Landoll 341 User manual

MODEL 341
SEMITRAILER
OPERATOR’S MANUAL
1900 North Street
Marysville, KS 66508
[phone]
F-376-0604 06/04

MODEL 341
SEMITRAILER
OPERATOR’S MANUAL
PURCHASED FROM: DATE / /
ADDRESS:
PHONE NO.: SERIAL NO.:
i

ii
REPORTING SAFETY DEFECTS
If you believe that your vehicle has a defect which could cause a crash or could
cause injury or death, you should immediately inform the National Highway Traffic
Safety Administration (NHTSA) in addition to notifying Landoll Manufacturing.
If NHTSA receives similar complaints, it may open an investigation, and if it
finds that a safety defect exists in a group of vehicles, it may order a recall and
remedy campaign. However, NHTSA cannot become involved in individual prob-
lems between you, your dealer, or Landoll Manufacturing.
To contact NHTSA, you may either call the Auto Safety Hotline toll-free at 1-
800-424-9393 (or 366-0123 in Washington, D.C. area) or write to: NHTSA, U.S. De-
partment of Transportation, Washington, D.C. 20590. You can also obtain other in-
formation about motor vehicle safety from the Hotline.
In the event of a defect or problem with your LANDOLL equipment, please notify
LANDOLL CORPORATION:
LANDOLL CORPORATION
SALES AND SERVICE
1900 NORTH STREET
MARYSVILLE, KANSAS 66508
OR PHONE:
1-800-HAULOLL
(1-800-428-5655)
FAX NO.: [phone]
FOR REPLACEMENT PARTS:
[phone]
1-800-423-4320
FAX NO.: [phone]

iii
TABLE OF CONTENTS
SECTION NO. DESCRIPTION PAGE NO.
1 INTRODUCTION .......................................1-1
2 STANDARD SPECIFICATIONS.............................2-1
3 OPERATING INSTRUCTIONS..............................3-1
3-1 PRE-COUPLING OF SEMITRAILER AND TRUCK ..............3-2
3-2 COUPLING OF THE TRUCK TO THE SEMITRAILER ...........3-3
3-3 CONNECTING TRUCK SERVICES TO THE SEMITRAILER .......3-4
3-4 TRUCK AND SEMITRAILER CHECK-OUT ....................3-5
3-5 TOWING THE SEMITRAILER .............................3-6
3-6 PARKING THE SEMITRAILER ............................3-7
3-7 UNCOUPLING TRUCK FROM SEMITRAILER .................3-7
3-8 TRAILER TILT LEVER ..................................3-8
3-9 AXLE CONTROL LEVER ................................3-8
3-10 WINCH CONTROLS....................................3-8
3-11 GENERAL LOADING PROCEDURE ........................3-9
3-12 LOADING PROCEDURE FOR 20’ CONTAINERS .............3-11
3-13 LOADING PROCEDURE FOR 40’ CONTAINERS .............3-13
3-14 GENERAL UNLOADING PROCEDURE.....................3-14
3-15 UNLOADING PROCEDURE FOR 20’ AND 40’ CONTAINERS ....3-16
3-16 AUXILIARY HYDRAULIC POWER ENGINE OPERATION .......3-17
3-17 REAR IMPACT GUARD SYSTEM .........................3-19
3-18 BLEEDING AND ADJUSTING THE BRAKES ................3-20
3-19 INSTALLATION AND ADJUSTMENT OF ELECTRONIC
BRAKE CONTROL....................................3-21
3-20 RADIO REMOTE CONTROL OPERATION ..................3-24
3-21 COLD WEATHER OPERATION ..........................3-25
3-22 HOT WEATHER OPERATION ...........................3-25
4 MAINTENANCE AND LUBRICATION ........................4-1
4-1 MAINTENANCE SCHEDULE .............................4-1
4-2 MAINTENANCE PROCEDURES ...........................4-5
4-3 HITCH, FRAME, AND DECK .............................4-9
4-4 HYDRAULIC SYSTEM ..................................4-9
4-5 ELECTRICAL SYSTEM .................................4-9
4-6 SUSPENSION MAINTENANCE...........................4-10
4-7 ALIGNMENT ........................................4-10
4-8 ELECTRIC/HYDRAULIC BRAKE SYSTEM MAINTENANCE......4-12
4-9 HUB AND DRUM MAINTENANCE ........................4-13
4-10 WHEEL BEARING LUBRICATION AND ADJUSTMENT.........4-15
4-11 TIRE MAINTENANCE..................................4-16
4-12 HYDRAULIC ENGINE PACKAGE .........................4-18
5 TROUBLESHOOTING GUIDE..............................5-1

