C.E. Niehoff & Co. N7485 Instructions

N7485 Drive End Housing on

CEN P/N N1506-1

Field Replacement Instructions

When replacing the drive end housing on the N1506-1 alternator, follow Figure 1 to remove the
proper through-stud on drive end of shell/stator/fi eld coil assembly.

The new N7485 drive end housing has molded B+ studs and will require the through-stud shown in Figure 1
to be removed to fit the new housing.

Use caution when removing through-stud to prevent damaging stator windings.

CAUTION

Remove this through-stud ONLY

Position center

drain hole facing you

T

T

T

T

Figure 1 — Through-stud Removal

Go to Page 2 and Figure 2 to set new drive end housing in position.

Page 1 of 2

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Position new drive end housing over remaining 8 through-studs as shown in Figure 2.

Torque values for connections:

Phase lead nuts—30 lb. in. 28 V B+ terminal nut—80 lb. in.

Field coil lead nuts—30 lb. in. 14 V B+ terminal nut—80 lb. in.

Through-stud nuts—45 lb. in. B– terminal bolt—80 lb. in.

Figure 2 — Setting New Drive End Housing in Position

C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline [phone]

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