C.E. Niehoff & Co. C626 Alternator Installation - Manual

II172A
Page 1 of 2
C626 Alternator
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:
Both slip bushings located in rear
modified mounting foot must be
securely tightened against
alternator mounting bracket
on engine. Failure to do so
can result in broken mounting
feet or broken mounting bracket.
a. Use hardened washers between aluminum
surfaces and bolt heads and nuts.
b. OEM units are shipped with pulley, disc
spring washer and locknut installed.
c. Aftermarket units are shipped with shaft
collar, disk spring washer, and nut. Remove
and discard shaft collar. Install pulley and
furnished disk spring washer. Torque nut to
163 Nm/ 120 lb. ft.
d. Follow vehicle manufacturer’s recommen-
dations for belt tension.
2. All cabling, wiring or conduit must be supported
within 305 mm/12 in. of termination on alterna-
tor.
Figure 1 - C626 Alternator Installation Details
CAUTION

Hardened washer

3. Choose wire gauge capable of handling maxi-
mum 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.
A2-337 regulator:
See page 2 for regulator mounting instructions.
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. A2-141 regulators have an M6 stud P termi-
nal and an M5 stud D+ terminal. Torque
terminal nuts with disc spring washers to
4.5 Nm/40 lb. in.
• P terminal taps AC voltage, typically half the
charge voltage.
• D+ terminal provides 28 VDC voltage out-
put to multiplex controller. When connecting
D+ terminal to controller through a relay,
the relay coil must be diode protected and
rated for proper voltage.
c. A2-337 regulator: See page 2 for regulator
electrical
connections.
M12/0.50 bolt and washer –
torque to 81 Nm/60 lb. ft.
Slip bushing must be tightened against
bracket — see “CAUTION” above

Bracket
on engine
Alternator B- M10x1.5 bolt,
lockwasher and washer—
torque to 15 Nm/11 lb. ft.

Alternator B+ M12x1.75 bolt–torque to 32 Nm/23.5 lb. ft.
Washer
Battery output cable terminal
Lockwasher



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