Service
311209W
11
Service
Adjusting Dispensing Gun
1. Follow
, page 8, before
checking or repairing the gun.
2. Check all possible problems and causes before
disassembling the gun.
3. Disconnect the electrical cable.
Pull terminal blocks (36) and insulation displacem
If fluid continues to flow after the trigger is released:
• the gun valve may need adjustment,
• the gun valve may be obstructed or damaged,
• needle assembly (4) or seat (6) may be worn or
damaged.
Replace needle assembly (4) or seat (6). See
on page 13.
Use Repair Kit 253553 for Manual Hot-Melt Guns
249512, 249513, 249514, 249515, 297273, and
297274.
Install New Heater Cartridge,
RTD Sensor, or Switch
1. Follow
disconnect the electrical cable and hoses.
2. Remove covers (9 and 16).
3. Pull terminal blocks (36) and insulation
displacement connectors (IDC) (38) out of the
handle. Loosen the screw in the terminal block or
cut off the IDC to disconnect lead wires of failed
components.
4.
Gently slide new heater(s) or sensor into the
appropriate hole.
5. Feed new wires through the conduit to the correct
terminal block or IDC. If using a terminal block, cut
wires to length and strip insulation before
connecting.
If using an IDC, insert one new RTD wire and one
yellow wire through the IDC holes until the ends can
be seen in the window on the opposite side. Use
pliers to press down insert, then close the IDC
cover.
When replacing switch (51) ensure tube (53)
protrudes from the back of the handle with its end
near the center of the switch body. Gently push
wires through the tube into the gun handle.
6. Replace covers (9 and 16).
Some solutions require disassembling the gun. To
help prevent serious injury, relieve pressure and
disconnect the electrical cable before checking or
servicing the equipment.
To help prevent serious injury from burns, do not
touch hot fluid dispensing from the gun.
51
53