iv
SAFETY PRECAUTIONS
THIS IS THE SAFETY ALERT SYMBOL. IT IS USED TO ALERT YOU
TO POTENTIAL INJURY HAZARDS. OBEY ALL SAFETY MESSAGES
THAT FOLLOW THIS SYMBOL TO AVOID POSSIBLE INJURY OR
DEATH.
DANGER DANGER INDICATES AN IMMINENTLY HAZARDOUS SITUA-
TION WHICH, IF NOT AVOIDED, WILL RESULT IN DEATH OR
SERIOUS INJURY.
WARNING WARNING INDICATES A POTENTIALLY HAZARDOUS SITUA-
TION WHICH, IF NOT AVOIDED, COULD RESULT IN DEATH
OR SERIOUS INJURY.
CAUTION CAUTION INDICATES A POTENTIALLY HAZARDOUS SITUA-
TION WHICH, IF NOT AVOIDED, MAY RESULT IN MINOR OR
MODERATE INJURY.
CAUTION CAUTION USED WITHOUT THE SAFETY ALERT SYMBOL INDI-
CATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF
NOT AVOIDED, MAY RESULT IN PROPERTY DAMAGE.

1INTRODUCTION
This manual provides operating, servicing, and maintenance instructions, with detailed parts lists for
Model 341 semitrailer, manufactured by Landoll Corporation, Marysville, Kansas 66508.
SECTION 1 gives basic instructions on the use of this manual.
SECTION 2 gives specifications for the semitrailer, 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.
SECTION 3 gives instructions for the proper operation of the equipment.
SECTION 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
or phone:
[phone] or
[phone]
or FAX:
[phone]
SECTION 5 is a troubleshooting guide to aid in diagnosing and solving problems with the
semitrailer.
PARTS LIST is a separate manual showing the various assemblies, subassemblies, and sys-
tems. Refer to that manual when ordering Landoll replacement parts. Order parts
from your Landoll dealer.
WARRANTY The Warranty Registration form is located with the product documents. Fill it out
and mail it within 15 days of purchase. The Warranty is printed inside the front
cover.
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: PUBLISHING -DEPT. 55
1-1

2STANDARD SPECIFICATIONS
CAPACITY*:
SINGLE AXLE ......................................15,000 LB. DISTR. - 5,000 LB. in 10 FT.
KING PIN SETTING (FROM FRONT OF ALUMINUM BED): ................................12”
KING PIN SETTING (FROM WINCH SUPPORT): ........................................42”
UNDERCARRIAGE TRAVEL: .....................................................11’-6”
STANDARD LOAD ANGLE: ........................................................12°
HYDRAULIC HOOKUP:
QUICK COUPLERS .................................... FLAT FACE 3/4" BODY SIZE
MAXIMUM OPERATING PRESSURE .......................................2500 PSI
OPERATING FLOW ....................................................17GPM
ELECTRICAL HOOKUP: ............................................7-WAY CONNECTOR
SPECIFIC BOLT TORQUES
FOR SPRING SUSPENSION:
AXLE CLAMP U-BOLTS ............................................ 300FT.-LBS.
TORQUE ARM BOLT ...............................................250FT.-LBS.
TORQUE ARM CLAMP NUTS ..........................................60FT.-LBS.
WHEEL FASTENERS - ALL MODELS:
OUTER SPINDLE NUTS ..........................................250-400 FT.-LBS.
PILOT WHEEL NUTS ............................................450-500 FT.-LBS.
* CAPACITY RATINGS ARE FRAME CAPACITIES ONLY. ACTUAL LOAD CAPACITIES MAY BE RE-
STRICTED BY FACTORS SUCH AS GROSS AXLE WEIGHT RATINGS (GAWR) OR STATE AND FED-
ERAL REGULATIONS.
2-1

2-2
LANDOLL CORPORATION
GENERAL TORQUE SPECIFICATIONS (REV. 4/97)
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.
TORQUE IS SPECIFIED IN FOOT POUNDS
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 [16] 18 [22] 5/16-24 9 [11] 14 [17] 20 [25]
3/8-16 15 [19] 23 [29] 35 [43] 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] 110 [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]
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
Standard Torque Nominal
Thread
Diameter
mm
Standard Torque
Newton-
Meters Foot- Pounds Newton- Meters Foot- Pounds
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 [101] 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]
Table 2-1 General Torque Specifications

