3M L-505 Installation instructions

L-505 - Disassembly
© 3M June 2006. All rights reserved.
3M™ Bumpcap L-505 with Welding Shield
and Wide-view Faceshield
Disassembly
1) The L-112 Chin Strap or the L-114 Reinforced Chin Strap. Both are
accessories on the L-500 Series. For removal instructions on the L-114
see the L-701. Replace either chin strap when it is worn, torn or
damaged. To remove the L-112:
a. Remove the ends from the two headband slots by lifting them and
pulling outward.
2) The L-129 is the Flame Retardant Welding Bib, this is an optional
item. It should be replaced when it is excessively worn or anytime it is
torn. To remove it:
a. Pull the bib away from the two 3M™ Scotchmate™ Strips at the
rear of the headgear.
3) The L-120 is the Flame Retardant Faceseal made from SoftGuard®
DTP Disposable Thermal Protection material or the L-124 is the
Flame Retardant Faceseal. Replace either faceseal whenever it is torn,
worn excessively or has lost its elasticity. To remove either faceseal:
a. Unhook the faceseal from the tabs on each side of the extender.
b. Unhook the faceseal from the head suspension.
SoftGuard is a registered trademark of Precision Fabrics Group, Inc.
4) The L-145 is the Welding Knob. The welding knob must be used with
the welding shield. The knob should be replaced when it is worn or
missing. To remove the it:
a. Unscrew the knob and remove it from the cam.
5) The L-153 is the Welding Shield. It should be replaced when it is
damaged. To remove it:
a. Unscrew the knobs on either side of the welding shield and remove
them from the cams.

L-505 - Disassembly
© 3M June 2006. All rights reserved.
b. Remove the welding shield.
c. This is the point at which the headgear can be converted to a
wide-view faceshield. To make the headgear into a wide-view
faceshield:
i. Place an L-130 Wide-view Faceshield Assembly onto the
headgear.
ii. Use a L-141 Knob and Pivot Kit to secure it in place.
iii. User Instructions for the wide-view faceshield configuration
should then be used.
Instructions for the 3M™ Bumpcap L-505 in welding mode - continued
6) The L-137 is an Extender. The extender should be replaced when it
becomes warped or unable to seal against the jaw. It should only be
removed if it is damaged and should not be removed for cleaning. To
remove the extender from the wide-view faceshield assembly:
a. Squeeze the four yellow tabs on the extender bosses together.
b. Push the extender bosses out of the holes.
7) The L-146 is a Cam and Pivot Kit. Replace the kit when it is damaged
or missing. To remove it:
a. Insert a flat blade screwdriver into the slot on the cam clip and pull
out the cam clip, on each side of the headgear.
b. Remove the cam/pivot from the headgear.
c. Remove the pivot post from the cam.
8) The welding stack is a series of products that make up the welding
shade glass. To remove them:
a. Gently pull the wire clip toward the faceshield chin until it is out of
the two slots in the lens frame, then pivot it up out of the way.
b. Carefully remove the parts in the lens stack.

L-505 - Disassembly
© 3M June 2006. All rights reserved.
c. The Shade Glass Welding Stack consists of:
i. The L-162 Safety Plate. The safety plate should be
replaced when it is damaged or missing.
ii. The next piece in the stack is a shade glass. This is not a 3M
part, but it can be purchased at a welding supply store in the
shade desired. It should be a standard 4 ½ inches by 5 ¼
inches welding shade glass.
iii. The L-149 is a Fiber or Plastic Gasket Spacer. The spacer
should be replaced when it is damaged or missing.
iv. The L-142 is a Welding Gasket. It should be replaced when
it is damaged or missing.
v. The L-152 is a Cover Plate. It should be replaced when it is
damaged or missing.
vi. The L-147 is the Welding Lens Retainer Clip. It should be
replaced when it is damaged or missing.
d. The Electronic Lens Welding Stack consists of
i. The L-156 Electronic Lens and Adapter for use with the
electronic lens assembly only. It should be replaced when it
is damaged or missing.
ii. The L-142 is a Welding Gasket. It should be replaced when
it is damaged or missing.
iii. The L-152 is a Cover Plate. It should be replaced when it is
damaged or missing.
iv. The L-147 is the Welding Lens Retainer Clip. It should be
replaced when it is damaged or missing.
9) The L-131 is the Wide-view Lens. The lens should be replaced
immediately when excessively scratched or anytime it is cracked, crazed
or does not stay seated. To remove the wide-view lens:
a. Turn all four L-shaped latches a quarter-turn (all the way against
their stops), so they point toward the bottom edge of the faceshield.

