1.4 EQUIPMENT DESCRIPTION
1.4.1
Intended Usage
The Wollard Model TMPS-200 is a mobile aircraft boarding facility for large
transport-type aircraft. The height of the stair is hydraulically adjustable and will
accommodate aircraft having door thresholds ranging from approximately
101-200 inches (256 cm to 508 cm) above the ground.
The design is not intended to service any other type of vehicle or any type of
structure.
1.4.2
Description of the Passenger Stair
The entire stair assembly is mounted on a heavy-duty commercial chassis with
dual rear wheels. Special equipment, steel supporting structures, electrical and
hydraulic components have been installed on the basic vehicle. Some minor
alterations have also been made to the vehicle's chassis and body.
The passenger stair consists of these major components: a truck section, a main
stair section (the stationary unit), and a main support frame which supports the
main stair section. The main support frame is equipped with a hydraulically
actuated upper section. An independent hydraulic system supplies hydraulic
power to operate the adjustable stair unit and stabilizers. The hydraulic functions
are controlled by electrical switches installed in the truck cab.
1.4.3
Reserved For Future Use
1.4.4
Hydraulic Hand Pump
Operates stabilizers when there is no power to drive main hydraulic pump.
1.4.5
Truck Section
The truck section consists of a heavy-duty commercial truck chassis having a
gross vehicle weight of 11,000 pounds (4,990 kg). An automatic transmission is
standard equipment (a 5-speed manual transmission is optional). A hydraulic
pump with a magnetic clutch controlled by the master switch is mounted in the
engine compartment and is driven by the engine serpentine belt.
1.4.6
Lighting
For night operation, the following lighting is provided:
•
lighting in the inner panel at each stair tread
•
illumination of the bottom step
JANUARY 31, 2014
CHAPTER 1 GENERAL INFORMATION & OPERATION INSTRUCTIONS
PAGE 6
1 DESCRIPTION
Truck Mounted Passenger Stair TMPS-200
Manual No. 307559