DETROIT DIESEL 53
Battery-Charging Generator 7.1
3.
While supporting the generator. remove the adjusting strap bolt and washers and the mounting bolts, washers and
nuts. Then remove the generator.
4.
Remove the pulley assembly if the generator is to be replaced.
Install Generator
1.
Install-the generator drive pulley, if it was removed. Tighten the pulley retaining nut to 60 lb-ft torque.
NOTE: If the pulley was not removed. check the retaining -nut for proper torque.
2.
Position the generator on the mounting brackets and start the bolts, with lock washers, through the bolt holes in the
generator end frames. If nuts are used, insert the bolts through the bolt holes and then install the lock washers and nuts.
3.
Align the threaded hole in the extension ear of the drive end frame with the slot in the adjusting strap. Start the
bolt, with the lock washer and plain washer, through the slot of the adjusting strap and into the threaded hole in the
generator end frame.
4.
Place the drive belts in the grooves of the pulleys.
5.
Adjust the generator belt tension as outlined in Section 15.1.
6.
Attach the wires and cables. Be sure that each one is correctly installed in accordance with its previous location on
the generator. Keep all connections clean and tight.
Alternator Precautions
Precautions must be taken when working on or around alternators. The diodes and transistors in the alternator circuit are
very sensitive and can be easily destroyed.
Avoid grounding or shorting the output wires or the field wires between the generator and the regulator.
Grounding an A.C. generator's output wire or terminals, which are always "hot" regardless of whether or not the engine is
running, or accidental reversing of the battery polarity will destroy the diodes. Grounding the field circuit will also result in
the destruction of the diodes. Some voltage regulators provide protection against some of these circumstances.
However, it is recommended that extreme caution be used.
May, 1971 SEC. 7.1 Page 3
