Haier 311209J User Manual download pdf (Page 11)

Service

311209J 11

Service

1. If fluid continues to flow after trigger is released:

• gun valve may need adjustment,

• gun valve may be obstructed or damaged,

• or needle assembly (4) or seat (6) may be worn

or damaged.

Replace needle assembly (4) or seat (6) as

instructed on page 12.

2. Use Repair Kit 253553 for Manual Hot-Melt Guns

249512, 249513, 249514, 249515, 297273, and

297274.

Install New Heater Cartridge(s),

RTD Sensor, or Switch

1. Remove covers (9 and 16).

2. Pull terminal block (36) out of handle and discon-

nect lead wires of failed components.

3. Gently slide new heater(s) or sensor into appropri-

ate hole.

4. Feed new wires through conduit to terminal block

(36) and connect after cutting to length and strip-

ping.

5. Use an ohm meter to check:

a. Heater pins 1 to 2, 445 +/- 35 .

b. RTD sensor pin 3 to 4, 108 +/-1 at 70°F

(21°C).

c. Continuity to gun body from pin 8.

d. No continuity from pins 1-7 to gun body or con-

nector shell, or ground pin 8.

After adjusting or servicing gun, ensure that fluid will

not trigger on when trigger lock is engaged. If fluid

does flow, gun is not assembled correctly or trigger

lock is damaged. Reassemble gun or return it to

your nearest Graco distributor. Do not use gun until

the problem is corrected.

ΩΩ

FIG. 12: 8 Pin, 240 Volt Shown

All

Models

{

All models except

249514 and

249515

Viewed from wire end of connector

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 21 22

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Haier 311209J User Manual Page 11

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