CONNECTION OF THE LN-742 TO THE

RANGER 305D.

(SEE FIGURE C.7.)

1. Shut the welder off.
2. Connect the electrode cable from the LN-742
to the “+” terminal of the welder. Connect the work
cable to the “-” terminal of the welder.
NOTE: Figure C.7 shows the electrode connected for
positive polarity. To change polarity, shut the welder
off and reverse the electrode and work cables at the
output terminals.
NOTE: Welding cable must be sized for current and
duty cycle of application.
3. Connect the K619 Control Cable to the 14-pin
amphenol on the Ranger 305D and the input cable
plug on the LN-742..
4. Set the “VOLTMETER”switch to “+” or “-” depend-
ing on the polarity chosen.
5. Set the “MODE” switch to “CV-WIRE”position.
6. Place the “IDLER” switch in the “AUTO” or “HIGH”
position, as desired.
An increase of the high idle engine RPM by changing
the governor setting or overriding the throttle linkage
will cause an increase in the AC auxiliary voltage. If
thisvoltage goes over 140 volts, wire feeder control cir-
cuit may be damaged. The engine governor setting is
preset at the factory - do not adjust above RPM speci-
fications listed in this manual.
------------------------------------------------------------------------
7. Place the “WELD TERMINALS” switch in the
“REMOTELYCONTROLLED” position.
8. Adjust wire feed speed and voltage at the LN-742..
9. Set theARC control to “0” initially and adjust to
suit.
ACCESSORIES
C-9 C-9
RANGER 305D
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC
CAUTION
+-
TO WORK
14-PIN
AMPHENOL
ELECTRODE CABLE
TO WIRE FEED UNIT
ELECTRODE CABLE
TO WIRE FEED UNIT
K619 CONTROL CABLE
TO LN-742 INPUT
CABLE PLUG

FIGURE C.7 - Ranger 305D/LN-742 CONNECTION DIAGRAM