14.
Secondary Lock Installation:
A.
Pre-install the secondary lock (
10
) in the
closed position in the casting. Do not
install the spring, release handle or the
secondary lock pin yet. Align the
secondary lock pin holes. Rotate the
secondary lock until it makes contact
with the casting at point (
C
) as shown in
Figure 9
. Check the rough location of the
end of the secondary lock in relation to
the swinging lock. It should be 3/16”
(0.188”) ± 1/16” (0.06”) from point (
A
)
on the swinging lock (
see Figure 9
) when
secondary lock is resting against the
casting at point (
C
).
B.
If the dimension is less than 1/8” (0.125”),
remove the secondary lock (
10
) and place
a bead of weld on the fifth wheel casting
at point (
C
) and grind smooth. If the
dimension is greater than 1/4” (0.25”),
remove the secondary lock and grind at
point (
D
) as shown in
Figure 10
.
C.
After a final check of the dimensions, coat
the lock pin hole in the secondary lock
(
10
) with Never-Seez
®
(supplied with kit).
DO NOT
use any substitute lubricant.
D.
Install the secondary lock release handle
(
9
) into the casting. Install the secondary
lock (
10
) onto the handle. Install cotter
pin (
8
) in handle and spread the cotter
pin. Drive the secondary lock pin (
3
)
through the holes in the casting and the
secondary lock and secure with cotter pin
(
2
). Install grease fitting (
25
) in lock pin
so that fitting faces the side and will be
accessible from the left side of the tractor.
Install spring (
11
) by fitting the small
diameter end over the projection on the
secondary lock (
10
) and the large
diameter end into the spring pocket in
the casting.
15.
Adjust the Fifth Wheel Locks:
Leave lock tester in closed locks for this
procedure:
Using a ratchet with 1/2” Allen
wrench, tighten the adjustment screw (
20
)
in the throat in the fifth wheel by turning
the screw clockwise until tight. Check that
the kingpin on the lock tester is square to
the swinging lock (
6
) and that the
stationary lock is square to the kingpin. If
not square, align the kingpin and/or
stationary lock as necessary and retighten
the adjusting screw. Tighten lock nut (
19
) on
the stationary lock. Loosen the adjustment
screw (
20
) by turning counterclockwise 1
1
⁄
2
turns. The locking mechanism is now
properly adjusted.
16.
Check that the secondary lock operates freely.
17.
Check the operation of the fifth wheel by
locking and unlocking several times.
Checking the Operation of the Fifth Wheel:
With the fifth wheel upright, it will function as
follows:
When the swinging lock (
6
) is open, the
release handle (
16
) will be in; the plunger (
17
)
will extend into the throat area such that the
step in the plunger is visible in the throat, as
shown in
Figure 11
, and the secondary lock
release handle (
18
) will be out with the handle
lug disengaged from the top plate casting.
Fifth Wheel Coupling:
As the lock tester is coupled to the fifth wheel,
the swinging lock closes, pushing the plunger
(
17
) back and the release handle (
16
) out.
As the swinging lock closes, the secondary lock
spring will move the secondary lock into the
closed position behind the swinging lock and
move the release handle inward. When properly
locked, the locking plunger (
17
) will be visible as
shown in
Figure 11
.
D
GRIND FLUSH IF NECESSARY BUT
DO NOT EXCEED FLUSH CONDITION
Figure 10
Figure 11
3/16 1/16
A
C
Figure 9
PLUNGER STEP
5
