Air Motor Service

6.Install the toggle pins (Z) in the yoke (O). As- semble the toggle assembly (U) by placing a well greased spring onto the toggle arm (T) and then the toggle rocker (S). Place the toggle arm (T) ends of the toggle assembly (U) onto the toggle pins, and snap the pivot pin (S) ends of the toggle assembly into the lugs (P).

7.Set gap on inlet valve (N) using the .145 in. (3.68 mm) side of gauge 171818. Rotate valve stem (X*) until snug against gauge, then back off until valve stem slot is lined up with wire holes in valve nut (J*) (do not back off more than 1/2 turn). See the Cutaway View Fig. 3.

8.Tighten the bottom valve nuts (K*) securely by hand.

9.Align the holes in the valve nuts (K*) and the slots on the tops of the inlet valve poppets (N*), and drop the lock wires (L*) through the holes in the valve nuts and into the slots in the inlet valve poppets. Pull the lock wires down tightly, and bend the ends about 120_ with needle-pliers so that they cannot be pulled back out of the holes.

13.Grease and install the bearing housing assembly (26 or 27) for all Models except Model 206955, or seal (2*), ring retainer (3) and bearing (4) for Model 206955 into the air motor base (F).

14.Slide the piston rod (A) down through the bearing housing assembly, and lower the piston assembly

(G)into the air motor base (F).

15.Carefully lower the cylinder (E) straight down onto the piston assembly (G). Tighten the six screws

(D)holding the cylinder to the base (F).

CAUTION

To avoid damaging the cylinder wall, lower the cylin- der straight down onto the piston. Never tilt the cylinder as it is being lowered.

16.Grip the trip rod (C) with padded pliers. Remove the 5/16 nut from the top of the trip rod. Screw the cap nut (B) onto the trip rod (C), push the cap nut down, and screw it into the top of the cylinder (E).

CAUTION

Never re-use the old lock wires. They will get brittle and break easily from too much bending.

Do not score the lock wires when you bend them because they will break on the scoring.

10.Grease and install the new o-rings on the piston assembly (G) and in the groove in the air motor base (F).

11.Clamp the air motor base (F) in a vise by closing the vise jaws on the flange.

12.Grease and install the seal (2, 27 or 28) into the air motor base (F). Install bearing (4) and ring retainer

(3) into the base for Model 206955. Grease and install the bearing housing assembly (26 or 27) for all other models.

WARNING

MOVING PARTS HAZARD

Never operate the air motor with the air motor identification plates removed. The piston and associated parts can ampu- tate a hand or finger caught between them.

17.Replace the identification plates (19, 23 or 26) before operating the air motor.

18.Before remounting the the air motor to the pump, connect an air hose and run the air motor slowly, starting with just enough air pressure to make the air motor run, and make sure that it operates smoothly.

19.Reconnect the ground wire before regular opera- tion.

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