If your mid-90's Ford has run up it's mileage to about 100 - 150 kmiles or
so, you might want to undertake a quick Saturday project that will probably
save you big bucks -and inconvenience- in the near future.
Check out the back of the alternator to see if the voltage regulator (at the
connector with the smaller wires) is held on by small torx screws.
If so, refurbishing which COULD be better than "rebuilding" - for a guy who
is at all handy should be piece of cake.
- 3/8 or 1/2 inch breaker bar or whatever you use to release belt tensioner,
- approp metric tools for automotive access service.
- 1/4 inch driver and small sockets plus small standard torx bits
- standard size paperclip
- brush replacement set for your year, model and engine
- new belt, optional
- a dab of high temp bearing grease
Release tension and remove the belt, then listen carefully while you spin the
pulley and check for free-spin and listen for bearing singing -you want to
hear little or none- then wiggle the pulley back and forth, no sloppiness
If it fails these, put the belt back on.
Pull the connectors - they may be a little stiff- and unbolt the alternator.
With tape or marker, run a reassembly line from back housing to front housing
Remove the three housing bolts, tap the edges of the front (pulley-side) to
loosen from stator (center section) and pull out by the pulley.
The stator and back housing are connected, dont attempt to separate.
Check commutator (brass rings) for galling and copper incursion into
separator between them... if brush had gone and either is grooved continue
on, the new brushes will just not last as long. Use fine sandpaper to smooth
if ring surface is rough.. DO NOT attempt to sand more than to get the high
Check back bearing for some grease and for no "wash-board" on shaft bearing
This is a break-point: if the bearing/surface or commutator (and SOME brushes
left) is in bad shape, you may want to just reassemble and plan to replace
Remove the torx screws AT THE CORNERS of the regulator and remove it from
Remove the two torx screws that fasten the brush terminals to the regulator
body. make sure not to lose the nuts.
blow or brush dust from brush holders/reg and insert the new springs and
brushes, note that the wire slot aligns brush terminal with proper location,
do rear brush first, sliding straightened clip in to hold it in, then front
brush, sliding clip further in to hold both brushes in
fasten terminals with nuts and torx screws tighten just secure, not "hard".
using just enough grease to "skin" the bearing rollers, lube the shaft
bearing surface... if you're anal and are going to blow dust out of the rear
housing, plug the bearing cavity tightly with paper towel.
remove towel from bearing, reinstall regulator, then carefully slide alt back
together following the marked alignment.
Make sure stator and each housing mate squarely.
Install the three housing bolts and tighten alternately until very secure.
not ultra tight.
Check for free-spin
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Note this is a good alternative to buying a rebuilt as well... get a spare
from a salvage yard and inspect it on the spot. If the alternator has not
overheated or been zapped, there is every reaon to expect the regulator and
diodes to last until the bearings go.
In fact, you dont know that the "rebuilt" hadnt been done exactly like this,
just cleaned up more.