Scissor Arms And Platform Positioning And Support; Platform Removal; Scissor Arms Removal - JLG 1930ES Service Maintenance Manual

3.13 SCISSOR ARMS AND PLATFORM POSITIONING
AND SUPPORT
PLATFORM IS HEAVY AND PRESENTS A CRUSHING HAZARD.
TAKE GREAT CARE WHEN REMOVING PLATFORM OR SCISSOR
ARM ASSEMBLY
The arm stack can be supported by using an overhead
crane,(See Figure 3-47.). If an overhead crane is not
available the stack may also be lifted by using a fork-
truck using the following instructions:
1. With the forks on the forktruck slid close together,
enter from the front of the machine and place the
forks on the cross tube of the second arm weld-
ment below the platform.
2. Slowly lift the arm stack with the forktruck while
the manual descent valve is being engaged (this
allows the oil to drain back into the tank).
3. Place machine on safety prop and leave the fork-
truck in place.
4. At this point the lift cylinder removal may begin.
(Refer to Section 4.7, Lift Cylinder Removal)
If removal of the platform becomes necessary use the
above procedure to stabilize the platform for pin and

platform removal.

3.14 PLATFORM REMOVAL
1. Support the platform using an overhead crane
with straps capable of lifting at least 250 lbs (114
kg) (See Figure 3-47.). Refer to Section 3.13, Scissor
Arms and Platform Positioning and Support.
2. Disconnect the battery plug at the chassis. Discon-
nect platform cable and foot switch cable, if appli-
cable, from railing. Route the cables out through
the hole at the rear of the platform to free platform
of any constraints. If platform is equipped with an
outlet plug, disconnect and route cable out of
platform.
3. Remove the bolts attaching the pins and slide
blocks at each corner to the arm stack. Carefully
remove the four pins attaching the platform to the
arm stack.
4. Lift the platform from the armstack and set aside.
NOTE: When attaching platform back onto scissor arm
assembly, follow removal procedures in reverse
order.
FOR MACHINES EQUIPPED WITH LOAD SENSING SYSTEM (LSS),
ENSURE ARROWS ON THE LSS PIN ARE POINTING DOWN
3121656
CAUTION
NOTICE
SECTION 3 - CHASSIS & SCISSOR ARMS
BEFORE INSERTING BOLTS INTO PIN. NOT APPLICABLE FOR
MACHINES WITHOUT LSS.

3.15 SCISSOR ARMS REMOVAL

1. Remove platform (refer to Section 3.14, Platform
Removal).
2. Disconnect all wiring and cables attached to scis-
sor arm assembly.
3. Remove lift cylinder (refer to Section 4.7, Lift Cylin-
der Removal).
4. The scissor arms can be removed as a complete
unit or individually.
Removing scissor arm assembly as a complete unit:
1. Remove the pin attaching the bottom scissor arms
to the rear of the frame by removing the bolt.
2. Place two straps around each end of the the entire
scissor arm assembly. Using an overhead crane,
slowly and carefully move the arm stack forwards
so that slide blocks at front of machine slide out
the front of the slide channel on the frame.
NOTE: Overhead crane and straps must be capable of lifting
at least 1545 lbs (701 kg).
3. Once slide blocks are clear of machine, the scissor
stack can be moved to a more desirable location
for further arm disassembly.
Removing scissor arms individually:
1. Start with the top arms (closest to platform).
2. Secure each arm section being removed using an
overhead crane with suitable lifting straps.
3. Remove the bolts securing the connecting pins in
place.
4. Remove the pins from the arms.
5. Remove the arm section from the machine using
the overhead crane.
6. Repeat previous steps for remaining arm sections.
NOTE: When attaching scissor arm assembly back onto
frame, follow removal procedures in reverse order.
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.
– JLG Lift – 3-39