Windsor-Severence Fire Protection District
Heavy Rescue
Production Specification
SVI #774 Page 42 of 126 April 19, 2010
AIR HORN
The front bumper shall include two (2) Hadley brand E-Tone air horns which shall measure 21.00 inches long with a 6.00
inch round flare. The air horn shall be a trumpet style and shall include a chrome finish on the inside and a black painted
finish on the outside of the trumpet.
AIR HORN LOCATION
The air horns shall be recess mounted in the front bumper face, one (1) on the driver side of the bumper in the inboard
position relative to the left hand frame rail and one (1) on the officer side of the bumper in the inboard position relative to
the right hand frame rail.
AIR HORN RESERVOIR
One (1) air tank, with a 1200 cubic inch reservoir, shall be installed on the chassis to act as a supply tank for operating air
horns. The reservoir shall be isolated with a 90 PSI pressure protection valve on the reservoir supply side to prevent
depletion of the air to the air brake system.
FRONT BUMPER TOW EYES
The bumper shall include two (2) chrome plated tow eyes which shall be installed below the front bumper. The tow eyes
shall be fabricated from 0.75 inch thick 1020 ASTM-A36 hot rolled steel. The inside diameter of the eye shall be 2.00
inches and include a chamfered edge.
CAB TILT SYSTEM
The entire cab shall be capable of tilting 45.00 degrees to allow for easy maintenance of the engine and transmission.
The electric-over-hydraulic lift system shall include an ignition interlock and red cab lock down indicator lamp on the tilt
control which shall illuminate when holding the “Down” button to indicate safe road operation.
It shall be necessary to activate the master battery switch and set the parking brake in order to tilt the cab. As a third
precaution the ignition switch must be turned off to complete the cab tilt interlock safety circuit.
Two (2) spring-loaded hydraulic hold down hooks located outboard of the frame shall be installed to hold the cab securely
to the frame. Once the hold-down hooks are set in place, it shall take the application of pressure from the hydraulic cab
tilt lift pump to release the hooks.
Two (2) cab tilt cylinders shall be provided with velocity fuses in each cylinder port. The cab tilt pivots shall be 1.90 inch
ball and be anchored to frame brackets with 1.25 inch diameter studs.
A steel safety channel assembly shall be installed on the right side cab lift cylinder to prevent accidental cab lowering.
The safety channel assembly shall fall over the lift cylinder when the cab is in the fully tilted position. A cable release
system shall also be provided to retract the safety channel assembly from the lift cylinder to allow the lowering of the cab.
CAB TILT AUXILIARY PUMP
A manual cab tilt pump module shall be attached to the rear surface of the driver side battery box.
CAB TILT LIMIT SWITCH
A cab tilt limit switch shall be installed. The switch will effectively limit cab's travel when being tilted. The final adjustment
of the switch shall be performed by the apparatus manufacturer to prevent damage to the cab or any bumper mounted
option mounted in the cab tilt arc.
(112 paginas)
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