Graco 25E079, Операция

Страница: 32 / 52

Repair
32 3A5379B
Remove Displacement Pump
Refer to your appropriate pump manual to repair the dis
-
placement pump.
1. Flush the pump; see your pump manual for flushing
directions. Stop the pump at the bottom of its stroke.
2. Perform the Pressure Relief Procedure on page
14.
3. Disconnect power from the driver.
4. Disconnect the fluid hose. Hold the fluid outlet fitting
with a wrench to keep it from being loosened while
you disconnect the fluid hose.
5. Remove the platen from the displacement pump.
6. If the driver does not require servicing, leave it
attached to its mounting.
7. Remove the clip (DA), and slide the coupling cover
(DB) up to remove the coupling (DC).
8. Use a wrench to hold the tie rod flats to keep the
rods from turning. Unscrew the nuts from the tie
rods (DD) and carefully remove the displacement
pump.
9. Raise the ram assembly to lift the driver away from
the displacement pump.
10. Remove the displacement pump and service as
needed.
11. Refer to the appropriate pump manual to service the
displacement pump.
Keep hands and fingers away from the priming piston
during operation and whenever the pump is pressur
-
ized to reduce the risk of injury. On the pump down
-
stroke the priming piston extends beyond the intake
housing to pull the material into the pump. The prim
-
ing piston works under extreme force. During opera
-
tion and whenever the pump is pressurized, the
priming piston can severely injure or amputate a hand
or finger, or break a tool, caught between it and the
intake housing. Always relieve the pressure before
checking, clearing, cleaning, flushing, or servicing any
part of the pump.
F
IG
. 40:
Fluid Hose
F
IG
. 41:
F
IG
. 42:
Be sure to use at least two people when lifting, mov
-
ing, or disconnecting the pump. This pump is too
heavy for one person. If you are disconnecting the
displacement pump from a motor that is still mounted
(for example, on a ram), be sure to support the dis
-
placement pump while it is being disconnected, to
prevent it from falling and causing injury or property
damage. Do this by securely bracing the displace
-
ment pump, or by having at least two people hold it
while another disconnects it.
ti10508a
DA
DB
DB
DA
DC
DC
DB
DA
ti10510a
DD