Graco L20c Parts list manual

312374H
EN
Instructions-Parts
Air Controls
Integrated and 2-Button Interlock Air Controls for use with Supply Systems.
For professional use only.
See page 2 for Model information.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Integrated Air Controls
ti10438a
r_257302_312376_2e
L20c Air Controls

Contents
2312374H
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Integrated Air Controls . . . . . . . . . . . . . . . . . . . . . . 3
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 3
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Replace Director Valve . . . . . . . . . . . . . . . . . . . . 4
Replace Air Motor Regulator . . . . . . . . . . . . . . . . 4
Replace Ram Air Regulator . . . . . . . . . . . . . . . . 5
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2-Button Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Attach Roller Switch and Actuator . . . . . . . . . . . 6
Attach 2-Button Interlock Assembly . . . . . . . . . . 7
L20c Air Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 9
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Replace Air Motor Regulator . . . . . . . . . . . . . . . . 9
Replace Air Motor Shutoff Valve and Ram Shutoff
Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Remove Blowoff Push Button . . . . . . . . . . . . . . . 9
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
L20c Air Controls, 257613 . . . . . . . . . . . . . . . . . 10
Integrated Air Controls . . . . . . . . . . . . . . . . . . . . 11
Integrated Air Controls . . . . . . . . . . . . . . . . . . . . 12
2-Button Interlock Kit . . . . . . . . . . . . . . . . . . . . . 13
Pneumatic Schematic . . . . . . . . . . . . . . . . . . . . . . 14
Integrated Air Control Module . . . . . . . . . . . . . . 14
Integrated Air Control Module with Optional
2-Button Interlock . . . . . . . . . . . . . . . . . . . . 15
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 16
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . 16
Models
Air Controls
2-Button Interlock
Model
No. Description
Maximum
Regulated
Working
Pressure
psi (MPa, bar) Air Inlet Size
Compatible
2-Button Interlock
Model
255650
Integrated Air Controls for D60, D200, and
D200s
150 (0.69, 6.9) 3/4 npt(f) 255719
255720
24C824
Integrated Air Controls for D200 and D200s
(Ram only, no pump control)
150 (0.69, 6.9) 3/4 npt(f) 255719
255720
257612
Air Controls, For S20 3 in., 5 Gallon (20 Liter)
Supply Systems
150 (0.69, 6.9) 1/2 npt(f) NA
257613
Air Controls, For L20c 3 in., 5 Gallon (20
Liter) Supply Systems
100 (0.7, 7) 1/2 npsm(f) 255615
Model
No. Description
257615 Two-Button Interlock, For D60 3 in., 16 Gallon (60 Liter) Supply Systems
255719 Two-Button Interlock, For D200 3 in., 55 Gallon (200 Liter) Supply Systems
255720 Two-Button Interlock, For D200s 6.5 in., 55 Gallon (200 Liter) Supply Systems

Integrated Air Controls
312374H 3
Integrated Air Controls
Pressure Relief Procedure
1. Close the air motor slider valve (E) and the main air
slider valve (F).
2. Set the ram director valve to DOWN. The ram will
slowly drop.
3. Jog the director valve up and down to bleed air from
ram cylinders.
Disassembly
1. For Supply Systems with Shrouds: Remove
shrouds. Loosen six captive screws (A) and disas-
semble shrouds (B) from supply system.
2. Disconnect all hoses and tubing from existing air
control.
3. Remove four screws (C) from the mounting bracket
(D) and remove the integrated air controls from the
supply system.
To reduce the risk of serious injury whenever you are
instructed to relieve the pressure, follow the Pressure
Relief Procedure.
F
IG . 1
A
B
B
r_289105_312375_a
255650 (shown)
F
IG . 2
F
IG . 3
If you are not replacing the manifold (1), you may
prefer to remove the bracket from the ram and
leave it attached to the integrated air controls
because the screws are easier to reach. See F
IG . 4.
C
1
E
F
r_289105_312375_2a
D
255650 (shown)
r_289105_312375_3a
C
D
E
F
1
255650 (shown)

