Graco 25D117, Операция

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Repair
3A5354B 31
Displacement Lower
Remove Displacement Lower
Refer to your Check-Mate Displacement Pump manual
to repair the displacement lower.
If the air motor does not require servicing, leave it
attached to its mounting. If the air motor does need to
be removed, see
Remove Air Motor , page 30.
1. Perform the Pressure Relief Procedure on page
20 and follow the Pressure Relief Procedure in your
pump manual.
2. Disconnect the blow off tube from the blow off valve.
3. Disconnect the cable connector (DH) from the
platen receptacle (DG) and lower shroud recepta-
cle.
4. To remove shrouds and lower heater components,
follow steps 1-4 on page 25.
5. Remove the screws and lock washers on the lower
mounting rods. See F
IG
. 30.
6. Remove the quick coupler.
7. Open the main air ball valve (BA), then jog the direc-
tion valve UP to separate the lower and the air
motor. Lift the air motor to the highest position, and
move the lower with the platen down from the ram
base.
8. Loosen the set screw (Z).
9. Use two people to carefully lift out the displacement
lower. Service the displacement lower as needed.
See the Check-Mate Displacement Pump manual
for instructions.
Install Displacement Lower
1. Use two people to carefully insert the replaced lower
into the platen, then tighten the set screw (Z).
2. Connect the air inlet to the main air ball valve, then
slightly lift the air cylinders with the air motor.
3. Move the lower with the platen onto the ram base
and align it with the lower mounting rods.
4. Jog the direction valve DOWN to slowly drop the
lower mounting rods into the lower.
5. Install the lock washers and screws and tighten the
screws until they are flat against the lock washers.
6. Jog the direction valve UP to lift the platen slightly.
Loosen the platen set screw to rotate it for adjust-
ment.
7. Reinstall the pump heater components, sensor
components and O/T device.
8. Reinstall the pump heater shrouds (see page 34).
Secure with screws.
9. See Reconnect Displacement Pump in the
Check-Mate Pump Packages manual.
10. Reconnect the air hose and ground wire (DA) to the
air motor.
This procedure must be done while the system is still
warm. The material and equipment may still be hot.
To prevent injury from burns, use proper personal
protection equipment.
F
IG
. 30
Screws
PH
Lower
Screw/
Mounting
Rod
Lock
Washer
F
IG
. 31
H
Valve
DH
DG