Adjusting Engine Speed - Miller Trailblazer 302 Diesel Technical Manual

7-4. Adjusting Engine Speed

NOTE
A. Checking Fuel Solenoid
1
Trailblazer 302 D
If the engine does not start and stop properly, verify the fuel solenoid is installed
properly before adjusting engine speed (see Section A following).
If the engine does not stay at idle speed, verify the throttle solenoid is installed and
adjusted properly before adjusting engine speed (see Section B following).
If the engine runs properly but the speeds are incorrect, do not adjust the
solenoids. Adjust the engine speed according to the instructions in Section C.
3
Verify mounting
bracket is recessed
from edge of engine.
2
Tighten mounting screws when
solenoid is in correct position.
8
7
4
Y Stop engine.
Tools Needed:
If the engine does not start and stop when
using the Engine Control switch, check
the position of the fuel solenoid.
7/16 in
10, 14 mm Adjusting Fuel Solenoid Position
1
2
3
.
When properly adjusted, the solenoid
bracket is slightly recessed from the edge
of the engine block and the solenoid link-
age easily travels between the stop screw
and the fuel solenoid internal stop.
If adjustment is necessary, loosen the so-
lenoid mounting screws and push the so-
lenoid bracket back toward engine as far
as possible.
Continue pushing on solenoid bracket in
a clockwise direction while tightening
mounting screws.
4
5
6
7
8
.
Hold throttle solenoid in idle (energized)
position. If shutdown lever is touching or
within 1/16 in of stop screw, fuel solenoid
is properly adjusted.
If lever is more than 1/16 in. from stop
screw, check for clearance between jam
nut and fuel solenoid. If there is clearance
between jam nut and solenoid, loosen nut
and turn plunger clockwise until lever
touches stop screw. Retighten nut.
If there is no clearance between jam nut
and solenoid, loosen the solenoid mount-
6 5
ing screws and reposition the solenoid as
described at the beginning of this section.
Fuel Solenoid
Stop Screw
Fuel Solenoid Mounting Screws
Stop screw is factory-set and should
not be adjusted.
Shutdown Lever
Stop screw
Stop Screw Jam Nut
Fuel Solenoid Jam Nut
Plunger
Stop screw is factory-set and should
not be adjusted.
Ref. 804 197-A / 802 649
TM-217 454 Page 25