JLG 3369electric, Service And Maintenance Manual

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SECTION 2 - PROCEDURES
3120768 – JLG Sizzor –
2-11
2.13 TILT SWITCH INDICATOR LEVELING
PROCEDURE
PERFORM TILT SWITCH LEVELING PROCEDURE A MINIMUM OF
EVERY SIX MONTHS TO ENSURE PROPER OPERATION AND
ADJUSTMENT OF SWITCH.
Manual Adjustment
1. Park the machine on a flat level surface. Be sure it is
as level as possible, with tires filled to rated pres-
sure.
NOTE: Ensure switch mounting is level and securely
attached.
2. Tighten the three flange nuts with a socket wrench.
Each nut should be tightened approximately one-
quarter of its spring’s travel.
3. Using bubble level on top of indicator, Tighten or
loosen the three flange nuts until indicator is level.
4. Individually push down on one corner at a time.
There should be enough travel to cause the indica-
tor to trip. If the indicator does not trip in all three
tests, the flange nuts have been tightened too far.
2.14 LIMIT SWITCHES
Drive Cut-Out Limit Switch (3969electric)
This switch is located on the front of the machine frame.
Adjust cam to trip limit switch when platform is elevated to
32 ft (9.75 m).
High Speed Drive Cut-Out
High drive speed is cut out when platform is raised above
stowed (fully lowered) position.
NOTE: There is no adjustment to be made to the Platform
Ext. limit switch which bolts on the bottom of the plat-
form (If Equipped).
2.15 PRESSURE SETTING PROCEDURES
Main Relief at Pump
1. Install pressure gauge at port “G” on 4640915 valve.
2. Activate and bottom out Lift Up. Adjust Main Relief to
2500 psi (172.37 bar).
Lift UP Relief
1. With pressure gauge at “G” port on 4640915 valve,
activate and bottom out Lift Up.
2. Adjust Lift Relief to 2500 psi (172 bar).on the 3369ES
and 2700 psi (186 bar) on the 3969ES
Lift Down Relief
1. With pressure gauge at “G” port on 4640915 valve,
activate and bottom out Lift Down.
2. Adjust Lift Relief to 900 psi (62.06 bar).
Steer Relief
1. With pressure gauge at “G” port on 4640915 valve,
activate and bottom out Steer Left or Right.
2. Adjust Steer Relief to 1200 (82.7 bar).
3. Shut down hydraulic system and remove pressure
gauge.
Updated 11/24/99