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 bot-
tom 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
4-6
CAUTION
4.7

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 COM-
PONENTS 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
assembly.
– JLG Lift –
NOTICE
3121656