Dixon Valve HB Coupling Expander - Manual (Page 2)

2 HBEXP_web-411 Dixon Valve & Coupling, Call 800.355.1991
HB Coupling Expander Instructions
DESCRIPTION:
The HB Expander is a hand operated pull through type expander. It is used in a fixed location
for small production runs or as a portable repair type expander.
The HB Expander will attach all sizes of Dixon Holedall Petroleum 570-H and 580-H series
(curb pump) couplings and sizes ¾" through 2" of 520-H series (fuel oil) couplings.
INSTALLATION:
The HB Expander is shipped assembled except for attaching the handles and threading the
drive screw through the drive screw nut. It can be held in a bench vice or secured to a bench.
Using either method, the expander should be positioned so that the handles overhang sufficiently to give
freedom of movement when turning.
MAINTENANCE:
1. The Drive Screw No. 5 must be kept well lubricated with graphite grease.
2. Oil periodically where indicated on Body No. 1.
OPERATION:
To expand couplings sizes through 1":
1. Select the proper size reducer (if male coupling), reducer and close nipple (if female coupling).
Screw reducer onto Thrust Connector No. 3 by hand, then screw male coupling into reducer
by hand, or if a female coupling, screw onto close nipple until it stops on the washer seat.
2. Position Drive Screw No. 5 (use ½" wrench on flats to turn drive screw) so that the end with
the tapped hole is approximately flush with the front end (threaded end) of the coupling.
3. Select the proper size punch and screw it into Drive Screw No. 5 using a ½" wrench to tighten.
Hold Drive Screw No. 5 from turning and turn the handles clockwise until punch enters coupling
under slight pressure. (Lubricating punch is not necessary - Dixon Holedall Petroleum fittings
are pre-lubricated).
4. To assemble 520-H series (fuel oil):
Place proper size ferrule on the hose so that the end of the hose is flush 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 flush against
the coupling face. This allows the turned over portion of the ferrule to be anchored properly
during the expansion process.