Major Assemblies; Base; Platform; Serial Number Nameplate - Skyjack SJIII 3219 Operating Manual

Section 3 - Operation

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 swing out trays.
SJIII 3219:
One tray contains the hydraulic and electrical
components. The other tray contains four (4) 6 volt
batteries. The charger is located at the rear of the
aerial platform. The front axle has two hydraulic
motor-driven wheels, steerable by a hydraulic
cylinder. The rear axle is fixed and has non-driven,
spring-applied, hydraulically released brake.
SJIII 3226 & 4632:
One tray contains the hydraulic and electrical
components. The other tray contains battery
charger and four (4) 6 volt batteries. The front axle
has two non-driven wheels, steerable by a hydraulic
cylinder. The rear axle has two hydraulic motor-
driven wheels with spring-applied, hydraulically
released 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 pump,
driven by an electric motor, 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. An AC outlet is also
located on the platform.
SJIII DC Electric

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
• Date manufactured
Major Assemblies
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