3
OPERATING INSTRUCTIONS
3-1
GENERAL
This section supplies information for operation
of the semitrailer. It describes and locates controls
and gives operation procedures. Read all instruc-
tions, warnings, cautions, and danger notes before
attempting to operate the semitrailer. Operators
must have proper training before operating the
semitrailer.
(See Figure 3-1 for location of semi-
trailer parts.)
WARNING
DO NOT OPERATE THE SEMITRAILER
WITH ANY KNOWN FAULT THAT
MIGHT ENDANGER THE OCCUPANTS,
NEARBY WORKERS, OTHER TRAFFIC,
THE LOAD, OR THE EQUIPMENT.
WARNING
DO NOT OPERATE THE SEMITRAILER
UNTIL YOU HAVE READ THE OPERA-
TOR’S MANUAL AND COMPLETELY
UNDERSTOOD THE PROPER USE AND
FUNCTION OF ALL CONTROLS. IM-
PROPER USE CAN CAUSE PERSONAL
INJURY, DAMAGE TO YOUR SEMI-
TRAILER AND CARGO, AND CAUSE
TIME-CONSUMING BREAKDOWNS.
3-1.1
Landing Gear
The landing gear consists of two legs, one on
each side of trailer, with a tube telescoping within
another tube. Crank style is standard
(See Figure
3-3 for crank handle location)
. Pin drop style is
optional.
3-1.2
Parking Brake
The parking brakes are automatically applied
by spring pressure within the air actuators of the
braking system when air pressure in the emer-
gency line drops below 50 psi. This may be done
within the truck using trailer parking/emergency
valve or by disconnecting the emergency glad-
hands.
3-1.3
Air Brake System
The air brake system of the semitrailer is oper-
ated from the towing vehicle after coupling to the
semitrailer. The towing vehicle’s air system must
be coupled to the semitrailer and charged to 90 psi
minimum before the brakes can adequately func-
tion.
3-1.4
Anti-lock Brake System (ABS)
The Anti-Lock Brake System of the semitrailer
is constantly powered by the auxiliary (blue) circuit
of the seven way electrical connector, with backup
power from the stop lamp (red) circuit, and ground
through the white wire. It is necessary that the blue
circuit is hot when the tractor key switch is on. The
blue circuit on the trailer may not be used to power
any additional auxiliary devices while the semi-
trailer is moving forward. If a fault exists in the
ABS, normal braking will occur, but wheels may
lock. Service the ABS as soon as possible.
CAUTION
THE AUXILIARY (BLUE) CIRCUIT IS
FOR POWERING THE SEMITRAILER
ABS. THIS CIRCUIT MUST BE HOT
WHEN THE TRACTOR KEY SWITCH IS
ON. NO OTHER ELECTRICAL DEVICES
MAY BE POWERED BY THIS CIRCUIT
WHILE THE SEMITRAILER IS MOVING
FORWARD.
CAUTION
IF A FAULT EXISTS IN THE SEMI-
TRAILER ABS, NORMAL BRAKING
WILL OCCUR, BUT WHEELS MAY
LOCK. SERVICE THE ABS AS SOON
AS POSSIBLE.
3-1
Summary of Contents for 900B Series
Page 8: ......
Page 12: ......
Page 52: ...4 12 Figure 4 5 Wired Remote Control Diagrams...
Page 53: ...4 13 Figure 4 6 Tandem Triple Axle Air Ride Suspension Figure 4 7 Air Ride Height Adjustment...
Page 56: ...4 16 Figure 4 9 Checking Axle Alignment Figure 4 10 Examples of Camber...
Page 61: ...4 21 Figure 4 13 Axle and Brake Assembly...
Page 71: ...4 31 Figure 4 21 Crank Landing Gear Assembly...
Page 81: ...5 9 NOTES...
Page 82: ......