3M 7800 Instructions d'installation
7800 - Disassembly
© 3M June 2006. All rights reserved.
3M™ Full Facepiece 7800
Disassembly
Let’s begin with the facepiece.
1) To prepare the full facepiece for use with the GVP:
a. Remove the 701 Cartridge Inlets from either side of the facepiece.
b. Install a 7890 Plug into each inlet. The plugs should be replaced
when they are dirty or damaged.
c. Remove the 7890 Plug from the front DIN port.
2) To prepare the full facepiece for use with the Dual Airline:
a. Remove the 7890 Plugs, if it is not already fitted with a 701
Adapter. The 701 adapter allows you to attach the dual airline
breathing tube to the 7800 full facepiece.
b. Thread the assembled 701 adapters with the orange gaskets facing
outward into the cartridge connector port – do not tighten.
c. Install a 7890 Plug into the front DIN port.
3) The 7993 is the Welding Shroud, the 7915 is the Tyvek® Shroud.
The shrouds should be replaced when they are damaged, frayed or torn.
To remove the shroud:
a. Pull it up and over the facepiece, pulling the material from around
the DIN port and side ports when needed.
Tyvek is a registered trademark of E.I. DuPont Company.
4) The 7894 is the Standard Eyeglass Frame. Replace the frame when it
is damaged. To remove the it:
a. Lift the frame kit out of the inside of the facepiece.
b. An alternative frame is the 7925 Universal Frame Kit. It should be
replaced when it is damaged.
7800 - Disassembly
© 3M June 2006. All rights reserved.
5) The 7890 is the Facepiece Plug. Replace the plugs when they are
damaged. To remove them:
a. If the facepiece is set up for the GVP-1 Powered Air Purifying
Respirator (PAPR), unscrew the plugs from either side of the
facepiece.
b. If the facepiece is set up for the Dual Airline Supplied Air System
remove the plug from the center port.
6) The 701 is the Bayonet Cartridge Adapter. Replace the adapter
whenever it becomes damaged or the lugs become worn. If the
facepiece is set up for use with the Dual Airline Supplied Air Respirator,
remove the cartridge adapters. To remove them:
a. Turn the adapters counter clockwise.
b. The 6895 is the Cartridge Adapter Gasket. Replace the gasket
when it is distorted, does not stay seated or is damaged.
7) The 7887 Inhalation Valve Gasket. Replace the gasket when it is
distorted, does not stay seated or is damaged. To remove it:
a. Place a finger under the gasket and pull up.
8) The 7999 is the Air Inlet Gasket. Replace the gasket when it is
distorted, does not stay seated or is damaged. To remove it:
a. Place a finger under the gasket and pull up.
9) The 7918 is the Exhalation Valve Cover. Replace the cover when it is
damaged or the plastic is fatigued. To remove it:
a. Lift out on the two top prongs on either side of the center opening.
b. Slide the cover down.
10) The 7283 is the Exhalation Valve. Replace the Exhalation Valve when
it is warped, distorted, cut, split or if it will not seat properly. To remove
it:
a. Grasp the valve and pull it out by the edges.
7800 - Disassembly
© 3M June 2006. All rights reserved.
11) The 7914 is the Band Clamp. Replace the clamp when it is distorted or
damaged. To remove it:
a. Untighten and loosen the screw on the clamp with a Phillips head
screwdriver:
b. Remove the clamp.
12) The 7881 and 7981 Small-Size are the Nose Cup Assemblies. They
include the 7882 Nose Cup Valve Assembly. Replace the nose cup
when it is damaged or distorted. To remove it:
a. Pull it away from the facepiece.
b. To remove the 7882 Valve Assembly, push it out of the nose cup.
13) The 7916 is the Breathing Room Assembly. Replace the assembly
when it is dirty or damaged. To remove it:
a. Remove the breathing room from the front of the facepiece by
pulling up while twisting.
14) The 7895 is the Speaking Diaphragm Kit. Replace the kit when it is
damaged or does not seat properly. To remove it:
a. Use the diaphragm removal tool to turn the diaphragm retaining
ring counterclockwise and remove.
b. Push the diaphragm out of the facepiece from underneath using the
eraser end of a pencil or similar object.
15) The 7282 is the Inhalation Valve. Replace it if warped, distorted, cut,
split or will not seat properly. To remove it:
a. Locate the valve on the posts inside the facepiece.
b. Lift the valve from the valve seat.
c. The 7886 is the DIN Connector. Do not replace the connector
unless it is damaged. If it must be removed call 3M Technical
Service at 1-800-243-4630.
7800 - Disassembly
© 3M June 2006. All rights reserved.
16) The 7893S is the Head Strap Assembly. The head straps should be
replaced when they are ripped, worn, cut or damaged. To remove the
head straps:
a. Push the strap buckle away from the locking tab.
b. Remove the head strap from the facepiece.
17) The 7884 is the Lens. The lens should be replaced when it is cracked,
crazed or difficult to see through. To remove it:
a. Loosen or remove the two screws on either side of the lens with a
Phillips head screwdriver.
b. Remove the top and bottom lens frame and remove the lens.
c. Carefully remove the lens from the faceseal.
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