Profax AEC 200-4C - Manual (Page 8)

REMOVAL & REPLACEMENT INFORMATION
A.) DRIVE ROLL
1.) Unlatch swing out arm and rotate out away from drive roll.
2.) Remove palnut from end of motor shaft.
3.) Lift drive roll off shaft.
4.) Install new drive roll making sure key way lines up with woodruff key.
5.) Replace palnut.
6.) Readjust tension on swing out arm.
B.) DRIVEN ROLL
1.) Unlatch swing out arm and rotate out away from drive roll.
2.) Remove one of the retaining rings on the driven roll bearing pin.
3.) Remove pin and driven roll.
4.) Install the replacement driven roll, inserting pin and replace retaining ring.
5.) Return and readjust tension on swing out arm.
C.) MOTOR
1.) Remove front cover.
2.) Remove the four screws on rear cover to release housing.
3.) Remove motor leads on terminal strip. (16 black and 23 red)
4.) Remove the three screws holding gun handle to housing.
5.) Remove handle assembly from housing. Remove the motor insulator and O-ring, set them aside for use when
reassembling.
6.) Remove motor from gun handle.
7.) Remove drive roll and place on replacement motor making sure key way lines up with woodruff key, replace palnut.
8.) Install new motor in handle, making sure motor lead wires are in the groove provided in the handle. Replace motor insulator and
O-ring in proper place.
9.) Reassemble gun making sure motor leads are out of way of the movable arm on the rheostat.
D.) GAS VALVE
1.) Remove front and rear covers.
2.) Remove retaining ring from trigger pin, remove palnut from valve pin, remove the pin, trigger, trigger spring and the valve guide.
3.) Remove retaining nut on diaphragm assembly, remove pin and diaghram.
*IMPORTANT: Before gun assembly adjust gas valve as follows:
A.) Attach shielding gas supply hose from AEC 200-4 gun to the flowmeter regulator on gas supply source.
B.) Full gas flow must be attained before microswitch is actuated. Pull the trigger and adjust the palnut to achieve proper gas
flow. An allen screw in the trigger casting allows for proper gas flow adjustments before microswitch is actuated.
C.) With the gun trigger fully depressed adjust the microswitch actuating screw, in the trigger casting, until the microswitch
makes first click. While still holding the gun trigger fully depressed, check for at least 0.30” of movement in the microswitch
actuating button.
D.) Reassemble the Gun.
4.) Install new valve components.
E.) MICROSWITCH
1.) Remove the microswitch insulator and microswitch.
2.) Remove electrical lead wires.
3.) Connect electrical lead wires to new microswitch.
4.) Replace microswitch and insulator to housing.
F.) WIRE FEED SPEED POTENTIOMETER
1.) Remove front cover.
2.) Disconnect electrical lead wires from terminal strip inside rear cover. (Lead's #13, 14 & 15)
3.) Remove potentiometer screws from housing and remove potentiometer.
4.) Replace new potentiometer with screws previously removed.
5.) Reconnect the marked lead wires to corresponding terminals on terminal strip in rear cover.
AEC-200 Contact Tips, Nozzles, & Adapters
PART NO. WIRE SIZE I.D.
3356 .030-.035 Hard .044
3299 .045-3/64” Aluminum .060
3300 1/16” Aluminum .078
45-070 3/64” Aluminum .073
3136 .030 Aluminum .040
3115 .035-.047 Aluminum .064
3135 1/16” Aluminum .084
3067 .030-.035 Hard .060
3068 .045-3/64” Aluminum .084
3069 1/16” Aluminum .120
PART NO. I.D. MATERIAL
4137 5/8” Copper
4268 7/16” Brass
4117 1/2” Copper
4118 3/4” Copper
4110 5/8” Copper
These nozzles are used with the old style assembly see 4124 page 8.
4269 11/16” Brass
4572 11/16” Copper
4270 11/16” Brass
4552 9/16” Brass
Available Through Your
Welding Supply Distributor
7 6
4”
6-1/8”
4”
1/4”
1/4”
1/4”
1-1/2”
3/4”
1”
7/8 - 14 Thd.
1-5/8”
1”
7/8 - 14 Thd.
1-1/2”
1”
1”
7/8 - 14 Thd.
7/8 - 14 Thd.
1-1/2”
1-5/8”
1”
1 - 14 Thd.
®
PART NO. I.D. MATERIAL