CHAPTER 3: MAINTENANCE OF ENGINE
TM 9-2350-256-20
3-14 ADJUST ENGINE IDLE SPEED Continued
ADJUSTMENT'
1
With engine running and operating temperature
normal (refer to TM 9-2350-256-10), loosen locknut
(1) on idle speed adjusting screw (2).
2
Turn idle speed adjusting screw (2) clockwise to
increase speed or counterclockwise to decrease
speed.
3
Tighten locknut (1) after 675-725 revolutions per
minute (rpm) is obtained.
NOTE
Follow-on maintenance:
Install grille doors (see
paragraph 9-57)
3-15 ADJUST ENGINE SOLENOID SPEED
THIS TASK COVERS
Adjustment
INITIAL SET-UP
Tools:
Reference:
Tool kit, general mechanic's (Appendix C, item 53)
TM 9-2350-256-10
Personnel Required:
Equipment Condition:
2
Grille doors removed (see paragraph 9-57)
ADJUSTMENT
CAUTION
Do not allow engine to exceed 1800 rpm
with power takeoff engaged.
1
With engine running and operating temperature
normal (refer to TM 9-2350-256-10), loosen locknut
(1) on solenoid speed control adjusting screw (2).
Activate power takeoff and have assistant increase
engine speed to 1800 rpm.
2
If 1800 rpm cannot be obtained when solenoid speed
control adjusting screw (2) engages stop (3), turn
adjusting screw counterclockwise to increase rpm. If adjusting screw has not engaged stop when 1800 rpm is
obtained, turn adjusting screw clockwise until it engages stop.
3
Allow engine to return to idle speed, increase engine speed to 1800 rpm, and recheck adjustment. If adjustment is
not correct, repeat step 2.
4
Tighten locknut (1) after correct rpm (1800 rpm at no load) is obtained.
NOTE
Follow-on maintenance:
Install grille doors (see paragraph 9-57)
3-34
