C.E. Niehoff & Co. C725 Installation

C725

Alternator

OEM Installation Instructions

This symbol is used to indicate the

CAUTION

presence of hazards that can cause minor
personal injury or property damage.

1. 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.

CAUTION

a. Use hardened washers between aluminum

surfaces and bolt heads and nuts.
b. OEM units are shipped with pulley, hardened
washer and locknut installed. Locknut should
be torqued to 163 Nm/ 120 lb. ft.
c. Follow vehicle manufacturer’s recommenda­ tions 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 maximum
alternator output with no more than 0.4 V drop
(28 V)/0.2 V drop (14 V) on each leg from
alternator to battery.

4. Regulator is furnished with OEM units.

5. Make electrical connections to CEN regulator,
using proper ring terminals.
a. Make sure alternator-to-regulator harnesses
are plugged securely in regulator receptacles.
b. Connect IGN terminal on regulator to 28 V
keyed ignition switch source. Torque #10-32
terminal nut to 3.4 Nm/30 lb. in.

6. Alternator electrical connections:
a. Connect battery positive cables from vehicle
to alternator 28 V B+ and 14 V B+ terminals.
Torque both 0.50-18 UNC-2A terminal bolts
on alternator to 23 Nm/17 lb. ft.

B+ cables must be supported by
cable clamps within 12’’ of both
B+ output terminals to avoid
premature failure of B+ output
terminals. CEN recommends
using cable clamps attached to
alternator anti-drive end housing
for support.

CAUTION

b. Connect ground cable from vehicle to alter-

nator B– terminal. Torque 0.3750-16 UNC-2A
B– terminal bolt on alternator to 23 Nm/
17 lb. ft.

Terminal bolt–torque to 23 Nm/17 lb. ft.

Battery cable
terminal

Alternator 14 V/ 28 V B+ Terminal Studs
and Alternator B– Te r m i n a l Stud

If you have questions about your a lternator or a ny of these i nstructions, or if you need to locate a Factor y Authorized Service Dealer, please contact us at:

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

Page 1 of 1

Lockwasher

Washer
(on B+ bolts only)

Insulator

Slip bushing must be
tightened against
bracket —
see “CAUTION” above

C725
Alternator

Hardened washer

12mm/0.50 Locknut –

torque to
88 Nm/64 lb. ft.

Figure 1 - C725 Alternator Installation Details

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

E-mail us at [e-mail]

Bracket
on engine

II208A