User's Manual

10 309962
Service
WARNING
SKIN INJECTION HAZARD
To reduce the risk of a serious injury,
including fluid injection,
D Follow the Pressure Relief Procedure on page
7 when you stop dispensing, before servicing
the gun, and whenever you are instructed to
relieve the pressure.
D After adjusting or servicing the gun, make sure
the fluid will not trigger on when the trigger
safety is locked. If fluid does flow, the gun is not
assembled properly or the trigger safety is
damaged. Reassemble the gun or return it to
your nearest Graco distributor. Do not use the
gun until the problem is corrected.
SERVICE NOTES:
WARNING
SKIN INJECTION HAZARD
To reduce the risk of a serious injury,
including fluid injection, if fluid continues
to flow after the trigger is released,
service the gun immediately as instructed below.
Do not use the gun until the problem is corrected.
NOTE: Items in ( ) refer to items in the PARTS list.
1. If the fluid continues to flow after the trigger is
released, the gun valve may need adjustment, be
obstructed or damaged, or the needle
assembly (15) or seat (18) may be worn or dam-
aged.
a. Adjust the spring tension as instructed on
page 13.
b. Replace the needle assembly (15) or
seat (18) as instructed on page 13.
2. Follow the torque, sealant and lubrication notes for
your gun model number.
3. The following repair kit is available:
Repair Kit Gun Model
C32002 Manual Hot–Melt Guns C34005,
C34007, and C50018
Installing new heater unit, RTD sensor, or
switch
1. Open the connector (24) by removing the screw on
the side and pulling out insert (25).
2. For Therm–O–Flow 6 pin assemblies, removal and
replacement of the heaters and RTD require a pin
extraction tool, new connector pins, and a pin
crimping tool. These tools meet spec
MIL–C–22520 (Ref. Daniels AF8 crimp tool) or
equivalent, available at your local industrial electri-
cal supply warehouse. Soldering the new leads is
an acceptable alternative as long as new pins (27)
are used.
3. Remove the faulty sensor or heater by cutting the
leads at the connector and pulling the wires back
through the conduit and out of the gun.
4. Use the pin extraction tool to punch out the old
pins.
5. Coat heater or sensor with heat sink compound.
6. Gently slide new heater or sensor into appropriate
hole.
7. Feed the new wires through the conduit to the
connector. On bottom entry models, be sure to use
protective sleeve (31) over wires where they pass
through needle area.
8. Cut and strip the wires to the appropriate length.
9. Slide 1/8” diameter heat shrink tubing over the
wires.
10. Crimp or solder the wires to the appropriate new
connector pin as shown in Fig. 3.