welding torch must be attached to the central adapter block on the front panel of the welder Stick Welding Mode When the MTS 160 is in the stick welding mode it is possible to perform DC...

Page 6: ...aterial This is also where you will install your optional electrode holder if you are arc welding If you will be arc welding DC electrode positive then the electrode holder will go in the positive rec...

Page 7: ...tighten the pressure roller adjusting screw until the wire feeds evenly without slipping Then tighten an additional 1 4 turn for steel No additional tightening is necessary for aluminum DO NOT OVERTIG...

Page 8: ...materials The flow rate should be set at 20 to 30 cfh depending on the welding conditions MIG WELDING WITHYOUR MTS 160 Connect the MIG welding gun to the adapter block Connect the proper shield gas t...

Page 9: ...our welder This is important to do prior to welding on your project so you will know which voltage setting to select for an application SEAM WELDING Install the conical nozzle Part 15105 on the weldin...

Page 10: ...dge of the first puddle Wait for the orange glow from the first puddle to disappear and deposit the second puddle of metal Continue this process until the seam is completed For a given thickness of me...

Page 11: ...aluminum welding kit 40011 or it may be necessary to use the RSG250 spool gun Pushing aluminum welding wire though a 10 ft welding gun is not a foolproof situation There is the possibility the welding...

Page 12: ...a problem The tendency for aluminum spatter to adhere to the swan neck contact tip and gas nozzle is much greater than that for steel Therefore use of the nozzle spray is extremely important However t...

Page 13: ...ht to see the welding process HTP has a flexible swan neck welding gun available Part 13510 available for welding muffler pipe The flexible swan neck makes it possible to bend the swan neck to get int...

Page 14: ...mended that you use TIG welding gloves like our BL25 gloves These are thinner than standard welding gloves and will give you a much better feel and make it easier to work the filler rod Grip the torch...

Page 15: ...This tungsten is the most common tungsten currently used Generally used for DC welding of steel and stainless steel Draw back is it has a low level radiation hazard Offers good overall performance 2...

Page 16: ...er rod for applications where the material is 1 8 and less Use a 3 32 diameter rod for 1 8 and thicker The following Filler Rod is available from HTP in 1 lb tubes which are tightly sealed to prevent...

Page 17: ...etting the tension on the drive roller does not remedy this problem then the liner should be replaced CHANGINGTHE CONTACTTIP The contact tip should be regarded as a wearing part and therefore requires...

Page 18: ...he wire in the groove DO NOT OVERTIGHTEN 4 Insert the wire protruding from the central adapter block into the end of the welding gun Install the welding gun on the welding machine 5 Remove the contact...

Page 19: ...n See Fig 18 3 Push the wire in and out of the welding gun as shown in Fig 19 The wire should move freely in the gun with little or no resistance If there is a great deal of friction the liner should...

Page 20: ...terial Also this is the only grade of welding wire that is compatible with the High Strength Low Alloy steels found in today s unibody vehicles 20 MONTHLY MAINTENANCE Your HTP MTS 160 is a very hardwo...

Page 21: ...21 Wiring Diagram MTS 160...

Page 22: ...Parts Breakdown MTS 160 22...

Page 23: ...ia 22mm 66121 14 Microswitch 64132 15 Label Front Panel 66619 16 Adapter Support 66462 17 Connections plate 66618 18 Male Plug 22312 19 Transformer 65844 20 Lable Control Panel 66617 21 Cabinet 62653...

Page 24: ...of the machine Is there about 12 Volts DC at the fan terminals Are the 3 secondary voltages present on T AUX Auxiliary Transformer 0 9V 0 12V 0 28V YES NO Change PCB 4 NO NO NO NO YES YES YES YES Go...

Page 25: ...roblem is in the plug or the panel Change the power cable NO NO YES C remove the torch Select TIG or MIG mode and simulate closing of the torch trigger short circuiting the 2 pins on the Euro coupling...

Page 26: ...14009 Trigger Switch 56 15062B Nozzle Springs 57 13002 DLT Gas Diffuser Left Hand Thread 58 14058 Head Insulator Std neck Illustration Part Description 59 15002 Swan Neck 63 15058 Head Insulator Flex...

Page 27: ...5 54N14 2A Gas Lens Collet Body 45V24 45V25 45V26 45V27 3 Collet 10N22 10N23 10N24 10N25 Short Configuration optional 1B Alumina Nozzle 13N08 13N09 13N10 13N11 2B Collet Body 17CB20 17CB20 17CB20 17CB...

Page 28: ...uty Cycle HTP MTS 160 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 Current Amps Duty Cycle Volt Amp Curve HTP MTS 160 0 5 10 15 20 25 30 0 50 100 150 200 250 300 350 Current A Voltage V 28...

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