Riveted Connection Repair.

TB 9-2300-247-40

accessibility for frame repair is limited to the following:

40 other cold-rolled are acceptable for

vehicle structural frame repair.

Miscellaneous brackets; riveted or bolted.

Axle assemblies and related components.

Bolt/Rivet hole connections.

Crossmembers; riveted or bolted.

Where new bolts are to be installed in

Fifth wheels.

prepared rivet holes, the rivet holes shall be

prepared as specified in paragraph above.

Miscellaneous service lines and other minor

Bolts installed in prepared rivet holes shall,

interferences.

in all cases, be new No. 8, UNF with new

Vehicle cabs.

washers and UNF locknuts. Installed bolts

Crossmembers, gussets or brackets directly

shall make a tight fit. No clearances or

welded to vehicle frames will not be removed to

looseness is permitted.

Reamed or

gain accessibility for vehicle frame repair.

enlarged holes to accept the new bolts,

shall in no case, exceed the diameter of the

NOTE

original unprepared hole by more than 1/16-

Anchor bolts used to secure

inch.

components listed above may be

removed for access to repair frame

Bolted reinforced plate connections.

defects.

Repairs using bolted connections usually

require reinforcement this is accomplished

17.

Riveted Connection Repair.

by the addition of steel reinforcing members

across the area of the repair. These

Rivet hole preparation. Rivet holes shall

reinforcing members usually require more

area surrounding the defect than similar

be prepared to receive new No, 8-UNF

welded or riveted connections.

This

bolts. Holes shall be reamed to provide a

additional area is required because bolt

tight fit for the new bolt. Now clearances or

diameter and bolt spacing are critical to the

looseness will be allowed in the new

strength and rigidity of the repair. For most

installation. In the event that the holes

reinforced plate connections used in frame

must be enlarged or reamed for alinement,

repair, the recommended maximum bolt

or for other reasons, caution should be

diameter to be used is 1/2-inch. Larger bolt

taken during the process to insure that the

diameters are not recommended because

diameter of the original rivet hole is not

of the size of standard side rail cross

exceeded by more that 1/16-inch.

section and the loss of strength of the side

rail member which may result from larger

Bolted frame connections. Bolted frame

bolt mounting holes. Minimum bolt spacing

connections are normally accomplished to

for repair of the types of vehicle frames and

replace rivets removed, to reinforce weld

framing members specified in the manual

repairs,

replace

defective

bolted

will not be less than 3 inches measured

connections, and to provide new bolted

center-to-center from each bolt.

For

connections (new framing members or

deviations from these restrictions, and for

components). When bolted connections

other bolted frame repair applications not

are used to complete vehicle frame repair,

covered in this manual, refer to the specific

new bolts, new washers and new locknuts

vehicle TM for the frame proposed for

must be used. Under no conditions will

repair. In cases where larger bolts or rivets

bolted frame repairs be made with used

were used by the manufacturer of the

hardware. Unless otherwise specified in

vehicle frame, these bolts or rivets must be

the appropriate vehicle TM or other

replaced with larger sizes after being

governing document, Grade 8, United

removed. Refer to the vehicle TM for

National Fine (UNF) bolts will be used in all

acceptable limits. Where welded/reinforced

bolted frame repair or new component

additions to framing members. No United

National Course (UNC) or TB 9-2300-247-