JLG 860SJ Operator Manual - Manual (Page 113)

SECTION 5 - EMERGENCY PROCEDURES
3121138 – JLG Lift – 5-3
To Retract and Lower Boom
1. Turn knob #1 and #4 clockwise until tight.
2. Turn knobs #2 and #3 counterclockwise 3 turns.
3. Pump the hand pump until tight.
4. After telescope has fully retracted turn knob #4 counter-
clockwise until fully open to continue lowering boom.
To Lower Boom with Fully Retracted Telescope
1. Turn knob #1 and #3 clockwise until tight.
2. Turn knob #2 counterclockwise 3 turns.
3. Turn knob #4 counterclockwise until fully open.
4. Pump the hand pump until tight.
NOTE: When the manual descent operation has been completed,
knobs #1, #2, and #3 should be open (counterclock-
wise), knob #4 should be closed (clockwise).