Service Manual

SECTION 4 - BOOM & PLATFORM
4-12 – JLG Lift – 3121201
PLUNGER VALVE TO ACTIVATE WHEN BOOM IS
RAISED BETWEEN 76° - 79°
NOTE: ADJUST SCREWS SO THAT PLUNGER ON VALVES HAS
0.25" (6.35 mm) TRAVEL REMAINING WHEN LOWER BOOM IS
FULLY RAISED AND RETRACTED
NOTE: ADJUST SCREWS SO THAT PLUNGER ON
VALVES HAS 0.25" (6.35 mm) TRAVEL REMAIN-
ING WHEN LOWER BOOM IS FULLY RAISED AND
RETRACTED
SWITCH TO ACTIVATE WHEN
UPRIGHT IS RAISED TO 40° - 42°
FROM STOWED POSITION. SWITCH
TO RESET WHEN UPRIGHT IS LOW-
ERED 25° TO 30° FROM ACTIVATED
POSITION.
SWITCH TO ACTIVATE WHEN BOOM IS 126 ± 1"
(320 ± 2.5 CM) FROM BEING FULLY EXTENDED
DUAL CAPACITY SWITCH TO ACTIVATE WHEN BOOM IS LOWERED TO 50°,
+5° -0 °. SWI TCH TO RESE T W HE N B OO M I S RA IS ED TO 60° , + 5° -0 °.
SWITCH TO ACTIVATE WHEN BOOM
REACHES 0° TO 5° ABOVE HORIZONTAL.
SWITCH TO RESET WHEN BOOM IS
LOWERED 4°TO 9° BELOW HORIZONTAL.
Figure 4-9. Boom Limit Switch Adjustments