Ce-niehoff-co C651 & C654 Alternator Installation User Manual download pdf

II0018BPage 1 of 1

C651 and C654 Alternators

Installation Instructions

C. E. Niehoff & Co

BRUSHLESS ALTERNATORS

This symbol is used to indicate

presence of hazards that can cause

minor property damage.

CAUTION

Install alternator as shown in Figure 1:

Slip bushing located in rear mounting

foot must be securely tightened

against alternator mounting bracket on engine.

Failure to do so can result in broken mounting feet or

broken upper mounting bracket.

1. Units are shipped with shaft collar, hardened

washer and locknut. Remove and discard

shaft collar. Install pulley and furnished

hardened washer. Torque locknut to 163

Nm/ 120 lb. ft.

Figure 1 - C651 and C654 Alternator Installation Details

CAUTION

2. Use hardened washers between aluminum

surfaces and bolt heads and nuts. Torque

mounting bolts to 88 Nm/65 lb. ft.

3. All cabling, wiring or conduit must be sup-

ported within 305 mm/12 in. of termination

on alternator.

4. Choose wire gauge capable of handling

maximum alternator output with minimum

voltage drop:

• 0.4 V for 28 V B+ and B– cables

• 0.2 V for 14 V B+ cable

5. Follow vehicle manufacturer’s recommenda-

tions for belt tension.

6. E terminal requires connection for 28 V

key ignition switch source.

C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633

B– terminal

10mm locknut –

torque to

15 Nm/11 lb. ft.



14 V B+ terminal

8mm locknut –

torque to 15 Nm/11 lb. ft.

12mm/0.50 Locknut –

torque to

88 Nm/65 lb. ft.



Hardened washer

Slip bushing must be tightened against

bracket — see “CAUTION” above

R terminal

6mm locknut –

torque to 4.8 Nm/42 lb. in.



E terminal

5mm locknut –

torque to 2.8 Nm/25 lb. in.



28 V B+ terminal

12mm locknut –

torque to 32 Nm/24 lb. ft.



Cable support brackets

(cables must fit securely inside

bracket insert)



Pulley locknut –

torque to

163 Nm/120 lb. ft.



5mm x .8 x 16 flanged lock screws –

torque to 8.5 Nm/75 lb. in.



C651 and C654 Alternators 1

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Page 1 - C651 and C654 Alternators

II0018BPage 1 of 1C651 and C654 AlternatorsInstallation InstructionsC. E. Niehoff & Co.BRUSHLESS ALTERNATORSThis symbol is used to indicatepresenc

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Ce-niehoff-co C651 & C654 Alternator Installation User Manual

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