Harley Davidson (1970 to 1978) Sportster XL/XLH/XLCH/XLT-1000. Service manual - page 13
LAMPS
HEADLAMP
the headlamp is a sealed beam type, specially designed and made for
Harley-Davidson motorcycles. When replacement is required, use only the
prescribed sealed beam unit. If either filament burns out. or the lens
breaks, the entire unit must be replaced.
To remove sealed beam unit, remove screw from outer clamping ring. Pry
unit from rubber mounting and pull connector block from unit prongs.
Assembly is the reverse order of disassembly. Be sure connector block
contacts are clean to ensure a good electrical contact. After final
assembly, readjust headlamp as described under "ADJUSTING BEAM."
Headlamp mounting nut is located under snap plug on mounting bracket.
ADJUSTING BEAM
To get the greatest efficiency from the headlamp and to meet the
requirements of the law, correctly adjust headlamp beam according to the
following instructions.
Draw a horizontal line on a wall or screen exactly the same height as
the center of the headlamp to be checked and adjusted. Then, position
the motorcycle on a level surface with headlamp approximately 25 feet
away from the test pattern. Have a rider sit on the motorcycle to
simulate actual running conditions. Motorcycle must be vertical with
front wheel in straight ahead alignment and tires correctly inflated.
Aim the headlamp directly at the screen and turn on the light switch.
Set beam selector switch on the high beam position, and check beam for
height and direction.
The top of the main beam of light should register even with, but no
higher than the horizontal line of the test pattern.
To aim beam, loosen the headlamp mounting nut and position the lamp to
correctly adjust the beam of light in relation to the horizontal line.
At the same time, turn the headlamp right or left to direct the beam of
light straight ahead. Tighten the clamp nut after the lamp is correctly
adjusted.
