Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

F-57

TROUBLESHOOTING & REPAIR

F-57

 

 

 

SCR BRIDGE / HEAT SINK ASSEMBLY REPLACEMENT PROCEDURE

FIGURE F.29. Individual Heatsink Removal

Positive

 

Buss Bar

Snubber

 

Assembly

 

 

SCR

 

 

Bridge

 

Anode

Assembly

 

 

Heatsink

 

 

 

 

Cathode

 

 

Heatsink

 

 

SCR Assembly

 

 

Mounting Studs

Return to Section TOC

Return to Master TOC

REMOVAL OF INDIVIDUAL SCR HEAT SINK ASSEMBLIES

1.Using a 9/16” nut driver, remove the nuts and respective washers securing the posi- tive buss bar in position. Remove buss bar. See Figure F.29.

2.Using a 9/16” nut driver, remove the nut and respective washers securing the snub- ber board and cathode heatsink to the main assembly. See Figure F.29.

3.Carefully remove the SCR heatsink from the mounting studs. Replacement will be made with a new SCR assembly.

4.Replace snubber assembly if necessary.

INSTALLATION OF INDIVIDUAL SCR HEAT SINK ASSEMBLIES

NOTE: Upon reassembly, apply a thin layer of Lincoln T12837 (Dow Corning #340) heat sink compound to all bolted elec- trical connections on the aluminum heat sinks, including positive buss bar.

1.Carefully position new SCR assembly on to heatsink mounting studs.

2.Place positive buss bar back in original position.

3.Replace 9/16” nuts and washers previous- ly removed.

Return to Section TOC

Return to Master TOC

CAUTION

DO NOT DISASSEMBLE THE SCR FROM THE HEAT SINK. REPLACE THE SCR ONLY AS AN ASSEMBLY.

---------------------------------------------------

MULTI-SOURCE

Page 85
Image 85
Lincoln Electric SVM155-A service manual Removal of Individual SCR Heat Sink Assemblies

SVM155-A specifications

The Lincoln Electric SVM155-A is a state-of-the-art welding machine that excels in versatility and performance, making it ideal for both professional welders and hobbyists. This multi-process welder supports MIG, TIG, and stick welding processes, allowing users to tackle a wide range of applications with a single device. Its user-friendly design and advanced technology make it an exceptional choice for those looking to enhance their welding capabilities.

One of the main features of the SVM155-A is its robust power output, which can handle welding materials ranging from thin sheets to heavier stock. The welder offers a high duty cycle, ensuring that users can work efficiently without the need for prolonged breaks. This is especially important in industrial settings where productivity is key. Additionally, the SVM155-A is equipped with a digital display that allows for easy monitoring and precise control of the welding parameters, ensuring consistency in weld quality.

The European-designed INVERTER technology embedded in the SVM155-A significantly contributes to its lightweight and compact design. Weighing in at only 19.4 lbs, this welder is portable and ideal for fieldwork or workshops where space is limited. The inverter technology not only reduces the size and weight but also improves energy efficiency, leading to lower operational costs over time.

The SVM155-A also features advanced safety mechanisms, including over-current protection to safeguard the machine from potential damage during excessive use. It also includes a thermal overload shut-off, which prevents overheating, ensuring a longer lifespan for the welder.

Another standout characteristic of the SVM155-A is its exceptional arc stability and ease of use. The machine is designed to provide a smooth and consistent arc, reducing spatter and ensuring clean welds. Moreover, the welder is compatible with a wide range of materials, including stainless steel, aluminum, and carbon steel, further enhancing its versatility.

In conclusion, the Lincoln Electric SVM155-A is a powerful, durable, and multifunctional welding machine that incorporates advanced technologies to meet the needs of modern welding applications. Its portability, safety features, and ability to deliver high-quality welds make it an excellent investment for anyone looking to improve their welding skills or expand their capabilities in various welding projects.