C.E. Niehoff & Co. C680 Installation

C680 Alternator

Installation Instructions

Install alternator as shown in Figure 1:

1. OEM units are shipped with pulley, belleville
washer, and nut installed.

Aftermarket units are shipped with shaft

collar, belleville washer, and nut. Remove
and discard shaft collar. Install pulley and
furnished belleville washer. Torque nut to 163
Nm/120 lb. ft.

2. Install alternator on pad mount per vehicle
manufacturer’s instructions, including hard­ware specifications and torque. Use hardened
washer between aluminum surface and bolt
heads, nuts, ect. Bolts to be SAE grade 5 mini­mum, metric class 8.8 minimum.

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

4. Choose wire gauge for B+ and B– cables ca­pable of handling maximum alternator output
with minimum voltage drop.

5. Regulator is furnished with OEM units and is
supplied separately by request with aftermar­ket units. Install regulator on alternator and
torque mounting screws to 8.5 Nm/75 lb. in.
Plug alternator-to-regulator harness securely
into regulator.

6. Make electrical connections to regulator, using
proper ring terminals:

• Connect IGN terminal to ignition source
through existing switch. Torque M5 termi­ nal nut on regulator to 4.5 Nm/40 lb. in.

• When required, connect P terminal to
tachometer or relay. P terminal taps AC
voltage, typically half the charge voltage.
Torque M6 terminal nut on regulator to

4.5 Nm/40 lb. in.

B+ terminal M12x1.75 Bolt –

torque to 30 Nm/22 lb. ft.

B– terminal M10x1.5 Bolt

(either side) –

torque to 15 Nm/11 lb. ft.

Belleville washer

Regulator IGN terminal;
torque to 4.5 Nm/40 lb. in.

Regulator P terminal;
torque to 4.5 Nm/40 lb. in.

M20x1.5 Nut
torque to 163 Nm/120 lb. ft.

Figure 1—C680 Alternator w/A2-155 Regulator Installation Details

If you have questions about your alternator or any of these instructions, or if you need to locate a Factory Authorized Service Dealer, please contact us at:

TEL: [phone] USA and Canada • TEL: [phone] outside USA and Ca nada • FAX: [phone]

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C. E. Niehoff & Co.• 2021 Lee Street • Eva nston, IL 60202 USA

E-mail us at [e-mail]

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