C.E. Niehoff N1601 Alternator Installation guide

Brand: C.E. Niehoff

Model: N1601 Alternator

Type: Installation guide

CHARGING AND POWER MANAGEMENT SOLUTIONS

C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633

Page 1 of 2

N1601 Alternator

Installation Instructions

II58B

4. Tension belt to vehicle manufactuer’s specications.

5. Connect vehicle B+ cables to alternator B+ terminals. Con-

nect interconnect cable between both B+ terminals. Install

hardware on B+ terminal in stacking order shown in Figure 2.

Torque to 20 Nm/15 lb. ft.

6. Connect vehicle B− cable to alternator B− terminal. Con-

nect interconnect cable between both B‒ terminals. Install

hardware on B‒ terminal in stacking order shown in Figure 3.

Torque to 9 Nm/7 lb. ft.

Wire gauge for alternator output and intercon-

nect cables must be capable of handling maxi-

mum alternator output with minimum voltage

drop. All cables must be supported within 300

mm (12 in.) to prevent twisting, loosening, and

damage to terminals.

7. If regulator was supplied separately, install regulator accord-

ing to instructions on page 2.

N1601 Alternator Installation

CEN model N1601 is a hinge mount, negative ground alternator

rated at 28V/400A. Follow these instructions to ensure proper

installation.

1. Alternators not shipped with pulley are shipped with shaft

collar, disc spring washer, and nut installed. Remove and

discard shaft collar. Make sure Woodru key is securely

wedged in slot in shaft.

2. Install pulley with furnished at washer and lock nut. Torque

pulley nut to 163 Nm/120 lb. ft. See Figure 1.

Do not hammer pulley when installing

pulley on shaft. Carefully slip-t pulley over

shaft to prevent woodru key from moving

out of place.

3. Install alternator on mounting bracket according to vehicle

manufacturer’s specications. Use hardened at washers

between mounting surfaces and bolt heads or lockwash-

ers. Mounting bolts should be Grade 5 (Metric Grade 8.8),

minimum.

CAUTION

NOTICE

B+

interconnect

cable terminal

B+ vehicle

cable terminal

Flat

washer

Bolt, .375-16

Torque to 20 Nm/15 lb. ft.

Lock

washer

Figure 2: B+ Terminal Hardware

Stacking Order

B‒

interconnect

cable terminal

B‒ vehicle

cable terminal

Flat

washer

Bolt, .3125-18

Torque to 9 Nm/7 lb. ft.

Lock

washer

Figure 3: B‒ Terminal Hardware

Stacking Order

Figure 1: N1601 Alternator Installation

B+ interconnect

cable

B+ vehicle

cable

B+ vehicle

cable

B‒ vehicle

cables

B+ terminal B+ terminal

B‒ terminal

Woodru

key

Lock nut

Torque to 163

Nm/120 lb. ft.

.375-16 threaded

insert, self locking

Flat

washer

Pulley

B‒ terminal

B‒

interconnect

cable

CAUTION

Slip bushing in

rear mounting

foot must be tightened against

mounting bracket to prevent

damage to mounting feet and

bracket. Slip

bushing

Hardened

washer

Engine

bracket

C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633

Page 2 of 2Page 2 of 2Page 2 of 2Page 2 of 2

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

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

TEL: 800.643.4633 USA and Canada • TEL: 847.866.6030 outside USA and Canada • FAX: 847.492.1242

E-mail us at service@CENiehoff.com

II58B

Regulator Installation

1. If applicable, turn regulator over and make sure set point of

switch at bottom of regulator is appropriate for type of battery

used in vehicle. If necessary, change switch set point. See

Figure 4 and Table 1 for voltage set point options.

2. Mount regulator on alternator or remotely1 with included

hardware as shown in Figures 5 and 6.

3. Securely plug alternator-to-regulator harness into receptacle

on regulator. See Figures 5 and 6 for receptacle location.

4. Connect regulator terminals as required by vehicle:

• IGN/E terminal (required) must receive voltage from

vehicle switched DC ignition source or multiplex in order

to energize regulator. Torque to 3.4 Nm/30 lb. in. See

Figure 5 and 7.

Voltage should be present at IGN terminal

when ignition is on or engine is running. No

voltage should be present when ignition is o

or engine is not running.

• P/AC terminal (if required) taps AC voltage from alterna-

tor, typically half the charge voltage (3A maximum). P/AC

terminal provides alternator RPM frequency at 10:1 ratio

for use with tachometer. Torque terminal hardware to 3.4

Nm/30 lb. in. See Figures 5 and 7.

If using relay for R/P/AC circuit, coil must be

diode-protected and properly rated.

• If using a J1939/temperature-voltage sense harness, plug

J1939 harness into J1939 receptacle on regulator. See

Figure 7 for receptacle location. Refer to instructions

included with harness for more information. Harness sold

separately2.

NOTICE

Figure 5: Typical Regulator Connections

terminal

IGN

terminal

Flat washer

Lock washer

Hex screw, 10-32

Torque to 3.4 Nm/30 lb. in.

(2 plcs.)

Hex screw, .25-28

Torque to 8.5 Nm/75 lb. in.

Lock washer

Flat washer

Alternator-to-regulator

harness connector

Figure 7: N3257 Regulator Connections

terminal

IGN

terminal

Alternator-to-regulator

harness connector

J1939/temp/voltage

harness connector

Status LED

1. Contact CEN for regulator extension harness options.

2. Contact CEN for alternative sensor/harness options

NOTICE

Figure 4: Regulator

Voltage Selection Switch

Table 1: Regulator Switch Settings

Position Temperature Compensation

1 Hawker/6TAGM

2 6TMF only

3Hawker/6TAGM & 6TMF

4 Other types

Figure 6: Regulator Installation

Regulator Alternator -to-

regulator harness

Harness bracket (remote

mounted regulator

applications only)

568A

(Cap o)

Vehicle

harness (ref)

C.E. Niehoff N1601 Alternator Installation guide

C.E. Niehoff N1601 Alternator Installation guide

C.E. Niehoff N1601 Alternator Installation guide

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