D399, G399, D398, G398, D379, G379 ENGINES Caterpillar


Magneto Drive

Usage:



Magneto drive rotation (clockwise as seen from rear of engine)

(1) Diameter of drive shaft ... 1.0005-1.0015 in.(25,417-25,443 mm)

Bearing bore ... 1.003-1.005 in.(25,50-25,53 mm)

(2) Diameter of drive shaft front journal ... .6232-.6238 in.(15,829-15,845 mm)

Bearing bore ... .6255-.6275 in.(15,888-15,939 mm)

(3) Torque for drive gear retaining bolt (apply 7M7456 Loctite Sealant to threads) ... 18 ± 2 lb. ft.(2,5 ± 0,3 mkg)

Position of magneto to drive tang:

(A) G399 Engine (both magnetos):

Angle from horizontal ... 30°

(B) G398 and G379 Engines (solid state magnetos):

Angle from vertical* ... 30°


*3N863 and 3N525 Magnetos for G398 Engines need 45°

(C) G398 and G379 Engines (point gap magnetos):

Angle from vertical ... 0°

Caterpillar Information System:

D399, G399, D398, G398, D379, G379 ENGINES Ignition System
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D399, G399, D398, G398, D379, G379 ENGINES Starting Motors
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D399, G399, D398, G398, D379, G379 ENGINES Generators<BR> 5L5750 (12V-35A-Delco-Remy Number 1105148)
D399, G399, D398, G398, D379, G379 ENGINES Alternators<BR> 5L1243 (32V-Delco-Remy Number 1117074)
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D399, G399, D398, G398, D379, G379 ENGINES Prelube Pump Motor; (Later Type)
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