Integrated Air Controls
4312374H
Replace Director Valve
Numbers in parentheses refer to F IG . 5.
1. Relieve pressure.
2. Remove screws (4a) and take off director valve.
3. Remove spring (4c), valve plate (4d), and o-ring
(4b)
.
4. Remove and discard pin (4g) and four valve seats
(4e) with o-rings (4f).
5. Insert new valve seats (4e) with o-rings (4f) and new
pin.
6. Insert new director valve plate (4d, see Note above)
spring (4c), and o-ring (4b).
7. Attach new director valve with screws (4a). Tighten
screws until snug.
Replace Air Motor Regulator
Numbers in parentheses refer to Parts, page 11. Air
motor regulator not included with 24C824 integrated air
controls.
1. Relieve pressure.
2. Disconnect air motor hosing and fittings.
3. Remove two screws (9) and take off the shutoff
valve (3) at top of module. If your supply system has
an air solenoid, it can remain attached to the shutoff
valve.
4. Remove two screws (9) and take off the air motor
regulator (6).
5. Attach new regulator to manifold. Orient so the
gauge lines up with the gauge on the ram air regula-
tor and the direction of flow arrow points up. Tighten
screws until snug. Recommend using thread locker
Loctite 220 or equivalent.
6. Reattach shutoff valve (3) at top of regulator. Make
sure that o-ring (5) is in place on valve (3).
F
IG . 4
Note the orientation of the director valve plate when
you remove it. The opening should be on the oppo-
site side (left) of the lever.
r_289105_312375_4a
F IG . 5
4
4a
4b 4c
4d
4e
4f
4g
ti10952a

Integrated Air Controls
312374H 5
Replace Ram Air Regulator
Numbers in parentheses refer to Parts, page 10.
1. Relieve pressure.
2. Remove four screws (7a) and take off the ram air
regulator (7).
3. Replace o-rings (7b) on back side of regulator.
4. Attach new air regulator to manifold. Use index pin
for correct orientation. Tighten screws until snug.
Reassembly
1. Using four screws, attach the integrated air controls
to the mounting bracket. See F
IG . 2.
2. Attach the ram up, ram down, and blowoff air lines
as shown in Figure F
IG . 6.
3. Attach all other hoses and replace shrouds.
F
IG . 6
Ram down
Ram up
Blowoff
ti10778a
Auxiliary
air supply port
255650 (shown)
}
Not included
with 24C824

2-Button Interlock
6312374H
2-Button Interlock
Attach Roller Switch and
Actuator
1. Attach roller switch (133) to bracket (132). Position
roller switch to far back position on the bracket and
leave mounting screws (144) loose.
2. Attach bracket (132) to ram with screws (105) and
washers (106). Leave screws loose. See F
IG . 7 and
F
IG . 8.
3. Raise platen to top of drum.
4. Attach actuator bracket.
a.
For D200 and D200s supply systems : Attach
actuator bracket (138) near bottom of lift rod so
it engages the roller switch when the platen
reaches the top of the drum.
b. For D60 supply systems: Loosen one screw
(151a) and remove one screw (152b). Align
actuator rod (151) on piston rod so it touches
the air motor mounting bracket. Tighten actua-
tor rod to piston rod with four screws (140).
To reduce the risk of serious injury whenever you are
instructed to relieve the pressure, follow the Pressure
Relief Procedure, page 3.
F
IG . 7: D200 and D200s Bracket
F
IG . 8: D60 Bracket
ti10844a
133
132
144
105
106
144
132
105
133
106
r_289105_312375_5a
150
F
IG . 9
F
IG . 10
ti10848a ti10847a
138
139
140
151b
139152 153
140
138
r_289105_312375_5a
151a
151

2-Button Interlock
312374H 7
5. Tighten actuator bracket to rod using 4 screws (140)
and bracket clamps (139).
6. Adjust the roller switch (133) out so it contacts actu-
ator bracket (138), then tighten screws (144).
7. Tighten bracket (132) to ram with screws (105) and
washers (106).
8. Connect main air (S1) to port (S1) on roller switch
(133) with 15 in. of tubing (146).
9. Connect switch signal air (S2) to port (S2) on roller
switch (133) with 15 in. of tubing (146).
10.
For D60 supply systems : Install two fittings (150)
into (S1) and (S2).
Attach 2-Button Interlock
Assembly
See F IG . 12.
1. Relieve pressure.
2. Remove shrouds. See F
IG . 1.
3. Disconnect air lines.
4. Remove integrated air controls from bracket. See
Disassembly, page 3.
5. Remove back cover from 2-button interlock assem-
bly (130).
6. Position 2-button interlock assembly between air
control bracket and air controls. The screws that
attach the integrated air controls to the supply sys-
tem also attach the 2-button interlock assembly.
7. Reattach integrated air controls. See Reassembly,
page 5.
8. Insert cap screw (145) through integrated air con-
trols into 2-button interlock module. See F
IG . 12.
F
IG . 11:
S1
S2
133
ti10844a2
F IG . 12
130
145
ti10843a

