C.E. Niehoff & Co. C653/C653A Alternator Installation - Manual

II25E
Page 1 of 2
C653 and C653A 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
mounting 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. OEM units are shipped with pulley, hardened
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
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 maximum
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 sup-
plied separately by request with aftermarket units.
Mounting screws on regulator should be torqued to
8.5 Nm/75 lb. in. If regulator is to be remote-mount-
ed, see separate instructions packed with extended
Figure 1 - C653 Alternator Installation Details
CAUTION

Hardened washer

wiring harness. A2-338 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. A2-146/A2-153 regulators have P terminal with
M6 stud and D+ terminal with M5 stud. Torque
terminal nuts to 4.5 Nm/40 lb. in.
• P terminal taps AC voltage, typically half the
charge voltage.
• D+ terminal provides 28 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.
c. A2-214 regulator has P and D+ terminals with
M6 studs and an IGN terminal with an M5 stud.
Torque terminal nuts to 4.5 Nm/ 40 lb. in.
• P terminal taps AC voltage, typically half the
charge voltage.
• Optional D+ terminal provides 28 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.
d. A2-338 regulator: See page 2 for regulator
electrical
connections.
12mm/0.50 Locknut –
torque to
88 Nm/65 lb. ft.
Slip bushing must be tightened against
bracket — see “CAUTION” above

Bracket
on engine
B– terminal
M10 locknut –
torque to 15 Nm/11 lb. ft.

M12x1.75 bolt–torque to 61 Nm/45 lb. ft.
Washer
Battery output
cable terminal Lockwasher
Insulator 




C653
ADE View
C653A
ADE View
Alternator B+ Terminal Stud