JLG X23J - X700AJ Service Manual - Manual (Page 332)

SECTION 3 - CHASSIS & TURNTABLE
3121448 – JLG Lift – 3-305
Basic engine equipment
ADJUSTING LOWER IDLE SPEED
General information:
The lower idle speed must only be adjusted when the
engine is warm and with power take-off components
attached.
Initial adjustment with engine stopped:
– Turn adjusting screw 1 for the idle spring until the inner
lever and the spring are aligned.
– Turn adjusting screw 2 for the stabilizing spring fu illy to
the left.
Adjustment with engine running:
– Release friction brake 3 (speed control will then move
freely).
– Start the engine and run it at a constant speed of
approx. 1300 rpm by moving the speed control lever.
– Carefully turn adjusting screw 1 for the idle spring to the
right until a speed of 1300 - 1400 rpm is maintained when
the control lever is released.
– Reduce the speed carefully at the adjusting screw to
1100 - 1150 rpm.
– Move up idle speed stabilizing spring 2 carefully until
engine speed rises by 8 - 10 rpm and there is no further
tendency for the speed to vary.
– Check the upper idle speed and correct it if necessary.
– Ease off stop screw 4 for the lower idle speed until the
lower idle speed does not change when the speed control
lever makes contact, but the engine can still be stopped
by pushing against leaf spring 5.