C.E. Niehoff & Co. N2003 Installation
C. E. Niehoff & Co
.
BRUSHLESS ALTERNATORS
N2003 Load and Battery
Control Device (LBCD)
For Use With CEN N1509, N1506-1,
and N1511 Alternators
Installation Instructions
DANGER
CAUTION
1. Install N2003 LBCD in location specified by
vehicle manufacturer. Torque mounting hardware
to 3.39 Nm/30 lb. in. See Figure 2 on page 2.
DANGER
This symbol is used to indicate the
presence of hazards that will cause
severe personal injury, death or
equipment damage.
This symbol is used to indicate the
presence of hazards that can cause
minor personal injury or equipment
damage.
Do not exceed recommended
torque. Component damage
will result.
24 V
FROM
ALTERNATOR
2. Jam nuts must be in position and tightened to
specifications before installing remaining cables
and hardware.Connect cables as shown in Figures 1
and 2 in proper stacking order. Hold jam nuts with
19mm wrench while tightening the 8mm clamping
hex nuts to specifications shown in Figure 2.
DANGER
CAUTION
3. Simple wiring schematic is shown on page 2.
4. Test components to make sure they operate
properly.
TT
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Do not exceed recommended
torque. Component damage
will result.
Support cables within 305 mm/
12 in. of LBCD. Failure to
do so can cause component
damage.
24 V
FROM
BATTERY
24 V LOAD
12 V LOAD
12 V
FROM
ALTERNATOR
TT
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T
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TT
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TT
TT
T
Figure 1 - Cable Arrangement (See Wiring Diagram on Page 2)
12 V
FROM
BATTERY
II0033EPage 1 of 2
Cable from battery
Lockwasher
TT
TT
T
TT
TT
T
M8 Clamping hex nut –
torque to 17.7 ±1.4 Nm/144 ±12 lb.in.
TT
TT
T
TT
T
TT
DANGER
Do not exceed
recommended torque.
Component damage
will result.
Use 19mm wrench to hold jam nut
(10.9Nm/96 lb. in. torque
applied to jam nut at factory)
M5 x .8 Bolt – torque to
6.8 ±1.4 Nm/60 ±12 lb.in.
DANGER
Do not exceed
recommended torque.
Component damage
will result.
TT
TT
T
TT
TT
T
TT
TT
T
Lockwasher
Cable from alternator
Note: A cap is factory-installed
on N2003-1 models only.
TT
TT
T
Figure 2 - Stacking Order and Torque
24 V BATT
24 V LOAD
12 V LOAD
12 V BATT
Figure 3 - Simple Wiring Schematic
C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633
II0033EPage 2 of 2
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