User's Manual

Repair

32 3A0232R

Repair

Remove Hardened Material from Internal Mix Front Head

Perform this procedure when the internal mix diffuser

assembly is filled with cured material. When this hap-

pens, the diffuser assembly must be drilled out.

1. Perform Pressure Relief Procedure, page 20.

2. Loosen then remove retaining ring (810) and air cap

assembly (808) from head (801).

3. Remove diffuser assembly (803).

4. Use two wrenches on flats of diffuser and cap (806)

to remove cap.

5. Use punch to break the check valve (812) and valve

seat (816) loose from the hardened material. Dis-

card the valve seat and spring (813).

6. Use punch to break hardened material loose from

the diffuser cap (806).

IG. 13

802

801

804

803

805

810

808

816*

806*

813*

812*

* Parts shown are not

available on internal mix,

high flow front heads