Elkhart Brass Hydro-Chem Flex HC-750E-FLX - Manual (Page 7)

7
III. H
YDRO
-C
HEM
®
F
LEX
M
AINTENANCE
The following maintenance procedures should be followed in order to reduce the possibility of
field difficulty or failure.
A. Inspections
Weekly visual inspections and monthly operational checks will promote proper nozzle function.
These inspections may be done daily in busy companies. All nozzles should be flow tested
before entering any hazardous environment to ensure equipment is operating properly.
B. Maintenance After Use
The nozzle should be flushed thoroughly after every use. This can be done by flowing a clean
water source through the nozzle. The internal passageway of the nozzle should also be
visually inspected for possible damage caused by foreign objects carried by the water through
the nozzle. Periodic removal of dry chemical from the adjustable center barrel is
recommended. Follow dry chemical manufacturer recommendations for maintenance and
cleaning of the dry chemical agent portion of the nozzle.
The dry chemical discharge tip and stem portions of the nozzle rotate via a cam and slot
mechanism. If these parts become difficult to turn, remove the detent screws, coil springs and
detent balls and slide apart. Clean all parts and surfaces including the cam slots. Lubricate
the cam slot with Engineered Custom Lubricants #0025 Teflon Grease or equivalent. Use
lubricant sparingly. Excess grease will attract dirt and grit and can cause interference between
close fitting parts. Reassemble and check for proper operation.
The water/foam discharge tip is actuated electronically. If these parts become difficult to
operate, remove the two screws that retain the electric actuator and remove it. Remove the
nozzle tip and the nozzle tip o-ring. Use a mild soap & water solution to clean the outside
surface of the center barrel, the nozzle tip, and the o-ring. Inspect the o-ring and replace if
worn or damaged. Apply a thin coat of lubricant (Dow Corning #7 Lubricant/Sealant) to the o-
ring, the outside surface of the center barrel, and the inside surface of the nozzle tip. Reinstall
the o-ring, nozzle tip, and electric actuator (see exploded drawing for Loctite requirements).
Move the nozzle tip through its entire range of motion several times to distribute the grease.
With the tip in the wide fog position, wipe off any excess grease with a clean rag. Storing the
nozzle in the wide fog position will help protect the greased surfaces from exposure to the
elements and contaminants that may be attracted by the grease.
Important:
If there is a question regarding any necessary repair or damage issue, contact
Elkhart Brass for assistance. Parts drawings are located on our website.
www.elkhartbrass.com
Phone #: (574)295-8330 or 800-346-0250
Email: [email protected]