Landoll 825E User manual

F-844-0117 01/2017
LANDOLL CORPORATION
1900 North Street
Marysville, Kansas 66508
[phone]
800-428-5655 ~ WWW.LANDOLL.COM
Model 825E/835E/845E Series
Detachable Semitrailer
Operator’s Manual

F-844-0117 i
Table of Contents
1 Introduction and Safety Information
Introduction .............................................................. 1-1
Understanding Safety Statements ............................................. 1-2
2 Standard Specifications
General Torque Specifications (rev. 4/97) ....................................... 2-3
Hydraulic Fitting Torque Specifications ......................................... 2-4
3 Operating Instructions
General ................................................................. 3-1
Parking Brake ............................................................ 3-1
Air Brake System .......................................................... 3-1
Anti-Lock Brake System (ABS) ............................................... 3-1
Electrical ................................................................ 3-3
Hydraulic ................................................................ 3-3
Pre-Coupling of Semitrailer and Tractor ........................................ 3-3
Coupling of the Tractor to the Semitrailer ....................................... 3-4
Connecting Tractor Services to the Semitrailer ................................... 3-4
Tractor and Semitrailer Check-Out ............................................ 3-5
Towing the Semitrailer ...................................................... 3-6
Parking the Trailer ......................................................... 3-7
Uncoupling Towing Vehicle from Semitrailer ..................................... 3-7
Trailer Lift Lever .......................................................... 3-7
Pull Out Extensions ........................................................ 3-9
Swingout Outrigger Platform Extension Set-Up ................................. 3-10
Preparation for Loading and Unloading ........................................ 3-11
Loading the Semitrailer .................................................... 3-13
Securing the Load ........................................................ 3-13
Preparation for Transport .................................................. 3-14
Unloading the Semitrailer .................................................. 3-14
Work Light (Option) ....................................................... 3-15
Air Ride Operation ........................................................ 3-15
Manual Height Control Operating Instructions (825, 835, & 845 Ag) (Tail Plate) .......... 3-15
Normal Highway Operation ................................................. 3-15
Raising or Lowering ....................................................... 3-15
Operating Instructions (835 Construction) (Curbside Bolster) ........................ 3-16
Normal Highway Operation ................................................. 3-16
Lift Axle Operation (Option) (Used on Rigid Three Axle Frame) ....................... 3-16
Suspension Operation (Axle Down) .......................................... 3-16
Axle Lift Operation (Axle Up) ................................................ 3-16

ii F-844-0117
Third Axle Flip Operation (Option) ...............................................3-17
Flip Axle Up .............................................................3-17
Flip Axle Down ...........................................................3-17
Winch Controls ...............................................................3-19
Free Spool Clutch Operation (Warn Winch) ....................................3-20
Free Spool Clutch Operation (DP Winch) ......................................3-20
Free Spool Clutch Operation (Braden) ........................................3-21
Front Extension/Bulkhead (Option) ...........................................3-22
Anti-Lock Brake System (ABS) ..............................................3-23
Cold Weather Operation ...................................................3-24
Hot Weather Operation ....................................................3-24
4 Maintenance and Lubrication
Maintenance Schedule ..........................................................4-1
Inspection ...............................................................4-1
Lubrication ...............................................................4-1
Maintenance Procedures ........................................................4-6
Repair Parts ..............................................................4-6
Tools and Equipment .......................................................4-6
Torque Values ............................................................4-6
Cleaning .................................................................4-6
Gooseneck, Frame, and Deck ....................................................4-6
Repairing Structural Defects .................................................4-6
Hydraulic System ..............................................................4-7
General .................................................................4-7
Hydraulic Engine Package (Option) ...............................................4-7
Electrical System ..............................................................4-7
Suspension Maintenance .......................................................4-8
Air Ride Suspension .......................................................4-8
Air Ride Height Adjustment .................................................4-10
Alignment ...................................................................4-11
Wheel Alignment .........................................................4-11
Axle Alignment ...........................................................4-13
Manual Alignment Procedure ...............................................4-13
Air Ride Suspension Axles .................................................4-13

