JLG 3246ES Service Manual - Manual (Page 105)

SECTION 4 - HYDRAULICS
3121166 – JLG Lift – 4-3
8. Remove pressure gauge and replace the plug into
the P port.
9. Replace the bronze washer with a new bronze
washer and large nut over the pressure setting
screw. Do not use old bronze washer. Using the old
bronze washer will cause leakage.
10. Torque the large nut to 160 in. lb (16 Nm).
Alternate Lift Pressure Setting Procedure:
1. Increase lift pressure to raise the platform and set
the safety prop.
2. Remove plug from port P (3) and install a pressure
gauge.
3. Remove the solenoid from the lift valve.
4. Set the pressure actuating lift function from the
ground or platform.
5. Remove the pressure gauge from port P (3) and
replace plug.
6. Replace the solenoid on the lift valve.
4.5 HYDRAULIC OIL FILL
NOTE: The hydraulic oil level should be checked every 6
months. Always check the oil level any time any
maintenance is performed that would effect the
hydraulic oil level.
Oil Check Procedure
1. With the scissor lift on a flat and level surface and
the platform empty, elevate machine and swing
safety prop out of it’s stowed position.
2. Continue to elevate the platform until the fill plug,
located on the right side of the tank attached to
the lift cylinder, is fully accessible.
CAUTION
ENSURE THE SCISSOR ARMS ARE PROPERLY SUPPORTED.
NOTE: The 2630ES/2646ES/ 3246ES platforms will have to
be raised higher than the 1930ES and 2030ES in
order to access the oil plug.
3. Wipe all dirt and debris from the filler plug area.
4. Slowly remove the fill plug venting any pressure
that may be built up in the reservoir.
5. To check the oil level, lower platform so it rests on
the safety porp.
CAUTION
THERE MAY BE UP TO 10 PSI OF PRESSURE IN THE TANK.
6. With the plug removed, the oil level should be
completely full, at the top of the fill port with scis-
sor arms resting on the safety prop. from the fill
port.
7. If additional oil is required, add proper grade of oil
by using a funnel with a flexible spout or a plastic
squeeze bottle. Fill until oil weeps out of opening.
NOTE: Care should be taken not to introduce any impurities
(dirt, water etc.) while plug is removed.
8. Replace plug and torque to 40 ft. lbs. (56 Nm).
9. Any time a hydraulic component is removed or
replaced, cycle the scissor arms several times and
refer to steps 3 and 4 to recheck oil level.
Table 4-1. Lift Pressure Settings
Model Lift Relief Steer Relief
1930ES
1800 psi ± 50 psi
(124 bar ± 3.5 bar)
1500 psi
(103.4 bar)
2030ES
1800 psi ± 50 psi
(124 bar ± 3.5 bar)
1500 psi
(103.4 bar)
2630ES
1950 psi +/- 50 psi
(134.5 bar ± 3.5 bar)
1500 psi
(103.4 bar)
2646ES
2000 psi +/- 50 psi
(138 bar ± 3.5 bar) 1500 psi
(103.4 bar)
3246ES
2000 psi +/- 50 psi
(138 bar ± 3.5 bar) 1500 psi
(103.4 bar)