TM-428 Page 32
Miller Legend
6-16. Checking Unit Output After Servicing
Ref. ST-800 698-A / ST-800 249
Check engine speeds, and adjust
if necessary (see Section 8-5).
11
15 V
AC 100 Hz Receptacle
RC4
With no load applied and engine
running at weld rpm, there should
be 128 to 132 volts ac present at
RC4.
2 Slider
3 Resistor
R4
Y Stop engine before adjust-
ing
R4
If necessary, adjust slider on R4
until
128 to
132 volts ac is obtained
at RC4. Do not exceed 132 volts
ac.
4DC
W
eld Output T
erminals
Turn
Fine Amperage control R1 to
max.
With no load applied and en
-
gine running at weld rpm, there
should
be 70
to 72 volts dc present
at
dc weld terminals.
5 Resistor R2
Y Stop engine before adjust-
ing
R2
If
correct voltage is not present, ad
-
just slider on R2 until correct volt-
age is obtained at dc weld termi-
nals.
Do not exceed 72 volts dc.
Stop engine. Allow engine to
cool,
and
then complete pre-operational
checks
in table.
Reinstall cover and side panels.
T
ools Needed:
2
3
5
2
1
4
Pre-Operational Checks
Wipe engine surfaces clean.
Check labels; replace labels that are unreadable or damaged.
Check and correct any fluid leaks.
Clean weld output and battery terminals.
T
ighten connections.
Clean outside of entire unit.
Check fuel and oil (see Section 2-4).