F-844-0117 iii
Brake System Maintenance ..................................................... 4-14
General ................................................................ 4-14
Spring Air Brake Chambers ................................................. 4-14
Caging the Power Spring .................................................. 4-14
Removal ............................................................... 4-15
Installation .............................................................. 4-15
Emergency Relay Valve Maintenance ........................................ 4-15
Brake Assembly Maintenance ............................................... 4-15
Brake Adjustment ........................................................ 4-16
Disassembly for 16-1/2” x 7" Brakes .......................................... 4-16
Reassembly for 16-1/2” x 7" Brakes .......................................... 4-16
Automatic Slack Adjuster .................................................. 4-18
Operational Check ........................................................ 4-18
Replacing Slack Adjuster .................................................. 4-18
Adjusting Slack Adjuster ................................................... 4-19
Hub and Drum Maintenance .................................................... 4-20
Wheel Bearing Lubrication and Adjustment ....................................... 4-22
Adjustment ............................................................. 4-22
Tire Maintenance ............................................................. 4-22
Tire Inflation ............................................................. 4-22
Tire Matching ............................................................ 4-23
Tape Measuring Method ................................................... 4-23
Straight Edge or String Method .............................................. 4-23
Mounting Tire and Wheel .................................................. 4-24
5 Troubleshooting Guide
Electrical ................................................................ 5-1
Tires, Wheels, & Suspension ................................................ 5-2
Brakes .................................................................. 5-4
Brake Drums ............................................................. 5-6
Hydraulic System ......................................................... 5-7

1-1
Chapter 1
Introduction and Safety Information
Introduction
This manual provides operating, servicing, and maintenance instructions for Model 825E/835E/845E semitrailer,
manufactured by Landoll Corporation, Marysville, Kansas 66508.
CHAPTER 1 Gives basic instructions on the use of this manual and understanding the safety
statements.
CHAPTER 2 Gives product specifications for the trailer, including measurements and component
specifications. A Standard Bolt Torque Table is provided to give guidelines for bolt
torques to be used when servicing this product.
CHAPTER 3 Gives instructions for the proper operation of the equipment.
CHAPTER 4 Gives general maintenance procedures, a maintenance schedule, and a lubrication
schedule. Improper maintenance will void your warranty.
IF YOU HAVE ANY QUESTIONS CONTACT:
LANDOLL CORPORATION
1900 NORTH STREET
MARYSVILLE, KANSAS 66508
PHONE # [phone] or [phone]
OR
FAX # [phone]
CHAPTER 5 Is a troubleshooting guide to aid in diagnosing and solving problems with the trailer.
PARTS MANUAL Is a separate manual showing the various assemblies, sub-assemblies, and systems.
Refer to that manual when ordering Landoll replacement parts. Order parts from your
Landoll dealer.
WARRANTY The Warranty Registration form is included with the product documents. Fill it out and
mail it within 15 days of purchase.
NOTE: IMPROPER ASSEMBLY, MODIFICATION, OR MAINTENANCE OF YOUR
LANDOLL MACHINE CAN VOID YOUR WARRANTY.
COMMENTS Address comments or questions regarding this publication to:
LANDOLL CORPORATION
1900 NORTH STREET
MARYSVILLE, KANSAS 66508
ATTENTION: PUBLICATIONS - DEPT. 55

1-2 F-844-0117
INTRODUCTION AND SAFETY INFORMATION
Understanding Safety
Statements
You will find various types of safety information on the
following pages and on the machine signs (decals)
attached to the vehicle. This section explains their
meaning.
The Safety Alert Symbol means ATTENTION! YOUR
SAFETY IS INVOLVED!
DANGER
WARNING
CAUTION
NOTE
Means that failure to follow these instructions could
cause damage to the equipment or cause it to operate
improperly.
NOTE
Make sure you read and understand the information
contained in this manual and on the machine signs
(decals) before you attempt to operate or maintain this
vehicle.
The safety statements contained in this manual relate to
the operation of the Model 825E/835E/845E HD.
Danger means a life-threatening situation exists.
Death can occur if safety measures or
instructions on this label are not properly
followed.
Warning means serious injury or death can occur
if safety measures or instructions on this label
are not properly followed.
Caution means serious equipment or other
property damage can occur if instructions on this
label are not properly followed.

