Mid-Mount Platform Manual

GENERAL
2-1. EQUIPMENT DESCRIPTIQN, CHARACTERI~TICS, & CAPABILITIES
2-1.1 Device Characteristics.
This aerial platform is a mid-mounted behind the cab to a torque box sub-weldment, with front and rear outriggers.
The platform reach is 95 feet above ground, as determined by NFPA 1901. The platform has a 1,000 Ib payload
capacity, at full extension 360 degrees. It is capable of operating on up to a 9-degree slope, with 50 mph wind and
9O-degree water stream at 1,500 GPM.
2-1.2 Ladder Assembly.
Five-section steel lattice aerial ladder, with a safety factor of 2: 1 of the rated load and a stability factor of 1 %: 1. Each
ladder section is trussed vertically and diagonally with round steel tubing.
Ladder extension and retraction motion is provided by dual hydraulic powered cylinders and a cable/pulley system.
Rotation motion is through a 54 in. swing bearing/spur gear, driven by two planetary hydraulic drives. Elevation
motion is through two double acting lift cylinders, giving the ladder the capability of SO below horizontal to 75° above
horizontal.
The ladder is equipped with holding valve cartridges and a rotational brake to restrict ladder movement when system
hydraulic pressure is not present.
2-1.3 Turntable Deck.
The turntable deck construction is with a 1.00 in. thick deck material, coated with a non-skid, chemical resistant
material. Access to the turntable deck is from a set of front body stairwells, located on either side of the truck. The
deck area is illuminated with two lights that are activated by the aerial master switch.
2-1.4 Torque Box and Outriggers.
A welded torsion substructure, with two sets of stabilizers, is bolted to the standard chassis C-channel frame. The
torque box is designed with provisions for an integral ladder storage box, water tank mounting, and water way
plumbing.
The unit is stabilized using level assist front and rear stabilizers, capable of leveling the truck on a go slope. Stabilizer
controls are mounted in the rear of the vehicle and are removable on a coiled cord.
2-1.5 Aerial Power and Control Stations.
The aerial controls are electric over hydraulic, fully multiplexed, and proportional. All controls have fail-safe manual
hydraulic overrides. The engine high idle is microprocessor controlled to automatically adjust the engine rpm to match
hydraulic load requirements.
The lower control station, rear compartment, includes:
. Stabilizer remote control.
. Override switch to override microprocessor. System will record condition at override;
. Emergency Power Unit (EPU) switch;
The turntable control station includes:
. Electronic controls for elevation, extension, and rotation;
. Intercom controls;
. Tip I Tracking light switch;
. Emergency Power Unit (EPU) switch;
.
. Operator's load chart;
Aerial speed switch;