Functional requirement of water tender

 Requirement

Tank capacity                                                                 2700 to 3600 litres
Gross vehicle weight                                                     Not less than 8500 kg including crew, water and                                                                                               equipment
Maximum speed on level road                                      72 km per hour
Acceleration from a standing start                                50 km per hour in 45 sec
through the gears
When breaks are applied it should stop within 15 m from the point the breaks are applied when the tender is moving at 48 km per hour.

Dimension

Wheel base                             Not less than 4.50 m
Turning circle, diameter         Not less than 20 m
Road clearance                       Not less than 23 m
overall width                          Not less than 2.50 m

Design and construction

It shall be vary from 2700 to 3600 litres depending upon type of chassis used.
A tank should be constructed of mild steel treated for anti corrosion and mounted in such a manner than it is equally distributed to all axle of tender.
The tank body and baffles except bottom shall be minimum 3 mm thick sheet which should be of minimum 3 mm thick sheet which should be of minimum 4 mm thick. There should be minimum 2 baffles for 2700 litres water tank and 3 baffles for higher capacity.
The tank shall be fitted with a 75 mm bore overflow pipe. A 63 mm instantaneous hydrant connection, incorporating a strainer, shall be provided for filling the tank through 50 mm bore pipe work. An 100 mm bore pipeline shall be taken from the tank for the suction inlet of the pump incorporating an 100 mm quick spherical type valve.
Dial gauge water level indicator for the tank shall be provided preferably in the driver’s cab or a visual level gauge of glass tube shall be provided at the control panel calibrated ¼, ½, ¾ and full preferably
calibrated in litres also.

Accessories

a) Fire Bell — 250 mm diameter fire bell shall be mounted externally and shall be capable of being operated from within the driving compartment. The bell shall be of the hand-operated type.

Head Lamps — two

c) Fog Lamps — two

d) Reversing Light — a lamp suitably situated to assist reversing.

e) Ambar Blinker Lights — situated on the head of the driving

compartment.

f) Trafficators — Illuminated with indicating light on instrument

panel or in any other prominent position in driving compartment.

g) Wind Screen Wippers

h) Tools — All tools required for normal routine maintenance of the

appliance which are not included in the kit for the chassis.

j) Siren — Battery operated

k) Search Light — adjustable to given flood or beam light, mounted in a convenient position but capable of being readily disconnected and mounted on a tripod away from the appliance, complete with tripod and with not less than 30 m of TRS cable on a reel mounted on the appliance.

m) Spot Light — adjustable, mounted in a convenient position on

the rear side of the driving compartment.

n) Inspection Lamp — protected type on wander lead with plug. A socket shall be provided in the control panel in the driver’s cab for plugging in the lamp.

p) Tail Lamps — two of combined stop and tail.

q) Rear Reflectors

r) Cab, Instrument Panel and Locker, Light

s) Public Address System (if required) — battery operated system with mike in the driver’s cab and speaker on the top of the vehicle shall be provided.

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