ALL WHEELED VEHICLES: USE OF SWIVEL-TYPE HOOK FOR SECURING TIRE CROSS CHAINS

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

ALL WHEELED VEHICLES: USE OF SWIVEL-

TYPE HOOK FOR SECURING TIRE CROSS

CHAINS

Headquarters, Department of the Army, Washington, D. C.

15 November 1965

Table 1. Tire Sizes and Swivel Hook Federal Stock

1. Purpose. This bulletin provides information to using

Numbers

personnel on the use of a new swivel-type tire cross

chain end hook.

2. General. The new swivel hook is presently available

in four sizes. The size of swivel hook that is to be used

is based on tire chain size, which is determined by the

wheel or tire size.

Table 1 lists the tire sizes from which the required swivel

hook Federal stock number can be determined. The

table is applicable to both single-type (TS) or double-type

(TD) chains.

The three larger size hooks are provided with washers,

whereas no washer is included with the smallest size

hook.

The washer improves the hook rotating

characteristics of the larger hooks and allows the cross

chains to rotate on the tires. This rotation prevents the

cross chain from wearing too quickly on one side and

increases its service life. Swivel hooks can be installed

or replaced without use of tools, provided the old cross

chain end links are removed.

3. Availability. The swivel hooks are currently available

in the supply system. The hooks will be listed as

authorized tire chain repair parts in TM 9-2300-223-20P

at time of next change or revision.

4. Application. New swivel hooks are not to be installed

unless a specific cross chain requires replacement. A

replacement cross chain now includes connecting end

links which must be removed and discarded from each

end of the cross chain. In the future, cross chains will be

provided without the end links. Remove end links by

spreading end link with a suitable tool.

Refer to TM 9-1870-1. Also, refer to this manual to

determine the correct number of cross