Rough Terrain Scissors
December 2007
Page 43
Section 3 - Operation
Major Assemblies
3.3 Major Assemblies
The aerial platform consists of three major assemblies:
base, lifting mechanism and platform.
3.3-1 Base
The base is a rigid, one-piece weldment which supports
two side compartments.
Models 71xx & 88xx
•
One compartment contains the hydraulic and
electrical components, and base control console.
The other compartment contains the fuel and
hydraulic tanks.
•
The propane cylinder is either located behind the
access ladder or behind the fuel compartment.
•
The front axle is steered by a hydraulic cylinder
and is either non-driven (2WD) or drive shaft/gear
box driven (4WD).
•
The rear axle is drive shaft/gear box driven and
has a spring-applied hydraulically released disc
brake.
•
A roll-out tray at the front of the base supports an
engine coupled with a two-section hydraulic pump
providing power to the hydraulic system.
•
An engine control console is also located at the
front of the base.
•
The 12V starter battery is located in the hydraulic/
electrical compartment or at the front of the engine
roll-out tray.
Model 9250
•
One compartment contains the hydraulic tank,
hydraulic and electrical components, base control
console, emergency battery and starter battery.
•
The other compartment contains the fuel tank and
Liquid Propane (LP) tank (if equipped).
•
The front axle is steered by a hydraulic cylinder
and is drive shaft/gear box driven (4WD).
•
The rear axle is drive shaft/gear box driven and
has a spring-applied hydraulically released disc
brake.
•
A roll-out tray at the front of the base supports an
engine coupled with a two-section hydraulic pump
providing power to the hydraulic system.
•
An engine control console is also located at the
front of the base.
3.3-2 Lifting Mechanism
The lifting mechanism is constructed of formed steel or
tube sections making up a scissor-type assembly. The
scissor assembly is raised and lowered by single-acting
hydraulic lift cylinders with holding valves. A two-section
pump, driven by an engine, provides hydraulic power
to the lift cylinders.
3.3-3 Platform
The platform is constructed of a tubular support frame,
a skid-resistant “diamond plate” platform surface and
39” hinged guardrails with 6” toe boards and mid-rails.
The platform can be entered from either side through
a spring-returned gate for full size RTs and from the
rear through a spring-returned gate for mid size RTs.
Some full size RTs can be equipped with a front or rear
(or both) extension platform(s). The mid size RTs are
equipped with a front extension platform. Model 9250
is equipped with two powered extension platforms. An
AC outlet is also located on the platform.
3.4 Serial Number Nameplate
The serial number nameplate, located at the rear of the
aerial platform, lists the following:
•
Model number
•
Serial number
•
Aerial platform weight
•
Maximum drivable height
•
Maximum capacities
•
Maximum number of persons permissible on the
platform
•
Voltage
•
System pressure
•
Lift pressure
•
Maximum platform height
•
Maximum wheel load
•
Maximum wind speed
•
Maximum manual force
•
Maximum incline
