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HBEXP_web-411
Dixon Valve & Coupling, Call 800.355.1991
HB Coupling Expander Instructions
OPERATION (continued):
5. To assemble 570-H & 580-H series (curb pump):
Push hose over the punch and into the coupling until hose bottoms out. (The easiest way
to ensure proper insertion depth is to measure and mark the coupling shank depth on the
hose).
6. Turn handles clockwise until resistance to turning ceases - indicating expansion is complete.
7. After expansion has been completed, remove Thrust Connector No. 3 from expander.
Unscrew Thrust Connector and reducer as a unit from coupling. Replace Thrust Connector
in machine, then remove Punch. Machine is now ready for next expansion.
To expand couplings sizes 1¼" through 2":
1. Drive Screw No. 5 must be reversed. Remove Drive Screw from Nut No. 2, reverse Drive
Screw and reassemble with Nut No. 2.
2. Select proper size reducer or reducer nipple. Screw coupling onto reducer (or reducer nipple).
3. Advance Drive Screw No. 5 through coupling until keyed extension of Drive Screw projects
beyond coupling.
4. Slide expanding punch onto keyed extension of Drive Screw. Screw on Lock Nut No. 7.
Turn handles clockwise until punch enters coupling under slight pressure.
5. To assemble 520-H series (fuel oil):
a) Place proper size ferrule on the hose so that the end of the hose is ush with the turned
over portion of the ferrule (end of hose must be cut square). Keeping the ferrule stationary
to the hose, slide the assembly over the punch and onto the shank of the coupling until top
of ferrule is 1/8" from coupling face. Holding the hose in place, slide the ferrule ush against
the coupling face. This allows the turned over portion of the ferrule to be anchored properly
during the expansion process.
b) Turn handles clockwise until resistance to turning ceases - indicating expansion is complete.
6. After expansion has been completed, remove Thrust Connector from machine. Unscrew
Thrust Connector No. 3 and reducer as a unit from coupling. Replace Thrust Connector
in machine. Remove Punch, machine is now ready for next expansion.
CAUTION !!
After starting the expansion of a coupling, the handles must never be turned counter clockwise. The Thrust
Bearing is a single direction action and reverse operation of the machine will
damage the Drive Screw.
(5 pages)
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