Freightliner FLA/FLB/FLC/FLD/FLL. Manual — part 19
7.3
Install the fifth wheel top plate, bushing
pins, and roll pins.
8.
Inspect for fatigue or cracked welds.
9.
Replace cracked, worn, or damaged parts with
new parts. Replace all loose mounting bolts with
5/8–11 SAE grade 8 bolts, grade C locknuts, and
hardened washers.
Do not
re-use bolts, nuts,
and washers on fifth wheel mountings.
10. After inspecting the fifth wheel, lubricate all mov-
ing parts with a chassis or multipurpose grease.
See
for lubrica-
tion instructions.
Castloc II and Simplex Series
1.
Disconnect the tractor from the trailer. For in-
structions, see the vehicle driver’s manual.
2.
Thoroughly steam clean the fifth wheel.
3.
Check the fifth wheel plate for cracks. Check for
sharp edges on top; the chamfer should be 1/8
to 1/4 inch (3 to 6 mm).
4.
When the wheel is locked, the safety latch must
swing free and fall freely into position. See
f310476
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19
1.
3/16 x 1 Cotter Pin
2.
Lower Bracket Retainer Pin
3.
Grease Fitting
4.
Lower Bracket Pin
5.
Wedge Stop Rod
6.
Flatwasher
7.
Wedge Stop Rod Spring
8.
Wedge Stop Rod Nut
9.
Side Release Upper Assembly
10. Leaf Spring
11. 1/4–20 x 3/8 Thread-Cutting
Screw
12. Step Jaw and Wedge
13. Jaw Spring
14. 1/4 x 3 Cotter Pin
15. Timer
16. Wedge Spring
17. Pull Handle
18. Bumper Handle Spring
19. 1/2–13 x 2 Bumper Pivot Bolt
20. Bumper
21. Flatwasher
22. 5/16" Bumper Pivot Bushing
23. 1/2–13 Locknut
24. 7/16" Handle Pivot Bushing
25. Operating Handle (side-release
only)
26. 1/2–13 x 2 Handle Pivot Bolt
Fig. 1, Fontaine H5092 Series Fifth Wheel (left-side-release shown)
Frame and Fifth Wheel
31
31/2
5.
The lever bar and operating handle must be in
proper alignment. See
. Compare the lever
bar and operating handle alignment to a new, or
a properly operating lever bar and operating
handle. Replace any bent or misaligned lever bar
or operating rod.
6.
Check all cotter pins for cracking or damage. Re-
place any cotter pin that shows any signs of
damage.
7.
Level the fifth wheel plate to a horizontal posi-
tion. Measure the height from a stationary
mounting point (see
, Ref. 3), such as the
08/29/95
f310472
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1.
Locknut, 3/4–16
2.
Washer
3.
Rubber Washer
4.
Lock Adjustment Tag
5.
Yoke Shaft
6.
Yoke Sub-Assembly
7.
Torsion Spring
8.
Roll Pin
9.
Secondary Lock, Right-Hand
10. Cam Plate
11. Lock Guard
12. Pin
13. Lock Pin
14. Lock Jaw
15. Washer
16. Right-Hand Release Handle
17. Left-Hand Release Handle
18. Secondary Lock, Left-Hand
Fig. 2, Holland Fifth Wheel
Frame and Fifth Wheel
31
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frame rail to the top of the fifth wheel plate (Ref.
1). Pry up on the fifth wheel plate (Ref. 4) below
the pin boss, and measure the vertical move-
ment (Ref. 5). The bracket connection provides a
9/32-inch (7-mm) vertical clearance to provide
cushioning and to avoid downward pin-loading
while retaining minimum plate lift. If the plate lift
(Ref. A) exceeds 5/16 inch (8 mm) as a result of
wear or rubber deterioration, install new, stan-
dard or oversized bracket-shoe rubber pads; see
Group 31 of the
Heavy-Duty Trucks Service
Manual
for replacement instructions.