L-505 - Disassembly
© 3M June 2006. All rights reserved.
b. Flex the lens inward so it is free of the four latches in the wide-view
faceshield frame. Lift the lens from the frame while sliding it out
from under the lower post.
10) The L-136 is the Cam Spring Set. The cam spring set should be
replaced when the faceshield will no longer stay in the up or down
position or when the faceshield is loose in the closed position. The
springs should only be removed if they are damaged and should not be
removed for cleaning. To remove the cam spring set:
a. Insert a flat blade screwdriver under the spring and lift the spring
out.
11) The L-134 is the Latch Kit. Replace the latches when they are broken
or missing. Do not use the headgear until the latches are in place. To
remove the latches:
a. Use a pliers to grasp the base of the L-shaped latch.
b. Pull forcefully on the latch until it is removed.
12) The L-113 is the Head Suspension. Replace the head suspension
when it is damaged or broken or the ratchet will not tighten. To remove it:
a. Turn the headgear upside down.
b. Remove the head suspension by pulling out the four mounting clips
that hold it into the bottom edge of the headgear.
c. To remove the L-117 Hanger Suspension from the headband, turn
the four ladder tabs a quarter-turn, then pull them out of the slots in
the headband.
13) The L-116 is the Head Pad. Replace the head pad when it is
excessively dirty or damaged. To remove it:
a. Pull it out of the four slots in the hanger suspension.
14) The L-115 is the Sweat Pad. Replace it when the foam on the sweat
pad begins to degrade or the pad gets dirty or damaged. To remove it:
a. Release the three snaps that are located around the headband.

L-505 - Disassembly
© 3M June 2006. All rights reserved.
15) The L-165 is the Head Seal Kit. The head seal kit should be replaced if
it is damaged or missing. To remove it:
a. Pull the 4 head seal tabs out of the slots on the bottom edge of the
headgear. They are glued in place so this may be difficult. Use a
screw driver to push the tabs out of the slots.
NOTE: The head seals are permanently bonded in place in the
bumpcap and should not be removed unless they need to be
replaced. Please review the instructions in the Head Seal
Replacement Kit for detailed instructions.
16) The L-550 is the Bumpcap Shell. The bumpcap shell should be
replaced if it is cracked and/or damaged by contact with solvents.
17) L-133 is the protective Lens Cover. Lens covers can be ordered in
packs of 100 or 25.
a. Up to 5 lens covers can be placed on the lens, one at a time. When
the top cover gets dirty, peel it off to reveal a clean cover.
b. The lens cover closest to the lens should not be removed in the
work area where your lens can get dirty.
18) The L-183 is the Headgear Cover Accessory. It is an optional
accessory which provides a means of protection against buildup of
particulate on the surface of the headgear shell. It should be replaced if it
is ripped, torn, the stitching is worn, the seams are frayed or holes are
found in it. To remove it:
a. Pull it off the headgear.
b. Remove the breathing tube and pull the headgear cover off the
breathing tube.
19) The L-182 is the Air Deflector Accessory. The L-182 is an optional
accessory which allows the redirection of the airflow towards the face. If
used, the air deflector should be replaced if it is damaged or missing. To
remove it:
a. Pull it off of the front of the headgear shell.