Solar 2150 Wire Feed Welder Manual May 2026
The original 1990 manual specified three maintenance intervals:
Before striking an arc, you must understand the machine’s limits. According to archived spec sheets for the Solar 2150:
| Specification | Detail | | --- | --- | | Input Power | 115V AC, 20A (Dedicated circuit recommended) | | Rated Output | 70A @ 20% Duty Cycle (or 90A peak, depending on revision) | | Open Circuit Voltage (OCV) | 28V DC | | Wire Feed Speed | 50 – 300 IPM (Inches Per Minute) | | Welding Wire Capacity | 2 lb. spool (8” diameter max) | | Wire Diameters | .023” – .035” Solid wire; .030” – .035” Flux-core | | Thermal Protection | Automatic resetting thermostat |
Crucial Note: The Solar 2150 is a DC Electrode Positive (DCEP) machine. For flux-cored wire (no gas), this is correct. For solid wire with gas, you do not need to reverse polarity—it is preset.
Front Panel Overview:
Unplug the unit. Remove the 4 side screws. Slide the cover off. Do not run the machine with the cover off for more than 30 seconds (it cools via chassis conduction).
This exact procedure is diagrammed in every Solar 2150 wire feed welder manual.
Q: Can I use my Solar 2150 with an extension cord? A: The manual warns against cords longer than 25 feet. If necessary, use 12-gauge or thicker (10-gauge) cord. 14-gauge cords will cause voltage drop and poor weld quality.
Q: What wire size is recommended? A: For auto body: .023” solid wire + C25 gas (75% Argon/25% CO2). For general outdoor work: .030” or .035” E71T-GS flux-cored wire. Never use aluminum wire in this machine.
Q: My wire feed motor runs but the roller doesn’t turn. A: The drive roll gear may be stripped. Open the case and inspect. Replacement gear kits are available online. This is a known wear point mentioned in later manual revisions.
Q: Is there a gas conversion kit? A: Most Solar 2150 models are dual-purpose. You only need to add a regulator and gas hose. The manual specifies a standard CGA-320 fitting for CO2/Argon mix.
Note: If your Solar 2150 has different controls (e.g., infinite voltage knob), treat the voltage selection as Low = 1–2, High = 3–4 on a 1–10 scale. Always test on scrap first.
For a full schematic or original manual, search “Solar 2150 welder manual PDF” or check forums like WeldingWeb – it shares internals with Campbell Hausfeld WG2000 and Clarke EN90.
The Case of the Silent Spool
The mid-July heat in the shop was enough to melt the soles of your boots, and Elias was already sweating through his shirt before noon. He was staring down the barrel of a rush job: a cracked loader bucket for a local excavation company that needed to be finished by 5:00 PM.
Elias was a stick welder by trade. He liked the crackle of 7018 rod and the simplicity of the process. But for this thin-sheet patch job on the loader’s hydraulic shield, he knew he needed the wire feeder. He wheeled out the shop’s ancient Solar 2150 Wire Feed Welder.
It was a beast of a machine—beige sheet metal, heavy transformers, and a tangle of cables that looked like a rat’s nest. Elias plugged it in, flipped the switch, and the fan hummed to life. He squeezed the trigger on the gun.
Whirrrrrr.
The drive rolls spun, but no wire came out. Then, the machine let out a low, agonizing groan and tripped the breaker on the wall.
Elias cursed, reset the breaker, and tried again. Same result. He checked the tension on the drive rolls. He checked the ground clamp. He swapped the contact tip. Nothing. The machine simply would not feed wire, and when it tried, it sounded like it was dying.
"You're treating it like a new machine, Elias," said a voice from behind. solar 2150 wire feed welder manual
It was old man Miller, the shop owner. He was leaning against a workbench, wiping grease off his hands with a rag.
"It's toast, Miller," Elias said, kicking the tire of the welder. "The motor is shot, or the PC board is fried. We need to roll out the Lincoln."
Miller shook his head. "That Solar 2150 was welding before you were out of diapers. It’s not the hardware; it’s your setup. You’re treating it like a modern inverter. It doesn't have auto-sensing voltage. You have to tell it what to do."
Miller walked over to a dusty shelf and pulled down a battered, coffee-stained binder. The label on the spine was faded, but Elias could just make out the words: Solar 2150 Wire Feed Welder Manual.
"Grab a chair," Miller said, dropping the binder on the bench.
Chapter 1: The Polarity Puzzle
Miller flipped to the wiring diagram section. "Look here. Page 7. You’re trying to weld solid wire, right?"
"Yeah, .035 ER70S-6," Elias said.
"Solid wire requires DCEP—Electrode Positive," Miller said, tapping the diagram. "But look at the machine. The last guy was running flux-core to patch the dumpsters. He probably switched the polarity to DCEN to save money on gas."
Elias looked at the front panel of the Solar 2150. Inside the wire feed compartment, there were two brass lugs with heavy cables connecting them. Currently, the cable was plugged into the negative terminal.
"Flip those leads," Miller instructed.
Elias loosened the nuts with a wrench and swapped the cable to the positive terminal. He tightened it down.
"That solves the penetration issues, but it doesn't explain why the motor was groaning and tripping the breaker," Elias argued.
Chapter 2: The Voltage Tap
Miller flipped a few pages deeper into the manual. "Section 4: Voltage Selection. This isn't a digital machine, kid. You don't dial in 18.5 volts. You have to choose a 'Tap.'"
He pointed to a heavy-duty rotary switch inside the side panel of the 2150. It was labeled 1 through 6.
"You see that?" Miller asked. "You have the switch set to 'Tap 1'. That's the lowest voltage. Now, look at the wire feed speed dial on the front. You cranked that to max speed because you were in a hurry."
