Honda Csc29 Voltage Regulator Replacement Repair Guide

Difficulty

Difficult

Steps

Time Required

                          45 minutes - 1 hour

Sections

Alternator Front Cover
2 steps
Rectifer Bridge Assembly
6 steps
Voltage Regulator
3 steps

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Introduction

The regulator will increase the field current, (there by strengthening the magnetic field) when the charging system voltage falls below this point, which increases the alternator’s output. However, when the charging system voltage rises above this point, the regulator will decrease field current , which weakens the magnetic field, and decreases the alternator’s output.

What you need

Step 1

              Alternator Front Cover

Remove 4, 7.9mm nuts using a 7.9mm socket driver head
One of the nuts is placed underneath the L-Bracket. Remove the L-Bracket and the 3 circled nuts before attempting to remove the remaining nut
There are two covers that need to be removed from the alternator. This step describes how to remove the back cover.

Remove 4, 7.9mm nuts using a 7.9mm socket driver head

One of the nuts is placed underneath the L-Bracket. Remove the L-Bracket and the 3 circled nuts before attempting to remove the remaining nut

There are two covers that need to be removed from the alternator. This step describes how to remove the back cover.

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Step 2

Pull cover off the body of the alternator
Once you have done this, you should be able to see the internal components of the alternator, particularly the bridge assembly that houses the rectifier, voltage regulator and brushes.

Pull cover off the body of the alternator

Once you have done this, you should be able to see the internal components of the alternator, particularly the bridge assembly that houses the rectifier, voltage regulator and brushes.

Step 3

              Removing the brush assembly.

With the alternator cover removed, use a #2 Phillips screwdriver to remove the two, 6 mm screws that hold the brush cover in place.
Remove the brush cover assembly from the alternator. You might need to insert a needle in the small hole to separate the brushes from the rotor. Pull it out without using much force to avoid damage.
Avoid disconnecting wires unless otherwise specified!

With the alternator cover removed, use a #2 Phillips screwdriver to remove the two, 6 mm screws that hold the brush cover in place.

Remove the brush cover assembly from the alternator. You might need to insert a needle in the small hole to separate the brushes from the rotor. Pull it out without using much force to avoid damage.

Avoid disconnecting wires unless otherwise specified!

Step 4

Use a #2 Phillips screwdriver to remove the two 6mm screws holding down the voltage regulator
There are three screws that attach the voltage regulator to the bridge assembly. One of these screws was removed in the previous step.

Use a #2 Phillips screwdriver to remove the two 6mm screws holding down the voltage regulator

There are three screws that attach the voltage regulator to the bridge assembly. One of these screws was removed in the previous step.

Step 5

Locate and unscrew the 3, 6mm screws holding the bridge assembly in place
There are 4 screws attaching the bridge assembly to the alternator. One of these screws were removed in the previous step.

Locate and unscrew the 3, 6mm screws holding the bridge assembly in place

There are 4 screws attaching the bridge assembly to the alternator. One of these screws were removed in the previous step.

Step 6

Locate the copper leads connecting the stator to the bridge assembly. There are 3 sets of 2 leads on the perimeter of the bridge, making 6 leads total.
These leads must be cut in order to remove the bridge from the alternator. These leads will have to be soldered back together on reassembly. Keep the cut as clean as possible.
Use wire cutters to cut all 6 of the leads on the perimeter of the bridge.

Locate the copper leads connecting the stator to the bridge assembly. There are 3 sets of 2 leads on the perimeter of the bridge, making 6 leads total.

These leads must be cut in order to remove the bridge from the alternator. These leads will have to be soldered back together on reassembly. Keep the cut as clean as possible.

Use wire cutters to cut all 6 of the leads on the perimeter of the bridge.

Step 7

If necessary, use a pry bar to gently raise the top of the bridge assembly off the alternator
Be extremely careful with the pry bar. Excessive force will damage the bridge assembly.
Make sure the cut ends of the copper leads are straight to make bridge assembly easier to pull off.

If necessary, use a pry bar to gently raise the top of the bridge assembly off the alternator

Be extremely careful with the pry bar. Excessive force will damage the bridge assembly.

Make sure the cut ends of the copper leads are straight to make bridge assembly easier to pull off.

Step 8

Remove the lower section of the bridge assembly
Use of a pry bar may be necessary. Be gentle.

Remove the lower section of the bridge assembly

Use of a pry bar may be necessary. Be gentle.

Step 9

              Voltage Regulator

Locate the small metal clasp attaching the voltage regulator to the the rectifier.
Loosen the clasp using a pair of needle-nose pliers

Locate the small metal clasp attaching the voltage regulator to the the rectifier.

Loosen the clasp using a pair of needle-nose pliers

Step 10

Using a pair of wire cutters, cut the copper winding attaching the voltage regulator to the rectifier
Be very careful with any cuts. Keep them as clean as possible, as any severed connections will need to be soldered on reassembly.

Using a pair of wire cutters, cut the copper winding attaching the voltage regulator to the rectifier

Be very careful with any cuts. Keep them as clean as possible, as any severed connections will need to be soldered on reassembly.

Step 11

Remove the voltage regulator from the alternator
When connecting the new voltage regulator, carefully read the manufacturer’s instructions on how to connect it to different types of alternators.

Remove the voltage regulator from the alternator

When connecting the new voltage regulator, carefully read the manufacturer’s instructions on how to connect it to different types of alternators.

To reassemble your device, follow these instructions in reverse order.

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                    Sterling Snow

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Moe Lauzon - Mar 27, 2020

Very good instructions

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