Holland FW0070 Installation, Operation And Maintenance Manual page 15

4. Ensure that the trailer is at the proper
height for coupling. The leading edge of the
trailer upper coupler plate should initially
contact the fifth wheel top bearing surface
4" to 6" behind its pivot axis as the tractor
backs under the trailer. Using low gear,
raise or lower the trailer landing gear as
required to obtain this position.
Attempting to couple with
the trailer at an improper
height could result in a false
or improper coupling and
cause damage to the tractor,
fifth wheel, or trailer.
5. Back the tractor under the trailer, keeping
the trailer kingpin centered in the throat of
the fifth wheel.
6. After picking up the trailer with the fifth
wheel, STOP, then continue backing until
the fifth wheel locks firmly on the kingpin.
Stopping helps prevent hitting the kingpin
too hard.
7. Back up tightly against the kingpin. Then
pull forward to test the completeness of
the coupling as an INITIAL check.
A direct visual inspection is
required to assure proper
coupling. Improper coupling
can pass the initial pull test.
Sound is unreliable. DO NOT
take for granted that you are
properly coupled. Get out of
the cab and look.
8. Visually check to see that the kingpin is
in the fifth wheel locks, not overhanging
the fifth wheel or caught in a grease
groove. There should be no gap between
the trailer bolster plate and fifth wheel
(Figure 15 and 16). Ensure proper
coupling by looking into the throat of the
fifth wheel. Check the locks as illustrated
in Figure 15 for type "A" locks and
Figure 16 and 17 for type "B" locks.
XL-FW482 Rev C · 2016-07-05 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
Operating Procedures
Figure 15
TYPE 'A' LOCK
BOLSTER PLATE IS FLUSH WITH FIFTH WHEEL
NO GAP
WHEN LOCKED, SWINGING LOCK (JAW)
MUST BE AROUND KINGPIN AND LOCKING
PLUNGER MUST BE VISIBLE AS SHOWN AS
VIEWED FROM THE REAR OF THE TRACTOR.
Figure 16
TYPE 'B' LOCK
BOLSTER PLATE IS FLUSH WITH FIFTH WHEEL
LOCKS CLOSED
NO GAP
Figure 17
TYPE 'B' LOCK
WHEN LOCKED WITH LOCKS PROPERLY
ADJUSTED THE YOKE WILL BE SEATED AS
SHOWN AND THE NUT AND WASHER WILL
BE SNUG AGAINST THE FIFTH WHEEL.
PLUNGER
KINGPIN PROTRUDES
BELOW LOCKS
15