Graco Therm-O-Flow 20, Instructions - Parts Manual

Page: 23 / 66

Service
309858K 23
Check-Mate 800 Pump/Motor
Service
Removing Pump from Ram
1. Follow Before Servicing procedure, page 21.
2. Make sure the ram control lever is set to OFF.
3. Turn off the electrical power to the supply unit. Fol-
low all applicable safety procedures and lockout
rules.
4. Turn OFF the main electrical disconnect.
5. Bleed off pressure in the system and excess mate-
rial by opening the dispense gun and catching the
material in a waste container.
6. Turn the system CONTROL switch (65) to OFF. F
IG
.
5, page 17.
7. Disconnect all material hoses.
8. RTV sealant on the pump shroud may make it diffi-
cult to remove individual shroud pieces. Use a knife
or a razor, to carefully scrape the sealant off the
shroud seams.
9. Pumps C03509 and C03512 only: disconnect the
junction box from the pump.
a. Remove the junction box cover.
b. Disconnect the heater wires and sensor wires
that come from the pump.
c. Remove the wires from the junction box.
d. Disconnect the pump's back shroud and move it
backwards out of the way.
10. Remove the follower from the pump, follow Remov-
ing Follower Plate procedure, page 24.
11. Separate the pump from the air motor, follow
Removing Pump from Air Motor procedure, page
24.
12. Remove the pump and service it as needed. Refer
to m
13. Reverse this procedure to reinstall the pump. Be
sure to reapply RTV sealant to the seams of the
shrouds before replacing them on the pump. for
For specific information about servicing the
Check-Mate 800 pump, see manual 308570 or
310530.