2-Button Interlock
8312374H
See F IG . 13 for steps 9 - 14.
9. Inside 2-button interlock module, disconnect elbow
fitting (6) and push fittings (7) from tee fitting (5).
Remove plug (8) from auxiliary air supply port on
back of integrated air controls. Install tee fitting (5)
through into the port and through the opening in the
bracket. Reconnect elbow fitting (6) and push fit-
tings (7). Reinstall plug (8) at top of tee fitting (5).
10. Connect tubing (147) from ram down fitting on back
of air controls to fitting (D1) on right side of bottom
pilot valve. See F
IG . 13.
11. Connect tubing from ram down fitting near top of
ram cylinder to fitting (D2) on left side of bottom pilot
valve. See F
IG . 13.
12. Connect tubing (147) from ram up fitting on back of
air controls to fitting (U1) on right side of top pilot
valve. See F
IG . 13
13. Connect tubing from ram up fitting near bottom of
ram cylinder to fitting (U2) on left side of top sole-
noid.
14. Connect blowoff air (B1) to blowoff air connector on
platen.
15. Replace cover on 2-button interlock assembly.
16. Attach all other hoses and replace shrouds.
It may be necessary to rearrange tubing so cover
will fit back on assembly.
F
IG . 13
5
6
7
8
U1
U2
S1
D1
D2
S2 D1
(ram down) U1
(ram up)
B1
(blowoff)

L20c Air Controls
312374H 9
L20c Air Controls
Pressure Relief Procedure
1. Close the air motor shutoff valve (E) and remove air
line from air control coupling (x).
2. Set the elevator director valve to DOWN. The ram
will slowly drop.
Disassembly
1. Remove two screws that attach air control panel to
elevator.
2. Disconnect all hoses and tubing from existing air
control.
Replace Air Motor Regulator
1. Loosen swivel fitting (205) between regulator (206)
and air motor shutoff valve (203).
2. Remove nut (218) from front of regulator and pull
regulator out of panel (201).
Replace Air Motor Shutoff Valve
and Ram Shutoff Valve
See parts illustration on page 10.
1. Remove two screws (211) from air motor shutoff
valve and two screws (209) from ram shutoff valve.
2. Remove valve assemblies from panel.
Remove Blowoff Push Button
See parts illustration on page 10.
1. Hold button in place and remove screw.
2. Remove nut underneath button and push button
from panel (201).
Reassembly
1. Replace parts as needed and reassemble them in
the reverse order of disassembly.
2. Connect all hoses and tubing.
3. Install air controls on elevator with two screws and
lockwashers from kit 257613. See manual 313527.
To reduce the risk of serious injury whenever you are
instructed to relieve the pressure, follow the Pressure
Relief Procedure.
F
IG . 14
218
206
201
203
205
r_289105_312375_8a

Parts
10 312374H
Parts
L20c Air Controls, 257613
Mounting screws and lockwashers are included with
kit 257613. See manual 313527.
Front View
Back View
r_289105_312375_9a
r_289105_312375_9a2
212
218
211
209
213 216
201
205
204
206, 218
203 210
214
202
215
219
217
207
208
Ref. Part Description Qty.
201 PANEL 1
202 517313 VALVE, 3 way 1
203 114362 VALVE, ball, air 2
204 FITTING, adapter 1
205 FITTING, 90° swivel 1
206 110318 REGULATOR 1
207 FITTING, tee 1
208 FITTING, line, air 1
209 SCREW, cap; 10-24 x 0.375 in. 2
210 FITTING, elbow 1
211 SCREW, cap; 10-24 x 0.625 in. 2
212 15T500 GAUGE 1
213 FITTING, 90° swivel 1
214 FITTING, elbow 2
215 FITTING, elbow 3
216 FITTING, elbow 1
217 FITTING, swivel 1
218 NUT, regulator 1
219 SAFETY, valve 1