Section 5 − Operating The Welding Generator; Engine Control Switches - Miller Trailblazer 302 Diesel Technical Manual

SECTION 5 − OPERATING THE WELDING GENERATOR

5-1. Engine Control Switches

Controlling Engine Speed
Any
position.
° °
70 F (21
° °
32 F (0 C)
°
−4 F (−20
Do not use glow plugs longer than
20 seconds.
Do not use ether to start engine.
Using ether voids warranty.
1 Engine Control Switch
Use switch to start engine, select speed, and
stop engine. In Run/Idle position, engine runs
at idle speed at no load, and weld/power speed
under load. In Speed Lock position, engine
speed is determined by position of Speed Lock
switch (see item 2 and engine speed table
above).
.
Place Engine Control switch in Speed
Lock position and Speed Lock switch in
Run position for TIG (GTAW) welding us-
ing a high frequency device.
.
In MIG mode, the unit will not return to idle
speed when the remote contactor is on
(closure between pins A and B or I and J
on remote receptacle).
TM-217 454 Page 12
=
2450 rpm (Idle Speed)
Continuous
3750 rpm max (Weld/Power
=
Speed) Continuous.
Use in welding applications where
high speed is needed for better
arc starting and in TIG
applications using a high
frequency arc starter.
=
No Load: 2450 rpm (Idle Speed)
Load: 3750 rpm max (weld/Power
Speed)
Glow Plug Time
t
C) 0 seconds
10 seconds
°
C)
20 seconds
2 Speed Lock Switch
Use switch to lock engine in idle or weld/power
speed when Engine Control switch is in the
Speed Lock position. The Speed Lock switch
is not needed at start-up. The engine always
starts at idle speed.
With switch in the Idle position and Engine
Control switch in Speed Lock, the engine runs
at idle speed. With switch in Run position and
Engine Control switch in Speed Lock, engine
runs at weld/power speed.
Speed Lock switch does not affect engine
speed when Engine Control switch is in Run/
Idle position. (Engine speed changes with
load.)
3 Glow Plug Switch
If necessary, push switch down before start-
up to activate glow plug. See glow plug table
above for operating information.
4
1
2
To Start: Use glow plug switch if necessary
(see item 3 and glow plug table). Turn engine
control switch to Start. Release engine control
switch when engine starts.
.
If the engine does not start, let the engine
come to a complete stop before attempt-
ing restart.
To Stop: Turn Engine Control switch to Off
position.
.
Close fuel valve to stop engine if Engine
Control switch does not work (see Section
4-6).
4 Fuel Level Indicator
With Engine Control switch in the Speed Lock
or Run/Idle position, LED's indicate fuel level
left in tank.
3
Ref. 216 171-B
Trailblazer 302 D