Dietz 7-40

MtnMan

Senior Member
7-40 is the manufacturer’s model number. The other codes are SAE approvals. W3 means 360 warning lights, and 70 and 80 refer to the year. As Dan said, same light, but different decades.
 
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K

kcid_66

Registered Member
7-40 is the manufacturer’s model number. The other codes are SAE approvals. W3 means 360 warning lights, and 70 and 80 refer to the year. As Dan said, same light, but different decades.
Thank You Sir, I was just going to ask that question. Would you know what replacment bulbs they would take?

Dietz lens markings Dietz 234 or DZ 77-234 depending on age.

Michael
Thank You, Sir very helpful.

Dietz lens markings Dietz 234 or DZ 77-234 depending on age.

Michael
Thank You very helpful
 

dmathieu

Premium Member
Both will fit both lights. 4416 was standard in the older light, 7400 standard in the newer, but both bulbs will fit both lights. Same size bulbs, PAR36.
 

cmb56

Member
PAR is a definition of the size of a sealed beam.
PAR means ”Parabolic Anodized Reflector”.

The normal types of sealed beams used in warning lights are either PAR36 and PAR46.

PAR36 is 36 eights-of-an-inch in diameter = 4 1/2”
PAR46 is 46 eights-of-an-inch in diameter = 5 3/4”

Michael
 
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kcid_66

Registered Member
No, PAR36 is the size of both of those sealed beam bulbs.
Thanks Again

PAR is a definition of the size of a sealed beam.
PAR means ”Parabolic Anodized Reflector”.

The normal types of sealed beams used in warning lights are either PAR36 and PAR46.

PAR36 is 36 eights-of-an-inch in diameter = 4 1/2”
PAR46 is 46 eights-of-an-inch in diameter = 5 3/4”

Michael
Thank You Sir, Very helpful.
 

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