Exposure to vapor can cause irritation to eyes, lungs and mu-
cous membranes. Excess exposure can cause dizziness, head-
ache, nausea, narcosis and liver and kidney damage. Contact
with liquid can cause eye and skin irritation. See page 6.
e. Apply 1/4 to 3/8 inch bead of Siliprene Adhesive from drilled hole to drilled hole around the entire plate.
Ensure entire mating surface between the register cover plate and the front wall plywood panel is coated with
this caulking after the register cover plates have been installed. Install register cover plate to front wall sealing
heat register openings using previously removed fasteners. Add a 1/4 inch of adhesive around perimeter of
affixed plate and van body. Immediately after application, wrap damp rag around finger and wipe adhesive
ensuring adhesive fully seals area. (This is also called adding a fillet).
f. If heaters are not installed, install plates to enclose heater openings. Install cover plates using Siliprene
Cement Adhesive using same bead size as register plates. The upper (horizontal) plates will not be secured
with fasteners. Place a lightweight object, approximately 5 pounds, on plate for 24 hours to allow for perma-
nent seal. The cement will provide a permanent air and water-tight seal.
g. Apply decal (CAUTION) centered between the two middle sealed heater vents. Caution will read
"CAUTION, SEALED HEAT DUCTWORK CONTAINS ASBESTOS INSULATION WHICH MAY BE CAR-
CINOGENIC. DO NOT REMOVE SEALS OR OPERATE HEATERS." This decal will be placed on the vertical
front wall between the 2nd and 3rd register plates. Stencil stating MWO has been applied will be stenciled 2 to
3 inches above the 2nd and 3rd register plates (reference paragraph 14b (2).
11. CALIBRATION REQUIREMENTS. Not applicable.
12. WEIGHT AND BALANCE DATA. Not applicable.
13. QUALITY ASSURANCE REQUIREMENTS.
a. General quality assurance inspection criteria cited shall be in accordance with TM 750-245-4.
b. Quality Control personnel shall conduct inspections and/or verify test results during and at completion
of the seal enclosure installation. Inspection shall be recorded on DD Form 1711, or DA Form 50, Acceptance
Form. Criteria for inspection is as follows:
(1) Pre-inspection of site where plates will be applied for permanently sealing heat vents to ensure
area is free from dirt, grease or oil and meet the specifications cited in paragraph 10c.
(2) A post-installation visual inspection shall be performed to ensure the bead applied between the
front wall and the plate has no gaps and ensures an air-tight seal per specifications cited in para-
graph 10e. Log book will be annotated.
(3) Each van semitrailer or van truck shall be inspected to assure equipment markings (reference
14b) have been applied. A copy of the inspection shall be maintained in the equipment log book and
the log book has been annotated of the completed inspection.
(4) Quality Control Inspector shall verify that all waste material is being handled and disposed of in
accordance with local procedures.
14. RECORDING AND REPORTING OF THE MODIFICATION.
a. Records and Reports.
(1) Refer to AR 750-10, DA Pam 738-750 and TB 9-1100-803-15 for detailed instructions on com-
pleting the following forms:
DA Form 5504 or 2407
Equipment Modification Record
DA Form 2408-5
Equipment Modification Log
DA Form 2409