VISION
D R I V E R S H A N D B O O K
86
[CAUTION]
Only add tap water in emergency situations.
A regularly-scheduled bus inspection and maintenance program should be fol-
lowed to prevent coolant losses due to damaged or worn hoses, loose clamps, etc.
If coolant is lost while the bus is in use, and roadside emergency measures are
called for, replenish the coolant with the same premix type and brand if possible.
If the proper coolant is not available, and water must be used, use only de-ionized
water if possible. Ordinary tap water should only be used if proper coolant or de-
ionized water are not available.
Whenever tap water alone has been added, the bus should be taken to a service
facility and the entire cooling system should be completely drained, flushed, and
refilled with premix coolant.
Blue Bird buses equipped with Cummins engines may also be equipped with an
optional coolant filter. The coolant filter should be replaced every 6 months or 6,000
miles; whichever occurs first . The coolant filter element installed at the Blue Bird fac-
tory is compatible with all of the above-described coolants:
B
lue
B
ird
N
umBer
00064641
Shutters
The optional radiator shutters assist in maintaining a constant engine temperature
by limiting the air flow through the radiator. The shutter blades are powered by air
pressure from the brake system on the vehicle. The shutters are controlled automati-
cally by an Alarmstat which is located in the upper radiator hose and an electric so-
lenoid in the air line controlling the shutters. Shutters should be inspected regularly
and kept free of obstructing debris. The pivot points of the louvers and their linkages
should be lubricated annually with an anti-seize compound, such as BB # 2550549.
The shutters must be cleaned and lubricated yearly. More frequent lubrication, espe-
cially during the winter months, is required on buses operating in climates that use
salt and other corrosive elements on the roadways.
Summary of Contents for VISION 2011
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