"Yeah, so?"
"Read the chart," Miller said, pointing to a greasy graph in the manual.
Elias squinted. The chart showed the relationship between Voltage Taps and Wire Feed Speed. "Warning: High wire feed speed on low voltage taps (1-2) may exceed the duty cycle of the drive motor and cause transformer overload." Wire Feed Speed Control: Adjusts how fast the
"You were starving the arc of voltage while cramming wire into it at 500 inches per minute," Miller explained. "The machine was choking. It tripped the breaker because you were creating a dead short before the arc could establish."
Chapter 3: The Fine Tune
"Okay," Elias admitted. "So I have the polarity wrong, and I have the voltage mismatched. But what settings do I actually need?"
Miller handed him the manual. "Look at the parameter guide for 1/8th inch steel. It recommends Tap 4."
Elias reached in and turned the heavy rotary switch to the number 4 position.
"Now," Miller continued, "Turn your wire feed speed knob down to about 3. The Solar 2150 has a massive inductance in its transformer. It runs 'hot.' If you set it like a Lincoln, you'll blow holes through everything. The manual says to start low and ease into it."
The Resolution
Elias hooked up
The Solar 2150 (Model 117-051) is a 110-amp MIG welder designed for light-duty metal work and auto body repair. It is a single-phase machine that typically runs on standard 120V household outlets. Safety First
Personal Protection: Always wear a welding helmet with the correct shade, fire-resistant gloves, and protective clothing to shield against UV radiation and sparks.
Ventilation: Ensure the welding area is well-ventilated to avoid inhaling harmful fumes.
Thermal Protection: The machine includes internal thermal protection. If it stops feeding or the arc dies, let it cool until the protection resets (indicated by a yellow light on some models). Setup and Installation 117-051 2150 Solar 110 amp MIG welder (phase-control)
The Solar 2150 (Model 117-051) is a 110-amp, 120V wire feed MIG welder often used in auto body repair. While the original physical manual may be difficult to find, it shares operations and parts with similar legacy models from brands like Campbell Hausfeld and Century. Core Controls & Operation Based on typical configurations for this series:
Infinite Wire Speed Control: A dial allows for precise adjustment of the wire feed rate, usually between 50 and 700 inches per minute.
Heat Selector: Features a multi-position switch (often 4 to 9 positions) to adjust welding power for different metal thicknesses.
Thermal Protection: A built-in light illuminates if the welder overheats, indicating the thermostat has automatically shut it off to prevent damage. Setup & Parts
Wire Options: Accommodates .024", .030", and .035" wire. It can handle both Flux Cored Arc Welding (FCAW) without gas and Gas Metal Arc Welding (GMAW) with shielding gas. Polarity Selection:
MIG (Gas): Connect torch to positive (+) and work clamp to negative (-).
Flux-Core (No Gas): Connect torch to negative (-) and work clamp to positive (+).
Replacement Parts: You can find specialized replacement guns and consumables like contact tips, nozzles, and liners through specialized retailers like USAweld (HTP America). Troubleshooting Common Feed Issues Contactor Toggle (Cold Inch / Run / Spot):
Erratic Feeding: Often caused by incorrect drive roll tension. If too loose, the wire slips; if too tight, it can crush the wire.
Clogged Liner: Dust or rust on the wire can accumulate inside the gun's liner. Regularly blowing it out or using a "wire wiper" can help.
Worn Contact Tips: Replace the tip if it becomes blocked by debris or experiences "burn back".
Power Issues: If the motor doesn't run, check the internal fuses or ensure the torch trigger wires are securely plugged into the circuit board.
For more specific documentation, you can browse a collection of Solar Manuals at Century Tool or contact technical support for legacy units at 1-800-746-5641.
Are you currently troubleshooting a feeding issue or looking for a specific wiring diagram for your unit? 2150 (117-051) HTP Replacement Gun & Parts
Overview of Solar 2150 Wire Feed Welder
The Solar 2150 is a wire feed welder designed for industrial and commercial welding applications. It is a part of the Solar welding machine product line, known for its reliability and performance.
Key Features
Operating Instructions
Here are some general operating instructions for the Solar 2150 wire feed welder:
Safety Precautions
Troubleshooting Tips
Manual Availability
Unfortunately, I couldn't locate a digital copy of the Solar 2150 wire feed welder manual. However, I can suggest some possible sources where you may be able to find one:
Additional Resources
If you're looking for more information on welding techniques, safety procedures, or troubleshooting tips, here are some additional resources:
Title: Comprehensive Operation & Maintenance Guide for the Solar 2150 Wire Feed Welder
Disclaimer: This document is a reconstruction of general operating procedures based on the standard specifications of the Solar 2150 model. Welding involves high voltage, extreme heat, and toxic fumes. Always consult the specific nameplate on your machine and adhere to all ANSI and OSHA safety standards..
The front panel of the Solar 2150 is straightforward, but nuance matters.
| Control | Function | Typical Setting (Manual Data) | | --- | --- | --- | | Voltage Tap Switch | A, B, C, D (or 1-4). Low voltage for thin metal, high for thicker. | A: 24ga steel; D: 1/8” steel | | Wire Speed Dial | 0-10 (infinite). Higher speed = more current. | Start at 5, adjust based on sound (steady crackle) | | Polarity Terminal | + (positive) and - (negative) studs inside. | DCEN (electrode negative) for flux-core; DCEP for solid wire + gas |
Critical tip from the manual: For flux-cored wire, the torch must be connected to the NEGATIVE (-) terminal. For solid wire with shielding gas, swap to POSITIVE (+). Ignoring this will result in excessive spatter and poor penetration.