2-1
Chapter 2
Standard Specifications
MODEL 825E/835E/845E
CAPACITY
MODEL 825E 55,000 LB. Distributed
55,000 LB. Concentrated in 16’
MODEL 835E 70,000 LB. Distributed
60,000 LB. Concentrated in 12’
MODEL 845E 90,000 LB. Distributed
90,000 LB. Concentrated in 16’
*PULLOUT EXTENSION MAXIMUM CAPACITY IS ONE HALF FRAME CAPACITY LISTED ABOVE*
GENERAL SPECIFICATIONS - ALL MODELS
GOOSENECK 12’-0“ Hydraulic Tilt (STD.)
KING PIN SETTING 15”
TIRE SIZE 255/70R22.5 LRH Double Coin
BRAKE SIZE 16-1/2” x 7”
ELECTRICAL HOOKUP 7-Way Connector
AIR HOOKUP Color Coded Gland Hands
LOAD GROUND CLEARANCE 7”
LOADED DECK HEIGHT
MODEL 825E 17”
MODEL 835E 18-1/4”
MODEL 845E 19-3/4”

2-2 F-916-0217 Edition
STANDARD SPECIFICATIONS
HYDRUALIC HOOKUP - ALL MODELS
QUICK COUPLERS Flat Face, 3/4” Body Size
MAXIMUM OPERATING PRESSURE 2500 PSI
OPERATING FLOW 20 GPM Recommended; 50 GPM Max
(Flow control limits functions to 20 GPM)
SPECIFIC BOLT TORQUES
AIR RIDE SUSPENSION
EQUALIZER BEAM PIVOT AND ADAPTER BOLTS-
DESIGNATED W/ NEWAY ON BOLTHEAD 800 FT. LBS.
EQUALIZER BEAM PIVOT AND ADAPTER BOLTS-
DESIGNATED W/ HOLLAND NEWAY ON BOLTHEAD 550 FT. LBS.
SHOCK ABSORBER MOUNTING 150 FT. LBS.
AIR SPRING MOUNTING
1/2” 35 FT. LBS
3/4” 35 FT. LBS
WHEEL FASTENERS
OUTER SPINDLE NUTS 250 - 400 FT. LBS.
PILOT WHEEL NUTS 450 - 500 FT. LBS.
NOTE: Capacity ratings are frame capacities only. Actual load capacities may be restricted by factors such as gross
axle weight ratings (GAWR) or state and federal regulations. Tires, brakes, axles, or wheels may also limit capacity.
NOTE: Tractor hydraulic power supply must be capable of operating at this pressure and flow rate and be equipped
with a pressure relief valve set at this pressure.

