C.E. Niehoff & Co. C672 Installation

C672 Alternator

Installation Instructions

This symbol is used to indicate presence

CAUTION

of hazards that can cause minor property
damage.

1. Install alternator as shown in Figure 1:

Slip bushings located in front and
rear mounting lugs must be
securely tightened against alter­ nator mounting bracket on engine.
Failure to do so can result in
broken mounting lugs or broken
mounting bracket.

CAUTION

a. Use hardened washers between aluminum

surfaces and bolt heads and nuts. Bolts to be
SAE grade 5 min., metric class 8.8 min.

b. OEM units are shipped with pulley, disc spring

washer and locknut installed.

c. Aftermarket units are shipped with shaft collar,

disc spring washer, and nut. Remove and dis­ card shaft collar. Install pulley and furnished
disc spring washer. Torque nut to 163 Nm/
120 lb. ft.

d. Follow vehicle manufacturer’s recommendations

for belt tension.

2. All cabling, wiring or conduit must be supported
within 305 mm/12 in. of termination on alternator.

3. Choose wire gauge capable of handling ma ximum
alternator output with no more than 0.4 V drop on
each leg from alternator to battery.

4. Regulator is furnished with OEM units and is sup­plied separately by request with aftermarket units.
Mounting screws on regulator should be torqued to

8.5 Nm/75 lb. in.

5. Make electrical connections to CEN regulator as
required, using proper ring terminals (follow vehicle
manufacturer’s diagram and separate instructions
packed with extended wiring harness when used):

a. Make sure alternator-to-regulator harness

is plugged securely in regulator receptacle.

b. A2-342 regulator furnished with some units

has additional:

• 3-pin connector for D+/Phase/Eng
connection to vehicle

• J1939 connector to vehicle

Securely attach appropriate vehicle cables to

these connectors as required.

B+ terminal M12 x 1.75 bolt –

torque to 30 Nm/22 lb. ft.

Lock washer

Washer

Slip bushings in front and rear mounting
lugs must be tightened against bracket —
see “CAUTION” above

Hardened washer

M16/0.63 bolt and washer –

torque to 108 Nm/80 lb. ft.

Figure 1 - C672 Alternator Installation Details

B+ terminal –

see inset above

Battery output
cable terminal

3-pin
connector

Bracket

on engine

J1939
connector

Disc spring
washer

M20 nut–torque to

163 Nm/120 lb. ft.

Alternator B– M10x1.5 bolt,
lockwasher and washer—
torque to 15 Nm/11 lb. ft.

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

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