Chevrolet 1956 Truck Operator's Manual page 63

Maintenance-
The sealed beam headlamp features the T -3 headlamp bulb
unit and a redesigned retaining and mounting ring. The re-
taining ring is held to the lamp body by a spring eliminating
the screw attachment previously used. This feature simplifies
sealed beam replacement as well as eliminates confusion that
existed between retaining ring screws and adjusting screws.
Sealed Beam Unit Replacement
1. Remove three headlamp door retaining screws and
remove door with gasket.
2. Unhook the spring from the retaining ring (fig. 63) and,
holding sealed beam unit, retaining ring and mounting ring
as an assembly, remove mounting ring from adjusting screws.
DO NOT disturb the adjusting screws.
3. Pull assembly forward, disconnect connector plug from
sealed beam unit (fig. 64) and remove assembly.
fig. 63-Unhoolcing Reraining
Ring Spring .'
fig. 64-Disconneding
Plug
4. While holding mounting ring,
lift retaining ring as shown in fig-
ure 65 to release the retaining ring
from the retaining ring tab opposite
spring attachment of assembly. Re-
move retaining ring and sealed
beam unit from mounting ring.
While lifting retaining ring caution
should be exercised to avoid dam-
age to molded lugs on face of T-3
headlamp unit.
5. Place new sealed beam unit
in mounting ring and position unit
so that "top" inscription on front
of glass is to the right of retaining
ring tab. Then index molded lugs
on back of sealed beam unit to
indentations in mounting ring.
6. Index hole in retaining ring
over tab on mounting ring (fig. 65) .
7. Connect plug to sealed beam
unit (fig. 64) and engage mounting
ring adjusting screw tabs with verti-
cal and horizontal adjusting screws.
• 62 •