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SuperCoat

Servicing

3. Loosen the top fitting (5) that secures the top of the air hose.

DO NOT loosen the bottom fitting.

4. Remove the two screws (6) that secure the Automatic

Lubricator and Air Gauge assemblies to the air motor. Remove

the entire assembly from the air motor.

5. Loosen the four cover screws (7) and remove the cover (8).
6. Loosen the four screws (9) that secure the shield assembly (10)

to the plate (11). Loosen the two screws that secure the two

halves of the shield together and remove the shield.

Disassembling the Air Motor (Fig. 19)

1. Remove locking bolts and nuts (1, 2), trip spring retainers (3),

O-rings (4), trip springs (5), and balls (6) from both sides of the

cylinder head (7).

  2.  Disconnect air line (8) from adaptors top and bottom.
  3.  Remove the bolts (10).
  4.  With piston (12) in down position, place wrench on flats

of piston rod (13) and disconnect piston rod from pump

connecting rod (14) by unthreading the coupling nut (36). The

connecting rod (14) can remain secured to the fluid section

displacement rod (37).

5. Remove the lower stanchion nuts (38) and carefully separate

the fluid pump from the air motor assembly.

6. With piston (12) at top of stroke, raise cylinder head (7) and

remove retainer (15). Lift off cylinder head (7).

7. Remove stop nut (17) and then unthread upper valve keeper

(18).

8. Remove air valve (19) followed by lower valve keeper (20) and

bushing (21).

9. If valve sleeve (16) is still in cylinder head, leave it there unless

it is necessary to change O-rings (22). Use a slide hammer or

bent extraction tool to carefully remove the sleeve (16).

10. Remove cylinder (23).
11. Secure piston rod (13) in vise and remove piston nut (25) and

piston washer (26).

12. Remove piston rod (13) and piston (12) from motor base (24).

Be careful not to damage the piston O-ring (29).

Attention

Do not clamp on O.D. of the piston rod.

  13.  Remove valve rod assembly (27) and valve trip collar (28).
  14.  Unscrew piston rod (13) from piston (12).
  15.  Remove O-ring (29) from piston (12).
  16.  Remove O-rings (30, 31) from bushing (21), O-ring (32) and

wear ring (33) from motor base (24).

Reassembly Procedure (Fig. 19)

Wash all replaceable parts thoroughly with kerosene and lubricate

with Lubri-Plate or similar non-water soluble grease. For routine

servicing, use new parts from the Air Motor Service Major (see next

column for part numbers). Inspect all other parts for abnormal wear

or damage and replace if necessary.
1. Install new O-ring (32) and new wear ring (33) into motor

base (24) and new O-rings (30, 31) into bushing (21). Use care

to avoid damaging O-rings and make sure they are properly

seated in the O-ring grooves.

2. Place valve trip collar (28) into piston rod (13) followed by

valve rod assembly (27).

3. Screw piston rod (13) into piston (12). Replace piston nut and

washer (25, 26).

  4.  Install new piston O-ring (29) into piston (12).
  5.  Place new gasket (34) into position in motor base (24).
  6.  Place piston assembly (12, 13) into motor base (24).  Do not

damage O-ring.

7. Place new O-rings (35) on air valve (19).

8. Mount air valve assembly (19, 35) onto valve rod (27) by

placing bushing (21) over valve rod (27), followed by keeper

(20), air valve (19) and upper valve keeper (18). Thread upper

valve keeper (18) down on air valve hand tight. Then loosen

approximately 1/4 turn. Place wrench on flats of valve rod (27)

and hold to prevent valve rod (27) from turning. Thread stop

nut (17) down on valve rod (27) to lock upper valve keeper (18)

in position. Be sure upper valve keeper (18) does not change

position.

9. Grease inside of cylinder (23) and work cylinder down over

piston gently in order to avoid damage to piston O-ring (29).

10. Install new O-rings (22) on valve sleeve (16). Grease valve

sleeve and install into cylinder head (7) so large holes in sleeve

line up with trip retainer holes in cylinder head (7). Put one

trip retainer (3) with new O-ring (4) into cylinder head without

ball (6) or spring (5) and hold in position temporarily with

locking bolt (1) and nut (2).

11. Place new gasket (34) into position in cylinder head (7) and

hold with gasket cement or grease.

12. Carefully position air valve assembly (19) up into cylinder head (7).
13. Push bushing (21) up into bottom of cylinder head (7) to

sufficiently permit installation of retainer (15).

14. To install trip spring retainer be sure one of the detents of

valve (19) is properly lined up with hole in the cylinder head

(7). Place new trip spring retainer O-ring (4) onto remaining

trip spring retainer (3). Install new ball (6) followed by trip

spring (5) and trip spring retainer (3) into hole of cylinder head

(7). Lock into position with bolt (1) and nut (2).

  15.  For opposite trip spring retainer (3) replacement, repeat step #14.
  16.  Connect air line (8) to adapters top and bottom.
  17.  Replace bolts (10).  Always tighten bolts 180 degrees apart in

order to obtain proper and even compression.

18. Place wrench on the flats of piston rod (13) and connect pump

connecting rod (14) by tightening the coupling nut (36).

19. Slide the fluid pump assembly back onto the stanchions (39)

and secure with the stanchion nuts (38).

Final Reassembly (Fig. 18)

1. Line up the holes in the Automatic Lubricator / Air Gauge

assembly with the holes in the air motor housing. Secure to

the housing with the two screws (6).

2. Insert the air hose back into the top fitting (5). Tighten the

fitting with a wrench.

3. Position the shrouds over the air motor. Begin with the shroud