freightliner PE116DC, Руководство по обслуживанию

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2. Thoroughly steam clean the fifth wheel.
3. Check for cracks in the fifth wheel assembly,
mounting brackets, and mounting parts.
4. Ensure that both bracket pins are in place and
secured by retainer pins and cotter pins. See
Fig. 2 .
5. For fifth wheels equipped with bracket liners,
rock the fifth wheel. If it does not rock freely, re-
move the top plate and inspect the bracket lin-
ers. Replace liners that are broken or less than
0.125 inch (3 mm) thick at the top of the liners.
For the liner replacement procedure, see the
Fontaine website,
www.fifthwheel.com .
6. Check the jaw and stationary jaw for mushroom-
ing, and check that the serrations at the jaw and
wedge are in good condition.
7. Test the secondary safety lock latch for ease of
operation.
8. Check for loose nuts or bolts on the fifth wheel
and the mounting. Set a torque wrench to the
maximum torque value for the bolt being
checked, and confirm that the torque is to speci-
fication. Do not loosen the bolt to check the
torque. For torque specifications, see
Group 00
of the vehicle Workshop Manual.
9. Check all springs to see if they are securely fas-
tened, and are not deformed.
WARNING
Do not disassemble the fifth wheel to inspect the
springs. The springs are under extreme pressure,
and could cause serious injury.
10. Check the wedge adjustment.
10.1 Close the fifth wheel on a standard 2-inch
(50-mm) kingpin or similar 2-inch (50-mm)
diameter shaft so that it locks.
10.2 Push on the wedge stop rod with hand
pressure. It should move in 1/4 inch (6
mm) and spring back out on release.
If the free travel is not 1/4 inch (6 mm),
adjust the distance to 1/4 inch (6 mm) by
turning the wedge stop rod, on the right
side of the top plate, clockwise to reduce
the gap and counter-clockwise to in-
crease it.
11. 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.
12. After inspecting the fifth wheel, lubricate all mov-
ing parts with a chassis or multipurpose grease.
Apply a generous coating of grease to the top
plate to fill the grooves, or depressions, on the
top plate. See
MOP 31–02 in this manual for lu-
brication instructions.
Jost
1. Disconnect the tractor from the trailer. For in-
structions, see the vehicle Driver’s/Operator’s
Manual.
2. Thoroughly steam clean the fifth wheel.
3. Check the mounting for missing or damaged fas-
teners, and broken components. Replace or re-
pair as needed.
4. Inspect the bracket pin bolts. Make sure the lock-
ing tabs are properly securing the bolts in place.
See
Fig. 3 .
5. Check the fifth wheel for bent, worn, or broken
parts. Replace as needed.
6. If the fifth wheel is equipped with low-lube plates,
check the plates and replace if damaged or worn
down to the securing bolts. It is normal for out-
side edges of the plate to pucker slightly; this
does not affect performance.
7. Check the fifth wheel adjustment. Using a lock
tester, lock and unlock the fifth wheel several
times. Make sure that the locking mechanism
works properly.
The lock is properly adjusted if: the wheel locks
and unlocks easily each time and the lock tester
rotates freely.
The lock is too loose if: you feel fore-aft play
when pulling and pushing on the lock tester
handle. See
Fig. 4 , Ref. A.
The lock is too tight if: the lock tester does not
rotate freely in the lock. See Fig. 4 , Ref. B.
8. If the lock is improperly adjusted, correct as fol-
lows.
If the lock is too tight, loosen the jam nut, turn
the adjustment bolt clockwise one full turn, then
Frame and Frame Components
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