STANDARD SPECIFICATIONS
2-3
General Torque Specifications
(rev. 4/97)
Table 2-1: General Torque Specifications
TORQUE SPECIFIED IN FOOT POUNDS - This chart provides tightening torques for general purpose applications when
special torques are not specified on process or drawing. Assembly torques apply to plated nuts and capscrews assembled without
supplemental lubrication (as received condition). They do not apply if special graphite moly-disulfide or other extreme pressure
lubricants are used. When fasteners are dry (solvent cleaned) add 33% to as received condition torque. Bolt head identification
marks indicate grade and may vary from manufacturer to manufacturer. Thick nuts must be used on grade 8 capscrews. Use value
in [ ] if using prevailing torque nuts.
UNC
SIZE
SAE Grade
2
SAE Grade
5
SAE Grade
8
UNF
SIZE
SAE Grade
2
SAE Grade
5
SAE Grade
8
1/4-20 4 [5] 6 [7] 9 [11] 1/4-28 5 [6] 7 [9] 10 [12]
5/16-18 8 [10] 13 [13] 18 [22] 5/16-24 9 [11] 14 [17] 20 [25]
3/8-16 15 [19] 23 [29] 35 [42] 3/8-24 17 [21] 25 [31] 35 [44]
7/16-14 24 [30] 35 [43] 55 [62] 7/16-20 27 [34] 40 [50] 60 [75]
1/2-13 35 [43] 55 [62] 80 [100] 1/2-20 40 [50] 65 [81] 90 [112]
9/16-12 55 [62] 80 [100] 110 [137] 9/16-18 60 [75] 90 [112] 130 [162]
5/8-11 75 [94] 110 [137] 170 [212] 5/8-18 85 [106] 130 [162] 180 [225]
3/4/10 130 [162] 200 [250] 280 [350] 3/4-16 150 [188] 220 [275] 320 [400]
7/8-9 125 [156] 320 [400] 460 [575] 7/8-14 140 [175] 360 [450] 500 [625]
1-8 190 [237] 408 [506] 680 [850] 1-14 210 [263] 540 [675] 760 [950]
1-1/8-7 270 [337] 600 [750] 960 [1200] 1-1/8-12 300 [375] 660 [825] 1080 [1350]
1-1/4-7 380 [475] 840 [1050] 1426 [1782] 1-1/4-12 420 [525] 920 [1150] 1500 [1875]
1-3/8-6 490 [612] 1010 [1375] 1780 [2225] 1-3/8-12 560 [700] 1260 [1575] 2010 [2512]
1-1/2-6 650 [812] 1460 [1825] 2360 [2950] 1-1/2-12 730 [912] 1640 [2050] 2660 [3325]
1-3/4-5 736 [920] 1651 [2063] 2678 [3347] 1-3/4-12 920 [1150] 2063 [2579] 3347 [4183]
METRIC:
Coarse thread metric class 10.9 fasteners and class 10.0 nuts and through hardened flat washers, phosphate coated, Rockwell “C”
38-45. Use value in [ ] if using prevailing torque nuts.
Nominal
thread
diameter (mm)
Newton Meters
(Standard
Torque)
Foot Pounds
(Standard
Torque)
Nominal
Thread
Diameter (mm)
Newton Meters
(Standard
Torque)
Foot Pounds
(Standard
Torque
6 10 [14] 7 [10] 20 385 [450] 290 [335]
7 16 [22] 12 [16] 24 670 [775] 500 [625]
8 23 [32] 17 [24] 27 980 [1105] 730 [825]
10 46 [60] 34 [47] 30 1330 [1470] 990 [1090]
12 80 [125] 60 [75] 33 1790 [1950] 1340 [1450]
14 125 [155] 90 [115] 36 2325 [2515] 1730 [1870]
16 200 [240] 150 [180] 39 3010 [3210] 2240 [2380]
18 275 [330] 205 [245] ----- ----- -----

2-4 F-916-0217 Edition
STANDARD SPECIFICATIONS
Hydraulic Fitting Torque
Specifications
Table 2-2: Hydraulic Fitting Torque Specifications
TORQUE IS SPECIFIED IN FOOT POUNDS- 37oJIC, ORS, & ORB (REV. 10/97)
This chart provides tightening torques for general purpose applications when special torques are not specified on process or
drawing. Assembly torques apply to plated nuts and capscrews assembled without supplemental lubrication (as received condition).
They do not apply if special graphite moly-disulfide or other extreme pressure lubricants are used. When fasteners are dry (solvent
cleaned) add 33% to as received condition torque. Bolt head identification marks indicate grade and may vary from manufacturer to
manufacturer. Thick nuts must be used on grade 8 capscrews. Use value in [ ] if using prevailing torque nuts.
Parker Brand Fittings
Dash Size 37 Degree JIC O-Ring (ORS) O-Ring Boss (ORB)
-4 11-13 15-17 13-15
-5 14-16 ----- 21-23
-6 20-22 34-36 25-29
-8 43-47 58-62 40-44
-10 55-65 100-110 58-62
-12 80-90 134-146 75-85
-16 115-125 202-218 109-121
-20 160-180 248 -272 213-237
-24 185-215 303-327 238-262
-32 250-290 ----- 310-340
Gates Brand Fittings
Dash Size 37 Degree JIC O-Ring (ORS) O-Ring Boss (ORB)
-4 10-11 10-12 14-16
-5 13-15 ----- -----
-6 17-19 18-20 24-26
-8 34-38 32-40 37-44
-10 50-56 46-56 50-60
-12 70-78 65-80 75-83
-14 ----- 65-80 -----
-16 94-104 92-105 111-125
-20 124-138 125-140 133-152
-24 156-173 150-180 156-184
-32 219-243 ----- -----
Aeroquip Brand Fittings
Dash Size 37 Degree JIC O-Ring (ORS) O-Ring Boss (ORB)
-4 11-12 10-12 14-16
-5 15-16 ----- 16-20
-6 18-20 18-20 24-26
-8 38-42 32-35 50-60
-10 57-62 46-50 75-80
-12 79-87 65-70 125-135
-14 ----- ----- 160-180
-16 108-113 92-100 200-220
-20 127-133 125-140 210-280
-24 158-167 150-165 270-360
-32 245-258 ----- -----

