Graco 918334, Instructions-Parts List Manual

Page: 34 / 86

34 310528
Service
Servicing the Pump/Motor Assembly for
the Check-Mate 800
For specific information about servicing the
Check-Mate 800 pump, see either Form# 308570 or
310530. The sections below describe how to:
D remove/re-install the pump from the ram
D separate the pump from the air motor
D re-attach the air motor to the pump
D remove the follower from the pump
Removing/Re-installing the Check-Mate 800 Pump
from the Ram
To remove the pump assembly from the ram, follow
this procedure:
1. If the material drumpail has already been removed
from the supply unit, go to step 2. If you need to
remove the material drumpail, perform the proce-
dure in
Changing Empty Pails
on page 23.
2. Make sure the ram hand valve is in the OFF
position.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
(page 21).
3. Relieve the supply unit pressure .
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve ram pressure, always
follow the
Ram Pressure Relief Procedure
(page 31).
4. Relieve the ram air pressure.
5. Turn off the electrical power to the supply unit. Fol-
low all applicable safety procedures and lockout
rules.
6. Turn OFF the main electrical disconnect.
WARNING
ELECTROCUTION HAZARD
To reduce risk of injury or damage to
equipment, make sure the main discon-
nect is OFF before continuing with this
procedure.
7. Bleed off pressure in the system and excess
material by opening the dispense gun and catching
the material in a waste container.
8. Turn the system CONTROL ON switch to OFF.
9. Disconnect all material hoses.
10. RTV sealant on the pump shroud may make it
difficult to remove individual shroud pieces. Using
a knife or a razor, scrape the sealant off of the
seams of the shrouds.
11. Disconnect the junction box from the pump by:
a. Removing the cover of the junction box.
b. Disconnecting the heater wires and sensor
wires that come from the pump.
c. Removing the wires from the junction box.
d. Disconnecting the pump’s back shroud and
moving it backwards out of the way.
12. Remove the follower from the pump, using the
procedure described in the Removing the Fol-
lower from the Check-Mate 800 Pump section
on page 35.
13. Separate the pump from the air motor, using the
procedure described in the Separating the
Check-Mate 800 Pump from the Air Motor
section on page 35.
14. Remove the pump and service it as needed. See
Form# 308570 and 310530 for more information
about the pump.
15. Reverse this procedure to reinstall the pump. Be
sure to re-apply RTV sealant to the seams of the
shrouds before replacing them on the pump.