9
OPERA
TION
General
This section contains information required for the
operation of Etnyre model trailers.
WARNING
Read these instructions thoroughly and
observe them when operating Etnyre trailers.
Operate by Authorized, Trained personnel
Only!
The trailer must be maintained in good operating
condition. Minor damage can quickly result in a major
failure if not repaired.
WARNING
Do not operate a trailer needing repair.
Do not undersize the prime mover. The prime
mover (tractor) must be compatible with the
trailer and have adequate capacity.
Do not permit the bottom of a trailer with low
ground clearance to hit or slide on or over
curbs, railroad crossings or other obstructions
that can cause damage to the trailer or stall the
vehicle.
Do not exceed either the GVWR or GAWR
shown on the certification label. These ratings
are listed for trailers at various speeds and
reflect the maximum GVWR and GAWR at
those speeds.
Keep personnel clear when loading and
unloading trailers.
Trailer to Tractor
Connecting Procedures
1. Inspect the fifth wheel area and the trailer frame
for wear, structural cracks, damaged or broken deck-
ing.
2. Check the kingpin for wear or damage. Replace it
if the diameter measures less than 1 7/8" at any point
(see figure 5).
3. Check the bolts for tightness. Tighten if required.
Refer to Table 1 for correct torque values.
4. Connect the trailer to the fifth wheel..
5. Connect the glad hands and build up reservoir air
pressure. Make sure that air line connections between
trailer and truck are made.
6. Connect the plug into the electrical socket. Make
sure that electrical connection between trailer and truck
is made.
7. Check the lights, turn signals and reflectors for
operation.
Figure 5. Inspection of Kingpin for wear
WARNING
Check to insure that the kingpin is locked into
the tractor fifth wheel.
8. Before operating the trailer, test the air brake sys-
tem using the following procedure:
a. Check the air system pressure. The system must
hold 100 PSI (7 Bar) minimum.
b. Apply the brakes. Inspect the brake action on all
the wheels for proper application.
c. Release the brakes. The brakes must release
promptly. The air pressure must discharge quickly from
the relay emergency valve.
d. Disconnect the emergency line from the trailer.
The trailer brakes must automatically apply.
e. Connect the emergency line to the trailer. The
trailer brakes must release.
9. Check the tires for proper inflation pressure. In-
spect the tires for cuts or other damage.
10. Power pack operated units, start engine and
adjust the throttle. Truck operated units, hook up hy-
draulic lines and engage the pump.
