Slide Block Lubrication; Lift Cylinder Removal - JLG 1930ES Service Maintenance Manual

SECTION 4 - HYDRAULICS

Slide Block Lubrication

Lube - White Lithium Grease (GREDAG 741)
Interval - Every 6 months
1. With the platform empty, elevate machine and swing
safety prop out of it's stowed position.
ENSURE THE SCISSOR ARMS ARE PROPERLY SUPPORTED.
2. Locate the Lower and Upper Slide Pads and wipe/
pressure wash all dirt and debris from the slide
channel area (1, 2).
3. Apply a layer of grease along the inside and bottom
of the lower slide channel (1) on both sides of the
machine.
Lower Slide Pad Channel
4. Apply a layer of grease along the inside and top of
the upper slide channel (2) on both sides of the
machine.
Upper Slide Pad Channel
4-4
CAUTION

4.6 LIFT CYLINDER REMOVAL

NOTE: If there is a pump failure, a crane or a forktruck can
be used to raise the platform. Refer to Figure 3-47.,
Arms and Platform Positioning and Support.
Self locking fasteners, such as nylon insert and thread
deforming locknuts, are not intended to be reinstalled
after removal. Always use new replacement hardware
when installing locking fasteners.
1. Raise the platform and place on the safety prop. It
may be necessary to use an overhead crane or fork
truck to secure the platform and scissor arms before
lift cylinder removal begins. (See Figure 3-47.)
2. Cut any wire ties that attach any cables or hoses to
the lift cylinder.
PULL THE BATTERY DISCONNECT BEFORE REMOVING ANY
COMPONENTS FROM THE LIFT CYLINDER ASSEMBLY.
3. Remove the valves connectors, the two battery
cables and the manual decent cable.
NOTE: To avoid having to readjust the manual descent,
remove the large nut located behind the manual
descent bracket as shown. (See Figure 4-2.)
4. Ensuring that the deck and scissor arms are prop-
erly secure, remove the top lift cylinder pin and rest
the top of the cylinder on the arm cross tube directly
below the cylinder.
5. Remove the bolt form the lower cylinder pin and
have someone assist you in lifting the cylinder from
the scissor arms.
6. Set the cylinder with pump and motor assembly
intact on a clean workbench.
7. Remove the 4 bolts that attach the pump/motor
assembly to the lift cylinder.
8. Remove the bolt from the bracket that attaches the
hydraulic reservoir to the lift cylinder.
9. Separate the cylinder from the pump/motor assem-
bly.
– JLG Lift –
NOTICE
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