Amcot ST Series - Page 21

AMCOT ST SERIES FIBERGLASS COOLING TOWER
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GENERAL MAINTENANCE
WATER DISTRIBUTION SYSTEM – SPRINKLER HEAD ASSEMBLIES
Sprinkler Head Assembly Details
If your sprinkler head fails to rotate smoothly this can often be a sign of damage to the internal
seal/bearing or a result of hard water scale buildup occurring between the lower and upper sections of
the sprinkler head assembly itself. In some cases it may be possible to disassemble the two sections
from one another, clean them with a wire brush to remove scale and reassemble. In other cases
unfortunately it just may be necessary to replace the sprinkler head assembly completely.
To disassemble and clean the sprinkler head assembly:
ST-H-5 to ST-60 (See Figure 1)
 Remove set screw cap on top of sprinkler head.
 Loosen nut and washer, then remove sprinkler head.
 Clean sprinkler head with fresh water and a brush. Check parts to see if they are worn or bad.
 If everything appears to be ok, reinstall sprinkler head. If problem persists it may be necessary
to replace with a new head.
ST-70 - 1500 (See Figure 2)
 Remove the cap and take circlip off.
 Pull the rotary part (head) off of the fixed part (body).
 Clean in same manner as above and reinstall.
 It may be necessary to replace bearings or entire sprinkler head depending on extent of
damages.