TM-9-3990-260-14-P

CONTAINER ROLL-IN/OUT PLATFORM (CROP) MODEL M3 AND MODEL M3A1

TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

JULY 2001
TM-9-3990-260-14-P

  TM-9-3990-260-14-P - Page 213 of 306

TM 9-3990-260-14&P
Change 1
10-7
(3)
A-Frame
. Solid welds in the A-frame area are necessary to ensure safe loading and unload-
ing of the CROP.
(4)
Hookbar
. These welds are located at the base of the hookbar casting on the A-frame of the
M3A1 CROP. These welds secure the hookbar to the A-frame and are subjected to a signif-
icant portion of the total load during loading and unloading operations.
(5)
MIL-STD-209 Multipurpose Rings
. The large D-rings of the CROP are used for transporta-
tion. They may be used to secure the CROP to a trailer or railcar.
(6)
Crossmembers
. These welds are located at the junction of the crossmember and the main
rails.
(7)
Decking
.
(8)
Main Rails
. The main rails provide a major portion of the load carrying capacity of the
CROP. They support a portion of the load while loaded on the truck and trailer.
b.
Removing the CARC Paint Primer and Galvanizing Coatings Prior to Weld Repair.
NOTE
There are three options to repair a weld: 1) oxyacetylene torch; 2) sandblasting, or; 3) surface
grinding. Use one of these options to remove CARC paint, primer and galvanizing prior to weld
repair.
Use a respirator when removing paint, primer and galvanizing with an oxyacetylene torch because
of the toxic gases.
NOTE
The galvanizing must be heated to 860°F (460°C) before it will melt.
(1)
Option One
. Use an oxyacetylene torch and a stainless steel wire brush to remove the paint,
primer and galvanizing.
(a)
Using oxyacetylene torch, heat galvanizing to 860
°
F (460
°
C).
NOTE
Use the brush within 1.5 inches (38 mm) on both sides of repair area.
(b) Once the galvanizing starts to melt, use a stainless steel wire brush to remove paint,
primer and galvanizing.
(2)
Option Two
.
(a)
Cover the area around the weld repair with masking tape (about one inch on each side
of the anticipated weld deposit). This will protect the other areas of the CARC finish
not being repaired.
(b) Use sandblaster to remove paint, primer and galvanizing.
(3)
Option Three
. Use surface grinder (hand grinder) to remove paint, primer and galvanizing
within one inch on either side of the anticipated weld deposit.
CAUTION
Do not weld the CROP while on trailer or truck or damage to equipment may result.


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