3-1
Chapter 3
Operating Instructions
General
This section supplies information for operation of the
semitrailer. It describes and locates controls and gives
general operation procedures. Read all instructions,
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 semitrailer parts.
WARNING
WARNING
Parking Brake
The parking brakes are automatically applied by spring
pressure with the air actuators of the braking system
when air pressure in the emergency line drops below 50
psi. This may be done within the truck using the trailer
parking/emergency valve or by disconnecting the
emergency gladhands.
Air Brake System
The air brake system of the semitrailer is operated from
the towing vehicle after coupling. The towing vehicle’s air
system must be coupled to the semitrailer and charged to
90 psi minimum before the brakes can adequately
function.
Anti-Lock Brake System (ABS)
The Anti-Lock Brake System of the semitrailer is constant
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
semitrailer is moving forward. If a fault exists in the ABS,
normal braking will occur, but the wheels may lock.
Service the ABS as soon as possible.
CAUTION
CAUTION
DO NOT operate the semitrailer with any known
fault that might endanger the occupants, nearby
workers, other traffic, the load, or the equipment.
DO NOT operate the semitrailer until you have
read the operator’s manual and completely
understand the proper use and function of all
controls. Improper use can cause personal injury,
damage to your semitrailer and cargo, and cause
time-consuming breakdowns.
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.
If a fault exists in the semitrailer ABS, normal
braking will occur, but wheels may lock. Service
the ABS as soon as possible.

3-2 F-844-0117
OPERATING INSTRUCTIONS
Figure 3-1: Trailer Terminology
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OPERATING INSTRUCTIONS
3-3
Electrical
The only electrical operation required of the operator is
interconnection of the towing vehicle electrical cable plug
with the semitrailer electrical receptacle.
It is necessary that the tractor blue wire be connected to
the appropriate electrical source on the tractor.
Figure 3-2: 7-pin Connector
Hydraulic
Controls are located on the driver’s side of the trailer. A
hydraulic pump must be coupled to the trailer hydraulic
system before any hydraulic controls can function. The
hydraulic system is designed to operate at 2500 psi
maximum pressure and approximately 20 GPM flow
capacity.
The control valve has a built-in flow control that can
handle 50 GPM max and it limits the function to 20 GPM.
Tractor must be equipped with a relief valve set at
2500 psi maximum pressure.
Pre-Coupling of Semitrailer
and Tractor
1. Slowly back the tractor/truck (towing vehicle) up to
the front end of the semitrailer so the kingpin of the
semitrailer is centered between the tractor fifth wheel
jaws. Stop the towing vehicle just inches ahead of the
semitrailer. Set tractor parking brake.
2. Check the semitrailer king pin plate. It should be in a
horizontal position. The king pin plate should be the
same height, to slightly lower, than the latch area of
the fifth wheel plate of the towing vehicle. If
necessary, connect the tractor hydraulic lines, or start
the semitrailer hydraulic power engine. Use the
TRAILER LIFT lever to raise or lower the kingpin
plate sufficiently to set proper coupling height (See
“Pull Out Extensions” on page 3-9.) Drain all air
and moisture from the towing vehicle air brake
system following towing vehicle manufacturer’s
instructions.
3. Connect the service and emergency air hoses of the
towing vehicle to their respective gladhand on the
front of the semitrailer; red emergency line to the
gladhand with the “EMERGENCY” tag, and the blue
service line to the gladhand with the “SERVICE” tag
(See Figure 3-2.) Chock the semitrailer wheels
before activating the semitrailer air supply valve in
the towing vehicle. Set the parking brakes.
WARNING
4. Check the air brake operations of the semitrailer as
follows:
a. Apply brakes and inspect brake action on all
wheels for prompt application.
b. Release brakes. All brakes should release
immediately. Air pressure should discharge
quickly from the relay emergency valve.
c. Disconnect the emergency air line from the
semitrailer gladhand. Trailer brakes should
promptly set.
d. Re-connect the emergency air line to the
semitrailer and activate the semitrailer air supply
valve. The semitrailer brakes should set.
Figure 3-3: Service Hookups
7-PIN CONNECTOR
WIRE DIAGRAM
BLUE
B
AUX
CLEARANCE
LEFT TURN
LACK
W
GROUND
TAIL LTS
RIGHT TURN
STOP LTS
HITE
BROWN
GREEN
RED
YELLOW
Failure to chock semitrailer wheels could allow
movement of the semitrailer resulting in serious
personal injury, death, or damage to property in
its path.
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3-4 F-844-0117
OPERATING INSTRUCTIONS
Coupling of the Tractor to the
Semitrailer
DANGER
1. Verify the semitrailer wheels are chocked and brakes
function properly.
2. Make certain the coupler of the towing vehicle’s fifth
wheel is open by pulling the latch handle.
3. Slowly back the towing vehicle so its fifth wheel
contacts the front of the king pin plate on the
semitrailer and slips under it. Continue backing until
the fifth wheel coupler locks onto the semitrailer
kingpin.
4. Verify the vehicle coupling is secure by attempting to
pull the tractor forward a few inches. If the tractor
disconnects from the semitrailer, locate source of
coupling failure; repair before continuing; and repeat
steps 3 and 4.
5. Check that the towing vehicle couples securely to the
semitrailer before setting towing vehicle and
semitrailer parking brakes.
IMPORTANT
Keep brakes engaged for remainder of hookup,
checkout procedures, and parking
Connecting Tractor Services to
the Semitrailer
1. Connect the towing vehicle 7-pole electrical plug to
the electrical receptacle on the front of the semitrailer
(See Figure 3-2.)
IMPORTANT
The key on the plug and the keyway in the socket
must be properly aligned before inserting the plug
into the semitrailer socket.
CAUTION
2. If you have not already done so, connect the tractor
hydraulic lines to the semitrailer.
IMPORTANT
Some oil may need to be removed from the tractor
reservoir to allow room for 5.5 gallons of additional
oil displaced from the trailer hydraulic system.
3. Air Lines (See “Pre-Coupling of Semitrailer and
Tractor” on page 3-3.)
Keep all personnel clear of front, rear, and sides
of towing vehicle and semitrailer during coupling,
component operations, and uncoupling. Failure
to stay clear can result in serious personal injury
or death.
Hydraulic operating pressures greater than 2500
psi can cause damage to the trailer.

