Major Assemblies; Base; Lifting Mechanism; Platform - Skyjack SJ 3219 Operating Manual

Section 2 - Operation

2.3 Major Assemblies

The aerial platform consists of three major assemblies:
base, lifting mechanism and platform.

2.3-1 Base

The base is a rigid, one-piece weldment which supports
two swing out trays.
On Models 3215 and 3219 (Compacts):
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.
On Models 3220, 3226, 4620, 4626 and
4632 (Conventionals):
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.

2.3-2 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.

2.3-3 Platform

The platform is constructed of a tubular support frame,
a skid-resistant "diamond plate" deck surface and 1.1 m
hinged guardrails with 0.15 m 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 Compacts & Conventionals

2.4 Serial Number Nameplate

The serial number nameplate, located at the rear of the
aerial platform, lists the following:
• Model number
• Serial number
• Capacity and maximum number of persons
permissible on the platform
• Maximum wind speed
• Maximum manual force
• Machine weight
• Drive height
• Platform height
• System pressure
• Lift pressure
• Wheel load
• Voltage
• Maximum incline
• Year of manufacture
December 2007
Major Assemblies
TM
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