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 is to be removed can be taken off.
Place
jacks
or
hydraulic dolly under trunnion cross tube and take up
weight. Block up rear corners of body frame with
support
stands
or
support
by
overhead
crane.
(2)
Remove
wheels
52b).
(3) Remove flexible air or hydraulic lines from axles and/or
brake air chambers.
(4) Adjust jacks under trunnion cross tube to take weight
Remove four hex nuts (Z) and
of spring off axle.
(Y)
from
two
U-bolts
(M).
Remove
(J-bolts and raise and remove spring saddle (L).
Loosen two hex-head bolts (P) which clamp spring
in
spring
seat
(K)
and
lift
spring
from
seat.
Should
spring
be
seized
in
seat,
jack
rear-rear
axle
higher,
to force it out.
C a u t i o n : Make sure that force required to free spring
from seat does not lift semitrailer off supports under
body
frame.
(5)
Remove
upper
rod
(par.
88a)
from
rear-rear
axle.
(6) Revolve axle to free ends of spring from spring guide
bracket assembly (C, fig. 57).
(7) Lift spring and withdraw end from spring guide bracket
on
forward-rear
axle.
b. Cleaning.
Clean mud and dirt from spring with water
Grease can be removed with mineral spirits
and
stiff
brush.
paint thinner or dry-cleaning solvent.
c.
Inspection
and
Repair.
Inspect leaves and clips for cracks
Note whether excessive wear is apparent on lower
or breaks.
leaf at contact of spring bearing plate (D, fig. 57). Replace
worn
or
defective
leaves
and
clips
(d
(2)
and
(5)
below).
Inspect spring bearing plates and spring guide side plates riv-
If worn to extent
eted to inside of spring guide brackets.
they will need replacement before next overhaul, replace (par.
87(a ) .
d. Disassembly and Assembly of Spring.
N o t e . The
key
letters
noted
in
parentheses
are
in
(1) G e n e r a l . . Generally,
springs
will
be
disassembled
into
separate leaves only for replacement of broken leaves.
(2) D i s a s s e m b l y
Clamp
spring
in
arbor
press
or
vise,
or
put
C-clamp
over
spring
near
center
bolt
(A-17)
to hold leaves in place after leaf' clips (A-6 and A-13)
File
or
grind
and center bolt have been removed.
126
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