SJRT Compact Series
Engine Powered December 2007 Page 39
TM
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.
• One compartment contains the engine, 12V
battery, base control console and electrical
components. The other compartment contains
the emergency lowering system, brake release
and hydraulic components as well as fuel and
hydraulic tanks.
• The propane cylinders (if equipped) are located on
both sides of the hydraulic/fuel compartment.
• The four wheels are hydraulically-motor driven
with two front wheels steerable by a hydraulic
cylinder.
• The rear wheel motors have spring-applied
hydraulically released disc brakes.
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” deck surface and 39”
hinged guardrails with 6” toe boards and mid-rails. The
platform can be entered from the rear through a spring
returned gate with latch. The platform is also equipped
with a manual extension platform. A 110V 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
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