OPERATING INSTRUCTIONS
3-5
Tractor and Semitrailer
Check-Out
WARNING
CAUTION
1. Activate the hydraulic power source.
2. Using the TRAILER LIFT lever, lift the trailer up until
the load blocks can be lowered into position (See
Figure 3-1 and Table 3-1.)
3. Activate the TRAILER LIFT lever “DOWN” until the
semitrailer rests completely on the load blocks (See
Figure 3-1 and Table 3-1.)
4. Check the operation of all lights and signals on the
semitrailer for proper response to switch positions
(stop, right turn, left turn, and clearance.) Check
operation of remote function if present.
5. Check tire inflation, adjust as needed to the pressure
listed on the semitrailer VIN plate, located on the
front of the semitrailer.
6. Check tractor/semitrailer for air leaks. If air leakage is
found, repair the defect before transporting.
7. Check the oil in each hub for proper level and
freedom from contamination. If hubs are
contaminated with water, dirt or some other foreign
material, clean before transporting.
8. Check tractor air pressure. Pressure must not fall
below 90 psi, even after activating brakes a couple of
times. Set parking brake and carefully remove all
wheel chocks. Set emergency brake and try pulling
forward. The semitrailer wheels must not rotate. If
semitrailer brakes do not apply, DO NOT transport
until defect, or defects, are repaired.
Failure to properly set and check parking brake,
and chock wheels when parking and during
storage, could allow movement of the
truck/semitrailer rig resulting in serious personal
injury, death, or damage to property in its path.
Failure to support the semitrailer fully on the load
blocks during transport, may result in damage to
the load, the semitrailer, and possible serious
injury or death to individuals near the semitrailer.

