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C.E. Niehoff & Co. C527 Alternator Installation User Manual

C527 alternator

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II178A

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Retrofit/Upgrade Installation Instructions

Install alternator as shown in Figure 1:

1. Units are shipped with shaft collar, disc spring

washer and nut. Remove and discard shaft collar.
Install pulley and furnished disc spring washer.

Torque nut to 135 Nm/ 100 lb. ft.

2. Install alternator on pad mount per vehicle manu-

facturer’s instructions, including hardware specifi-

cations and torque.

3. All cabling, wiring or conduit must be supported

within 305 mm/12 in. of termination on alternator.

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

handling maximum alternator output with mini-

mum voltage drop.

5. Install regulator as follows:

A2-334—install regulator on alternator and torque

mounting screws to 8.5 Nm/75 lb. in. Plug alterna-

tor-to-regulator harness securely into regulator.

A2-335—install regulator in remote location as

specified by customer. Plug alternator-to-regulator
harness securely into regulator.

Figure 1—C527 Alternator w/A2-348 Regulator (shown) Installation Details

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

B+ terminal M10x1.5 Bolt –

torque to 15 Nm/11 lb. ft.

B– terminal

M8x1.25 Bolt –

torque to 10.8 Nm/8 lb. ft.

M20x1.5 Nut

torque to 135 Nm/100 lb. ft.

Disc spring washer

A2-348—install regulator on alternator and torque

mounting screws to 8.5 Nm/75 lb. in.
– Plug alternator-to-regulator harness securely

into 5-socket receptacle on regulator.

– Plug temperature sensing/voltage sensing

harness from vehicle into 5-pin receptacle on

regulator.

A2-350—install regulator in remote location as

specified by customer.

– Plug alternator-to-regulator harness securely

into 5-socket receptacle on regulator.

– Plug temperature sensing/voltage sensing

harness from vehicle into 5-pin receptacle on

regulator.

6. Make electrical connections to regulator as

required, using proper ring terminals (follow vehicle

manufacturer’s diagram packed with extended wir-
ing harness when used):

a. Make sure alternator-to-regulator harness

is plugged securely in regulator receptacle.

b. Torque terminal nuts with disc spring washers

to 4.5 Nm/40 lb. in.

• P terminal taps AC voltage, typically half

the charge voltage.

• IGN terminal provides external energize

on A2-334 and A2-335 regulators only.

Regulator P terminal;

torque to 4.5 Nm/40 lb. in.

C527 Alternator

Alternate mounting locations

for A2-348 or A2-334

(3 different locations on

circumference of shell)