Porter-Cable 3807 User Manual download pdf (Page 17)

4. Remove arbor screw (E) Fig. 52, by turning screw

(E) clockwise while at the same time pressing in on arbor

lock (F) Fig. 53, to keep arbor from turning. Remove

screw (E) Fig. 52, out side blade flange (H) and blade (J).

DO NOT REMOVE INSIDE BLADE FLANGE.

5. Make sure the inside surfaces of both the inside and

out side blade flanges are clean and free from any

foreign subst ance.

6. Make sure the inside blade flange is completely on

the arbor with the flat s in the flange engaged with the

flat s on the arbor.

7.Inst all new blade (J) Fig. 52, out side blade flange

(H) and arbor screw (E). T urn arbor screw (E)

counterclockwise to tighten while pressing in on arbor

lock (F) Fig. 53, to keep arbor from turning.

IMPORTANT:Make sure flat s in out side blade flange

(H) Fig. 52, are engaged with flat s on arbor shaf t and that teeth of saw blade (J) are pointing down at the front,

as shown in Fig. 52.

8. Rot ate arbor cover (C) Fig. 51, until hook in cover is engaged under screw (B) and tighten screw (B) which

was loosened in STEP 2.

BRUSH INSPECTION AND REPLACEMENT

CAUTION: BEFORE INSPECTING BRUSHES, DISCONNECT THE MACHINE FROM THE POWER

SOURCE.

Brush life varies. It depends on the load on the motor. Check the brushes af ter the first 100 hours of use for a new

machine, or af ter a new set of brushes has been inst alled.

Af ter the first check, examine them af ter about 10 hours of use until such time that replacement is necessary.

The brush holders (A) Fig. 54, are located on the motor housing opposite each other. Fig. 55, illustrates one of

the brushes removed for inspection. When the carbon on either brush (B) is worn to

… 16" in length or if either

spring or shunt wire (C) is burned or damaged in any way, replace both brushes. If the brushes are found

serviceable af ter removing, reinst all them in the same position as removed.

Fig. 53

Fig. 54 Fig. 55

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Porter-Cable 3807 User Manual Page 17