Graco Therm-O-Flow 55-H, Instructions-Parts List Manual

Page: 38 / 76

38 310–534
Service
Separating the Pump from the Air Motor
See Fig. 31 on page 53 for more information. To
separate the pump from the air motor:
1. Perform steps 1 – 15 of the Removing/Reinstal-
ling the Pump Assembly procedure, on page 37.
2. Remove the remaining sheet-metal shrouds from
the pump.
3. Remove the coupling nut (40), which attaches the
pump to the air motor. Be careful not to lose the
collar couplings (30).
4. Remove the nuts from the stand-off rods (20). You
can now separate the pump from the air motor.
5. To access the bare pump, remove the pump’s:
D
insulation
D
2 heater bands
D
sensor block
Re-attaching the Air Motor to the Pump
Reverse the above procedure to re-attach the pump to
the air motor.
Be sure that:
D
when you reinsert the collar couplings (30) into the
coupling nut the large flanges point upwards
D
you re-apply RTV sealant to the pump shrouds
before re-assembling them
For more information, see Form# 310–530, or call your
Graco technical support representative.
Removing the Follower from the Pump
See Figs. 33 and 34 on pages 56 and 58 for more
information. To remove the follower from the pump
assembly:
1. Remove the pump assembly by following steps
1 – 14 of the Removing the Pump Assembly
procedure.
2. Remove the sensor from the follower plate.
3. Disconnect the follower-plate wires from the junc-
tion box (Figs. 21 and 22).
4. Loosen the coupling nuts from the follower con-
duits and from the sensor conduit.
5. Remove the air line from the blow-off valve.
6. Slide off the follower.