2-3
LANDOLL CORPORATION
HYDRAULIC FITTING TORQUE SPECIFICATIONS
37oJIC, ORS, & ORB (REV. 10/97)
THIS CHART PROVIDES TIGHTENING TORQUES FOR HYDRAULIC FITTING APPLICATIONS WHEN SPECIAL TORQUES ARE NOT SPECIFIED
ON PROCESS OR DRAWING.
ASSEMBLY TORQUES APPLY TO PLATED CARBON STEEL AND STAINLESS STEEL FITTINGS ASSEMBLED WITHOUT SUPPLEMENTAL
LUBRICATION (AS RECEIVED CONDITION).THEY DO NOT APPLY IF SPECIAL GRAPHITE MOLY-DISULFIDE OR OTHER EXTREME PRESSURE
LUBRICANTS ARE USED.
BRASS FITTINGS AND ADAPTERS - 65% OF THE TORQUE VALUE FOR STEEL. STAINLESS STEEL, ALUMINUM AND MONEL - THREADS ARE
TO BE LUBRICATED.
TORQUE IS SPECIFIED IN FOOT POUNDS
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 57.5-62.5
-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
LANDOLL CORPORATION
HYDRAULIC FITTING TORQUE SPECIFICATIONS
37oJIC, ORS & ORB (REV. 10/97)
THIS CHART PROVIDES TIGHTENING TORQUES FOR HYDRAULIC FITTING APPLICATIONS WHEN SPECIAL TORQUES ARE NOT SPECIFIED
ON PROCESS OR DRAWING.
ASSEMBLY TORQUES APPLY TO PLATED CARBON STEEL AND STAINLESS STEEL FITTINGS ASSEMBLED WITHOUT SUPPLEMENTAL
LUBRICATION (AS RECEIVED CONDITION).THEY DO NOT APPLY IF SPECIAL GRAPHITE MOLY-DISULFIDE OR OTHER EXTREME PRESSURE
LUBRICANTS ARE USED.
BRASS FITTINGS AND ADAPTERS - 65% OF THE TORQUE VALUE FOR STEEL.
TORQUE IS SPECIFIED IN FOOT POUNDS.
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 — 18-20
-6 18-20 18-20 24-26
-8 38-42 32-35 50-60
-10 57-62 46-50 72-80
-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 — —
Table 2-2 Hydraulic Fitting Torque Specifications

3OPERATING INSTRUCTIONS
This section supplies information for operation
of the trailer. It describes and locates controls and
gives general operation procedures. Read all in-
structions, warnings, cautions and danger notes
before attempting to operate the trailer. Operators
must have proper training before operating the
semitrailer.
A hydraulic pump must be coupled to the
trailer hydraulic system, or the optional hydraulic
engine package started, before using hydraulic
controls.
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
UNDERSTAND 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.
WARNING
INSPECT ALL TRAILER COMPONENTS
INCLUDING THE WINCH AND WINCH
CABLE FOR ANY CRACKS, BROKEN
PARTS OR DEFECTS. REPAIR OR RE-
PLACE BAD PARTS BEFORE OPERAT-
ING TRAILER. FAILURE TO DO SO CAN
RESULT IN SERIOUS PERSONAL IN-
JURY OR DEATH.
3-0.1 Electric/Hydraulic Brake System
The electric/hydraulic brake system of the
trailer is operated from the towing vehicle after
coupling.
The electric/hydraulic brake system requires 12
volt power to the red terminal. It should be 10
gauge wire with a 30 amp circuit breaker to protect
it. The blue terminal should be controlled by an
electronic brake controller that is approved for
working with the electric/hydraulic brake unit. Ac-
ceptable controllers include the Carlisle “HSC”, Te-
konsha “Voyager” 9030 and 9035, Envoy 9040,
Dexter “Predator”, and Draw-tite “Activator II and
III”. The black terminal is used to charge the
break-a-way battery on the trailer.
CAUTION
1. DISCONNECT TRAILER PLUG FROM
THE TOW VEHICLE PRIOR TO TEST-
ING A BREAK-A-WAY SWITCH OR YOU
MAY DESTROY THE BRAKE CON-
TROLLER.
2. IN STOP AND GO TRAFFIC, THE
ELECTRIC/HYDRAULIC ACTUATOR
CAN GET QUITE WARM TO THE
TOUCH. THIS IS NORMAL AND
SHOULD NOT BE OF CONCERN. CARE
SHOULD BE TAKEN TO LOCATE THE
UNIT IN AN AREA WHERE YOUR SKIN
WILL NOT COME IN DIRECT CONTACT
WITH THE UNIT.
3. THE ELECTRIC/HYDRAULIC ACTUA-
TOR CONTAINS SENSITIVE ELEC-
TRONICS THAT MUST BE PRO-
TECTED. DRILLING ADDITIONAL
HOLES IN THE ACTUATOR HOUSING
OR WELDING ANYWHERE ON THE
UNIT WILL DAMAGE THE UNIT MAK-
ING IT INOPERABLE AND WILL VOID
THE MANUFACTURER’S WARRANTY.
ALWAYS MAKE SURE TO DISCON-
NECT THE ACTUATOR FROM THE
TRAILER ELECTRICAL SYSTEM BE-
FORE DOING ANY WELDING REPAIR
OR MODIFICATIONS TO THE TRAILER
STRUCTURE.
3-1

