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7501 Strawberry Plains Pike

Knoxville, TN  37924

(800) 862-7223 option 7

FAX:  (865) 281-9844

e-mail:  [email protected]

We want to help!  If you have any comments or difficulty

with this product, please contact technical support at

INSTRUCTION SHEET

Ford Upgrade One Wire Alternators

8-37101, 8-37141, 8-47101, 8-47106, 8-47141, 8-47146, 8-57101, 8-57141, 8-67101, 8-67141

INS306

Revised January 2006

The box contains:  (1) alternator, (1)  adjusting bolt
140A alternators also contain (1) upgrade charge wire

INSTALLATION

These instructions are provided as supplementary
information to the factory service manual instructions for
alternator replacement.

DISCONNECT THE BATTERY.

REMOVE THE OLD ALTERNATOR.  

See the factory

service manual for more details.

INSTALL THE NEW ALTERNATOR.

Mount the alternator and check for interference

with the brackets or

other engine components.

  Start the bolts but do not tighten them at this time.

Check for proper belt alignment. Proper alignment is critical.

Adjust belt tension and tighten belt tension bolt as illustrated in Figure 1.  Do not use heavy tools
to pry on alternator case; hand pressure is adequate.  When an automatic tensioner system is not
installed as is common with “V” belts, tension the belt to the engine manufacture’s specification.
This is typically half an inch of deflection.

Tighten all other bolts.

Run a new 10AWG stranded wire suitable for automotive use from the alternator to the positive
post of the battery or the battery side of the starter relay.  Be sure this wire is secured in the engine
compartment and out of the way of moving parts.  Your speed shop has Powermaster charge wires
for this purpose.  The 140A Powermaster alternators come with an upgraded battery output cable
and this should be used in place of the OE.  If the vehicle has an external voltage regulator, this
should be unplugged.

Note that this Powermaster alternator is a “one wire” alternator.  This means that it only requires the battery cable to operate.
Additional wires connected to the alternator provide optional features such as charging system indicator light function but are not
required.

FIGURE 1

PLEASE KEEP IN MIND...

• ALWAYS wear eye protection when working around batteries.

• ALWAYS disconnect battery ground terminal and cable assembly before

replacing electrical components.

• NEVER disconnect a battery cable or alternator cable and wires when

engine is running.  Transient voltages (spikes) are produced when this

occurs and some of these voltages exceed 200 volts.  This can cause alter-

nator voltage regulator or engine computer failure.

• AVOID short circuits.  When working with live circuits, never jumper

between terminals or from terminals to ground, nor try to trouble shoot by

"sparking" terminals.  Always use a quality voltmeter to check the operation

of live circuits.

• CHECK the battery.  Alternators and batteries work together.  It is important

that the battery be in good condition and fully charged when replacing the

alternator.  Do use an alternator to charge a dead battery.

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