Meggitt Fuelling Products
Maintenance Manual (MMF251)
Hydrant Coupler – F251 Series
USE OR DISCLOSURE OF DATA ON THIS PAGE IS SUBJECT TO THE RESTRICTIONS ON THE TITLE PAGE OF THIS DOCUMENT
28 Feb 2014
Revision 4.0
14
3. Install shear pin (6) into latching lug (7). Install pin, groove (5) thru latching lug (7) to shear
pin (6). Repeat for remaining lugs.
Note:
Gold Shear pins shall be used on F251 couplers mated on the F239 pressure control
coupler assembly.
Red shear pins shall be used on F251A couplers mated to the CCMY8500M3
pressure control coupler assembly.
4. Install springs (8) and latching lugs (7) in body (37) as follows:
Note:
Long nose pliers may be used to close the spring loop during installation of a spring
in the body, but be careful to avoid damaging the spring. The wire shall not be
marked or scratched.
b. Push the loop of spring (8) into the hole in body (37), with the two tangs resting on the top
surface. Push the spring in as far as possible, so the two tangs contact the body surface.
The loop of the spring shall be a tight press fit in the hole.
c. Position latching lug (7) in its groove on body (37), spring anchor end inward to contact
the ends of the two tangs of spring (8). Lift and place the ends of the spring tangs into the
groove of the locking lug. Press the locking lug inward and rotate it into position. Make
sure that both of the spring tangs are still in their correct positions and that latching lug (7)
rotates freely. Repeat for each of the springs (8) and locking lugs (7).
Figure 2.
Coupler Section Assembly
