C.E. Niehoff & Co. C627, C628, C656, C657, & C658 Alternator Installation - Manual

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C627, C628, C656, C657,
and C658 Alternators
Installation Instructions
This symbol is used to indicate presence
of hazards that can cause minor property
damage.
CAUTION
1. Install alternator as shown in Figure 1:
Slip bushing located in rear
mounting foot must be securely
tightened against alternator mount-
ing bracket on engine. Failure to do
so can result in broken mounting
feet or broken upper mounting
bracket.
a. Use hardened washers between aluminum
surfaces and bolt heads and nuts.
b. C656/C657/C658 OEM units are shipped with
pulley, Belleville washer, and nut installed.
C627/C628 OEM units are shipped with pulley,
flat washer, and locknut installed.
c. C656/C657/C658 aftermarket units are shipped
with shaft collar, Bellville washer, and nut
installed. C627/C628 aftermarket units are
shipped with pulley, flat washer, and locknut
installed. Remove and discard shaft collar.
Install pulley and furnished washer. Torque
furnished hardware to 163 Nm/120 lb. ft.
d. 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.
Figure 1 - C656 Alternator Installation Details
CAUTION
T
Hardened washer
T
3. Choose wire gauge capable of handling maximum
alternator output with no more than 0.2 V drop on
each leg from alternator to battery.
4. Regulator is furnished on 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. A2-155 regulator connections:
• Plug alternator-to-regulator harness into
regulator.
• Connect IGN terminal to ignition source
through existing switch. Torque M5 terminal
nut on regulator to 4.5 Nm/40 lb. in.
• 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.
6. A2-149 regulator connections:
• Plug alternator-to-regulator harness into
regulator.
• Connect D+ terminal: D+ terminal provides
14 VDC voltage output to multiplex controller.
When connecting D+ terminal to controller
through a relay, the relay coil must be diode
protected and rated for proper voltage. Torque
M5 terminal nut on regulator to 4.5 Nm/
40 lb. in.
• Connect R terminal to tachometer or relay.
R terminal taps AC voltage, typically half the
charge voltage. Torque M6 terminal nut on
regulator to 4.5 Nm/40 lb. in.
12mm/0.50 Locknut –
torque to
88 Nm/65 lb. ft.
Slip bushing must be tightened against
bracket — see “CAUTION” above
T
Bracket
on engine
B– terminal bolt 10mm x 1.5 –
torque to 15 Nm/11 lb. ft.
T
12mm x1.75 bolt –
torque to 32 Nm/24 lb. ft.
Washer
Battery output
cable terminal Lockwasher
Insulator T
T
T
T
T
Alternator B+
Terminal Stud
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633