SECTION 4 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
3121788
4-19
4.13 LIFT CYLINDER REMOVAL INSTALLATION
NOTE:
If there is a pump failure, a crane or a forktruck can
be used to raise the platform.
NEVER WORK UNDER AN ELEVATED PLATFORM UNTIL IT HAS BEEN
RESTRAINED FROM MOVEMENT WITH SAFETY PROPS, BLOCKING, OR
OVERHEAD SLINGS.
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.
Use an overhead crane or fork truck to secure the
platform and scissor arms before lift cylinder
removal begins.
2.
Cut any wire ties that attach any cables or hoses
to the lift cylinder.
NOTICE
DISCONNECT MAIN POWER FROM THE BATTERIES BEFORE REMOVING
ANY COMPONENTS FROM THE LIFT CYLINDER ASSEMBLY.
3.
Remove the valve connector, the two hoses and
the manual descent cable from the cylinder.
NOTE:
To avoid having to readjust the manual descent,
remove the large nut located behind the manual
descent bracket as shown.
Also see Figure 3-30. for lift cylinder mounting hard-
ware configurations.
4.
Ensuring that the deck and scissor arms are
properly secure, support the lift cylinder and
remove the lift cylinder pin and rest of the cylin-
der on the arm cross tube directly below the cyl-
inder.
5.
Place the cylinder on a clean workbench.
6.
For installation reverse above steps.
Lift Cylinder - LSS Pressure Sensor Location
Lift cylinders on machines with the Load Sensing System
(LSS) are equipped with pressure sensing transducers.
These sensors are installed on the lift cylinder manifold
block next to the descent valve.
Figure 4-15. LSS Pressure Sensor Location
1.
Lift Cylinder
2.
Cylinder Valve Block
3.
Pressure Sensor 1-
(Torque to 11.1 ft lb (15 Nm))
4.
Sensor 1 - Harness Connector
5.
Pressure Sensor 2-
(Torque to 14 ft lb (19 Nm))
6.
Sensor 2 - Harness Connector
7.
Manual Descent Valve and
Release Cable
MAF10760
1
2
3
5
7
6
4
Go to
Discount-Equipment.com
to
order your
parts
