TM9-2330-374-14&P
d . G r i n d the area of the bolster plate under the kingpin "mushroom" flush so
that the new kingpin will lie flat on the bolster plate.
Install the new kingpin.
L o c a t e the holes in the kingpin top in the same
e.
manner as the one removed.
f . P r e h e a t k i n g p i n a n d b o l s t e r p l a t e t o 1 5 0 F ( 6 6 C ) , a n d maintain temperature
throughout the welding process.
Weld the kingpin "mushroom" t o t h e b o l s t e r p l a t e w i t h 1 / 4 i n c h f i l l e t w e l d -
g.
t w o inches long at four equally spaced points on the edge of the flange and plug
w e l d t h e h o l e s i n t h e " m u s h r o o m " . W e l d s are to be in accordance with MIL-STD-1261,
class 3. Use 100,000 psi electrode or wire of the following specification:
e l e c t r o d e s , m i n e r a l c o a t e d , l o w hydrogen, MIL-E-2200/6 type MIL-10015 or MIL-10016.
W i r e , u s e b a r e s o l i d w i r e , l o w alloy steel, MIL-E-23765/2 type 100S-1, 100S-2 or
110S-1.
Inspect weld with dye penetrant or magnetic particle inspection.
No cracks
h.
are allowable and any cracks found must be repaired.
i . Prime and paint the top of the kingpin and bolster plate as follows: Prime,
per TT-P-636 or TT-P-664. Paint with enamel per MIL-E-52798 (color: forest green).
j. Replace
trailer
deck
that
was
removed
to
gain
access
to
the
top
of
the
kingpin.
T r a i l e r deck and kingpin
5-8
