6 Maintenance
Read the instructions carefully.
The items refer to the parts list and service kits section.
Nozzle housing
Step 1
1. Unscrew the nozzles (16) with pliers and inspect for debris caught on the stream straightener (16.3) or in the nozzle orifice.
The inside diameter of (16.1) must be smooth, round, and free of damage (especially any nicks) for maximum jet impact.
Replace worn or oversized nozzles if the original flow rate and pressure are required.
2. Verify the (16.3) is tight in the bore of the (16.1).
3. Inspect the nozzle housing bevel gear (18) for wear such as sharp/pointed or worn teeth. If it needs to be replaced, remove
the bevel gear retaining ring (19) with a small slotted screwdriver and pry (18) from the nozzle housing (9).
4. Clean any deposits from (9.3) and examine for excessive wear. Light scoring is acceptable, but the (9.3) should be replaced if
they are grooved in the seal contact area. A good maintenance program will require replacing many (9.3), therefore, it may
be worthwhile to make or obtain press tools for pressing (9.3) out of (9). The press tools are available from Alfa Laval GJ
cleaning systems. Before installing new (9.3), clean the housing bores and remove any burrs resulting from (9.3) removal.
Press them in so that their flanges are flush against (9).
5. Inspect the nozzle housing bearings (24 and 25) and seals (27).
6. Clean any deposits from the exterior of (24 and 25) and check their fit in the (9.3). While they should turn freely, (24 and 25)
should be replaced if the thickness of the flange is 0.086”, or less, to avoid shortening the life of the bevel gears.
7. Inspect the interior of (27) for loss of spring tension (indicated by excessive dry deposits of dirty or abrasive cleaning solution
on the spring), replace as required.
16.3
25
27
16.1
19
9
18
9.3
16.1
9.3
27
16.3
24
10.1
4125-0026
16.2
16.2
30
Summary of Contents for GJ PF
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