Msd Gear Installation on MSD Ford Distributors User Manual download pdf

M S D I G N I T I O N • w w w. m sd ig ni ti on .c om • ( 91 5) 8 5 7- 52 00 • F A X (9 15 ) 85 7- 33 4 4

FRM28590 Revised 05/07 Printed in U.S.A.

Gear Installation on MSD Ford Distributors

It is recommended to send your Ford Distributor to MSD to have a new gear installed. The installa-

tion process requires a press ﬁt and the need for special tools to achieve proper installation without

damaging the shaft, gear or housing. If returning the distributor to MSD is not an option, a quality

machine shop may also be able to install your new gear.

1. With the endplay of the distributor shaft removed, measure the distance from the bottom of the gear

to the bottom of the mounting ﬂange (Figure 1). It should be within the speciﬁcations shown.

2. Scribe a mark on the shaft at the bottom of the gear. This will aid in the installation position of the

new gear.

3. Remove the original roll pin and remove the press ﬁt gear. Use extreme care not to damage the

end of the shaft where it meshes with the oil pump.

4. Position the gear so the new roll pin will enter the shaft 90° from the original hole. (Lining up the

original hole is possible, but a new hole will likely be machined.)

5. Press the new gear into position on the shaft. Measure the distance as shown in Figure 1 before

drilling the new roll pin hole.

6. Carefully drill a 0.125” hole through the shaft using the gear as a guide.

7. Install the new 1/8” spiral roll pin.

CAUTION: If the gear is installed improperly, severe damage to the distributor and/or engine block

will occur!

Press ﬁrmly

to take out

all end play

before mea-

suring.

Thrust Collar

4.005" Max.

3.996" Min.

Figure 1 Gear Installation Speciﬁcations

On the MSD FE Dis-

tributor, PN 8594,

the spec is:

3.045" - 3.050".

1.750"

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Msd Gear Installation on MSD Ford Distributors User Manual