User Manual

above 110°C. This feature allows the alternator to
continue to provide needed power while protecting
internal components from heat damage.
Built for the Long Haul
Bosch 200 Amp School Bus Alternators are designed
specifically for the high electrical loads of today’s
school buses. Their unique ability to replace hundreds
of original equipment part numbers makes them ideal
for service replacement and upgrades to existing
equipment. With only two part numbers replacing over
200 OE SKUs, inventory commitment can be greatly
reduced, saving both time and money. Exclusive
advanced Bosch technology delivers increased service
life and reliability, prolonged battery life and improved
fuel economy.
2-Year Warranty
Bosch backs the AL9962SB and AL9963SB with a
24 month/200,000 mile warranty.
Self Protection, External Heat Dissipating Regulator
is mounted directly in the cool-air intake stream.
Its position, combined with the regulator’s heat
sink design, allows the alternator to run cooler
and dissipate heat quicker than internally-mounted
regulators. Exclusive Bosch self-protection technology
automatically begins to reduce amperage output
when underhood temperatures exceed 125°C allowing
amperage output to return to normal when the
temperature drops below 125°C.
External Heat Dissipating Rectifier, utilizing Bosch
best-in-class press fit diodes, is also mounted in the
cool-air intake stream providing the same cooling
features as the regulator.
Advanced Temperature-Resistant Electronics, like
the integrated-circuit regulator and high-amperage
rectifier, are designed and manufactured by Bosch to
meet the needs of the most demanding school bus
applications.
Dual Internal Cooling Fans optimize the amount of
cooling air being pulled through the unit. Air is drawn
in from both the front and the rear of the alternator
forcing heat out through the vents circling the housing.
Exclusive Bosch Long-Life Bearing Technology couples
special heat-treated, long life steel bearings with
heat-resistant lubricant to withstand heat and wear for
miles of reliable service.
Patented Bosch High-Efficiency Winding Technology
uses 30% more copper than competitive units for
increased efficiency, resulting in fuel savings.
Heavy Duty Slip Ring Technology significantly
diminishes wear on the brushes for longer service life
and greater reliability.
Alternator RPM (000)
0 2 4 6 8 10 12 14 16 18 20
Amps
Output Curve (Figure 1)
Dual Internal
Cooling Fans
Heavy Duty Slip
Ring Design
External
Heat Dissipating
Rectifier
Patented Bosch
High-Efficiency
Winding
Technology
Exclusive
Bosch
Long-Life
Bearings
AL9962SB - pad mount