NOTE: Do not measure plate lift immediately
after a trailer has been uncoupled from the fifth
wheel. The rubber may have taken a temporary
set, which will normally recover after being un-
coupled for a short period of time.
8.
Check all mounting bolts for signs of fatigue, and
tighten them to the proper torque. For torque
specifications, see
of this manual. In-
spect all angles, plates, and brackets for cracks
or other damage.
9.
Replace cracked, worn, or damaged parts with
new parts. Replace all loose mounting bolts with
5/8–11 SAE grade 8 bolts, grade C locknuts, and
hardened washers.
Do not
re-use bolts, nuts,
and washers on fifth wheel mountings.
10. After inspecting the fifth wheel, lubricate all mov-
ing parts with a chassis or multipurpose grease.
See
for lubrica-
tion instructions.
ASF Touchloc
™
Control Mechanism
General Inspection
1.
Replace cracked, broken, bent, or missing parts
with new parts. See
2.
The cotter pin located in the slide cam clevis pin
must be in place and properly spread.
f310353b
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1.
Lubricant Grooves
2.
Safety Latch
3.
Lock Control Handle
4.
Mount
Fig. 3, Simplex Series Fifth Wheel
09/15/95
f310470
1
2
1.
Operating Handle
2.
Lever Bar
Fig. 4, Lever Bar and Operating Handle Alignment
f310475
08/31/95
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A
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5
A. Extended Top Plate Lift Height
1.
Fifth Wheel Top Plate
2.
Fifth Wheel Frame Mount
3.
Frame Rail
4.
Lifting Point
5.
Static Top Plate Height
Fig. 5, Measuring Fifth Wheel Top Plate Lift
Frame and Fifth Wheel
31
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3.
The locknut that attaches the air cylinder to the
housing weldment must be tight, but should not
distort the cylinder clevis legs inward.
4.
Check all mounting bolts for tightness.
NOTE: A sluggish slide cam may be improved
by spraying the slide cam, track, and inside of
the rectangular slide cam housing with a prod-
uct such as light oil, silicon lube, or equivalent.
ASF Touchloc
™
Control Mechanism
Lubrication
1.
With the air cylinder and the slide cam in the re-
tracted position, lubricate the cam track with a
light oil-type lubricant. See
2.
If the operating rod plate casting track is rusted,
apply penetrating oil (with teflon) to remove the
rust. Apply white lithium grease into the track.
3.
Remove the extension spring for easy access.
4.
Activate the cab control valve, moving the oper-
ating rod into lockset (unlocked mode) position.
5.
Lubricate the slide cam shaft.
6.
Spray lubricant into the rectangular slide cam
housing.
7.
Replace the extension spring.
8.
Cycle the slide cam several times to ensure
smooth operation.
9.
Lubricate the air mechanism unit each time the
tractor is steam cleaned.
ASF Touchloc
™
Control Mechanism
Component Inspections
1.
Thoroughly inspect the air cylinder (
). It
must retract and extend throughout the operating
range without any interruption of piston travel.
The air cylinder is in satisfactory working order
upon completion of six consecutive extensions
and retractions at 90 to 120 psi standard operat-
ing pressure.
If the air cylinder does not function properly, re-
move the air cylinder. Manually extend the piston
to its maximum length, and retract fully. Any bind-
ing of the piston requires reconditioning or
replacement.
2.
Inspect the slide cam and housing for any
warpage, damage, or cracks. If any cracks are
found, replace the components.
3.
Check the return spring for overextension, abra-
sion, and a rust-deteriorating condition which
would require replacement.
f310549
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09/12/96
1.
Cotter Pin
2.
Locknut
3.
Mounting Bolts
4.
Slide Cam
Fig. 6, Touchloc Control Mechanism General Inspection
f310548
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10/17/96
1.
Extension Spring
Fig. 7, Touchloc Control Mechanism Lubrication
Frame and Fifth Wheel
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