3-6 F-844-0117
OPERATING INSTRUCTIONS
Towing the Semitrailer
Driving the towing vehicle with the semitrailer coupled
behind requires constant attention to the overall length of
the combination. The “hinged-in-the-middle”
configuration of the tractor and semitrailer, load, and
weight effect performance. Turning, passing,
acceleration, braking, stopping, and backup require
special considerations. When executing steep grades or
turning tight curves, the semitrailer must not be allowed
to push the towing vehicle, or jack knifing the semitrailer
with the towing vehicle may result. Application of the
semitrailer brakes to keep the semitrailer in tow will help
prevent this pushing. Braking should begin before
descending a hill or attempting a curve, to assure control.
CAUTION
1. Make a moving test of the semitrailer brakes at low,
and medium speeds before traveling at highway
speed.
a. The Anti-Lock Brake System (ABS) warning
lamp mounted at left rear side of the semitrailer
should come on when power is supplied to the
ABS by turning the tractor keyswitch on. The
warning lamp should go off once the semitrailer
exceeds 4 mph. If the warning lamp does not go
off, a fault exists in the semitrailer ABS. Once the
vehicle speed exceeds 4 mph, the light should
remain off unless a fault occurs or the keyswitch
is turned off, then on again.
CAUTION
2. Monitor the air pressure gauge on the dash of the
towing vehicle. Pressure should not fall below 90 psi
at any time.
3. The semitrailer wheels track to the inside of the
towing vehicle during turns. Thus, turning corners
requires a wide swing to prevent “curb hopping”, and
to allow the semitrailer wheels to clear any obstacle
on the inside of the corner.
4. To stop, use a gradual and smooth application of
brakes. If grabbing occurs, apply less pressure -
grabbing brakes are not efficient.
WARNING
5. Backing should be done with care. Tail overhang,
semitrailer length, and allowable space must be
taken into consideration when backing the
semitrailer.
When operating semitrailer, DO NOT back over
curb. This will cause severe damage to
undercarriage.
If a fault exists in the semitrailer ABS, normal
braking will occur, but wheels may lock. Service
the ABS as soon as possible.
Always check behind and under the truck and
semitrailer for persons or objects before moving.
Failure to check can lead to serious personal
injury or death to others, or damage to property.

OPERATING INSTRUCTIONS
3-7
Parking the Trailer
1. Position truck/semitrailer rig on a level, solid surface.
2. Set the PARKING BRAKE,not the semitrailer
hand brake, and check for proper brake holding.
3. Chock wheels of semitrailer.
4. Check for any air leaks in lines, relay valve, brake
pods, or any other air system component.
WARNING
Uncoupling Towing Vehicle
from Semitrailer
1. Park the semitrailer according to instructions in
“Parking the Trailer” on page 3-7.
2. Disconnect the emergency and service air lines and
attach them to the tractor gladhand holders. If
present, install dummy gladhands on trailer
couplings.
3. Disconnect the 7-pole cable and hydraulic lines from
the semitrailer and store with the tractor.
4. Pull the tractor fifth wheel plate latch release lever.
5. Attempt to pull the tractor forward. If the tractor
uncouples, verify all service lines are disconnected
and semitrailer wheels are chocked. If tractor does
not disconnect, repeat steps 4 and 5.
6. Pull the tractor away from the semitrailer.
DANGER
Trailer Lift Lever
The TRAILER LIFT lever is located on the driver’s side
of the gooseneck assembly (See Figures 3-1 and 3-3.) It
is the middle lever and has three positions:
Table 3-1: Trailer Tilt Lever
When leaving the semitrailer unattended,
position all hydraulic controls to the neutral or
“OFF” position or disconnect the tractor
hydraulic hook-up.
Always check behind and under the truck and
semitrailer for persons or objects before moving.
Failure to check can lead to serious personal
injury or death to others, or damage to property.
TRAILER LIFT LEVER
UP
This position raises the semitrailer
deck, allowing the load blocks to be
lowered into transport position.
CENTER This is the neutral position. The
semitrailer stays in its current position.
DOWN
This position lowers the semitrailer
deck to the ground, allowing the
detachment of the gooseneck or
allowing the weight of the semitrailer
deck and load to rest on the load
blocks. Also, this lowers the gooseneck
lift arms, permitting the transport of the
detached gooseneck.

3-8 F-844-0117
OPERATING INSTRUCTIONS
Figure 3-4: Hydraulic Controls
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