C.E. Niehoff & Co. C616 Alternator/A8-205 Rectifier/A2-136 Regulator Installation User Manual

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II0099A

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

A2-136 Regulator

1. Mounting location of regulator must provide

protection from water, road debris, or
chemicals.

Regulator can be located up to 18 inches
away from the rectifier. If extension harness
CEN A9-448 is added, the regulator can be
moved an additional 43 in. away.

2. See Figure 3 for torque values.

Figure 3 - Regulator Installation

#10-32 x .62 flange lock screw (4 places) -

torque to 8.5 Nm/75 lb. in.

Wiring Connections

1. Alternator phase cable:

a. Remove and save terminal cover screws and

terminal cover.

b. Connect phase cable into terminal block on top

of alternator either through anti-drive end (as
shown in Figure 4) or through drive end:
1) Run phase cable through cable bracket

mounted in one of two locations (LOC. A
or LOC. B). See Figure 4.

Figure 4 - Electrical Connections

B+ terminal bolt –

torque to 30 Nm/22 lb. ft.

Battery output cable terminal

Washer

Lockwasher

Insulator

TTTTT T T T T T

TTTTT

T T T T T

B– terminal bolt –

torque to 30 Nm/22 lb. ft.

TTTTT

Phase terminal bolts (3 places) –

torque to 9 Nm/80 lb. in.

Screws –

torque to 6.7 Nm/60 lb. in.

TTTTT

R and E

terminal nuts –

torque to

3.4 Nm/30 lb. in.

Field inline connection

TTTTT

2) Use torque values shown to fasten cables

to terminal block.

3) Coat terminals with Dow Corning® 1-2577

Low VOC RTV coating or equivalent. Do not
use coating containing acetic acid (vinegar
smell) on electrical components.

c. Replace terminal cover on terminal block. If

phase cable was routed through the anti-drive
end, the terminal cover must be rotated 180º
before re-installing. Use torque value shown to
fasten screws in terminal cover.

2. Connect remaining harnesses between components

as shown in Figure 4. Use torque values shown.

3. Choose wire gauge for B+ and B– cables capable of

handling maximum alternator output with minimum
voltage drop.

4. Connect E terminal on regulator to ignition source

through oil pressure switch, using #10 ring
terminal. Torque #10-24 terminal nut to 3.4 Nm/30
lb. in.

5. If required, connect R terminal to tachometer or

relay, using 1/4 in. ring terminal. Torque terminal
nut to 3.4 Nm/30 lb.in.

Sealing Wiring Connections

1. On ALL metallic electrical connections to rectifier

(including B+ and B– connections), alternator,
regulator, and their harness connectors, apply Dow
Corning® 1-2577 Low VOC RTV coating or equiva-
lent. Do not use coating containing acetic acid
(vinegar smell) on electrical components.

2. At regulator harness connections, apply coating as

described in step 1, then wrap connection in
electrical tape from sleeve to sleeve.

Field

inline

connection

TTTTT

B+

(see

inset above)

B+ Terminal Connection

Phase terminal bolts (3 places) –

torque to 8 Nm/70 lb. in.

Terminal cover screws –

torque to 3.9 Nm/35 lb. in.

Cable bracket

LOC. A

TTTTT

Cable bracket

LOC. B

Phase

cable

TTTTT