Moen 1255 User manual

1255 Cartridge and O-rings
Removal and Installation
Tools needed
Replacing only
the spout O-rings:
Move to step 9.
Replacing the
1255 cartridge:
Move to step 4.
Grab the dome and pull
upward to remove.
OR
Locate the hole in either the front or back of the handle. If this hole is
covered by a small plug, pry the plug off to remove. Next, use the 3/32”
Allen wrench in the hole to unscrew the Allen screw. This screw does not
need to be fully removed, only loosened until the handle will slide off.
Caution: Always
turn your water
supplies off
before
disassembling
your faucet.
With the
supplies turned
off, move your
fau cet ’ s h andl e
to the “on”
position to
relieve pressure.

2
Highlighted in
orange are
small tabs on
the cartridge
and grooves in
the faucet.
These must
line up.
Installation Tool Option
Tool number: 118305
4
Using the grey assembly tool (supplied with the faucet), pliers or wrench,
unscrew the 1255 cartridge nut counter-clockwise and remove.
Lift the 1255 cartridge out
of the faucet.
1. View the 1255 cartridge to find the three small tabs protruding.
Look into the chamber of the faucet to find the location of the
three large grooves. The grooves will accept the small tabs
protruding from the 1255 cartridge. These tabs and grooves are
highlighted in orange above for demonstration, but will not be
orange on your cartridge and faucet.
Insert the 1255 cartridge
into the chamber making
sure to line up the three
tabs with the grooves.
Use a soft brush to
clean the inside of
the chamber. Make
sure no debris
remains.
Using the grey assembly tool,
pliers or a wrench, tighten the
new 1255 cartridge nut until
snug. Next turn approximately
90 degrees to fully secure the
nut.
OR
7
8

3
To reassemble the
handle: Work
backwards from
steps 3 through 1.
To install spout
O-rings:
Move to step 9.
Gently pry up on the black crown ring. Be careful not
to damage the crown ring; this will be used again
during reassembly.
9
10
Grab the spout and lift up
to remove the item from
the faucet body.
11
In the photo above, the
upper and lower O-rings
are highlighted in orange.
Pry each O-ring out to remove. Be careful not to damage the valve body.
Using the supplied pouch of grease, apply a thin layer of grease
to each rubber O-ring. Place a new rubber O-ring onto the black
valve body and push down until fully seated in the lowest groove.
Place the next O-ring onto the top groove in the valve body.
12
13

4
Use a soft brush to
clean the inside of
the spout. Insure
the inner surface is
clean and smooth.
Slide the spout
back on until it is
flush with the base.
Secure the crown ring
into the top of the spout
so the tabs of the tuck
under the edge of the
channel. The line
highlighted in orange
shows where the gap in
the crown ring should
be located.
To insure the crown
ring is seated
properly, gently pull
upwards on the spout.
If the crown ring is
seated, the spout will
not lift off.
To reassemble the
handle: Work
backwards from
steps 3 through 1.
Once the handle is assembled, you are all done!