WARNING
THE ELECTRIC/HYDRAULIC ACTUA-
TOR AND TRAILER BRAKES ARE IN-
TENDED ONLY TO SUPPLEMENT THE
SERVICE BRAKE SYSTEM ON THE
TOWING VEHICLE. THE ACTUATOR
AND TRAILER BRAKES ARE NOT DE-
SIGNED TO FUNCTION AS A PARK
BRAKE. AT NO TIME SHOULD THE
TOWED VEHICLE BRAKE SYSTEM BE
USED AS THE PRIMARY SOURCE OF
BRAKING FOR THE TOWING VEHICLE.
WARNING
WHEN STOPPED FOR EXTENDED PE-
RIODS (MORE THAN TWO MINUTES),
APPLY THE PARK BRAKE ON THE
TOWING VEHICLE AND RELEASE THE
SERVICE BRAKE PEDAL SO THAT THE
ELECTRIC/HYDRAULIC ACTUATOR
DOES NOT RUN CONTINUOUSLY.
FAILURE TO FOLLOW THIS GUIDE-
LINE WILL CAUSE THE UNIT TO OVER-
HEAT AND WILL DAMAGE THE UNIT.
WARNING
DO NOT ATTEMPT TO TOW THE
TOWED VEHICLE UNLESS THE EMER-
GENCY BREAK-A-WAY BATTERY IS
FULLY CHARGED.
WARNING
ALTHOUGH THE ELECTRIC/HYDRAU-
LIC ACTUATOR IS WEATHER TIGHT, IT
IS NOT DESIGNED TO WITHSTAND
THE DIRECT SPRAY FROM A
POWER/CAR WASH. CARE SHOULD
BE TAKEN TO PROTECT THE UNIT
FROM DIRECT SPRAY WHEN WASH-
ING THE TRAILER.
WARNING
DO NOT LEAVE THE BREAK-A-WAY
SWITCH PULLED FOR MORE THAN
TWO MINUTES. THE ELECTRIC/HY-
DRAULIC UNIT WILL OVERHEAT IF
RAN CONTINUOUSLY FOR MORE
THAN TWO MINUTES.
3-1 PRE-COUPLING OF SEMITRAILER AND TRUCK
3-1.1 Slowly back the truck up to the front end
of the semitrailer so the kingpin of the semi-
trailer is centered between the truck fifth
wheel jaws. Stop the truck several inches
ahead of the semitrailer. Set truck parking
brake.
3-1.2 The king pin plate should be the same
height as the latch area of the fifth wheel
plate of the truck. If necessary, connect the
truck hydraulic lines or start the trailer hy-
draulic power engine. Use the TRAILER
TILT lever (See Figure 3-2) to raise or lower
the kingpin plate sufficiently to allow proper
coupling.
3-1.3 Before coupling any lines to trailer, test
the emergency brakes of trailer by pulling pin
of emergency break-a-way switch. The elec-
tric/hydraulic brake unit should run and apply
brakes. Do not let the brake unit run more
than two minutes or the brake unit will get
hot and damage the unit.
3-1.4 If emergency brakes do not come on,
repair problem before going any further. If
they work, then place pin back in break-a-
way switch.
3-2

3-2 COUPLING OF THE TRUCK TO THE SEMITRAILER
DANGER
KEEP ALL PERSONNEL CLEAR OF
FRONT, REAR, AND SIDES OF TRUCK
AND SEMITRAILER DURING COU-
PLING, COMPONENT OPERATIONS,
AND UNCOUPLING. FAILURE TO STAY
CLEAR CAN RESULT IN SERIOUS
PERSONAL INJURY OR DEATH.
3-2.1 Verify the semitrailer wheels are
chocked.
3-2.2 Make sure the truck‘s fifth wheel coupler
is open.
3-2.3 Slowly back the truck so the fifth wheel
contacts the kingpin plate. Continue backing
until the fifth wheel coupler locks onto the
kingpin.
3-2.4 Try to pull the truck forward a few
inches to verify the vehicle coupling is se-
cure. If the truck disconnects from the semi-
trailer: locate the source of the coupling fail-
ure; repair before continuing; and repeat
Steps 3-2.3 and 3-2.4.
CAUTION
PUSHING SEMITRAILER BACKWARDS
CAN DAMAGE LANDING GEAR.
3-2.5 Check that the truck couples securely to
the semitrailer before setting truck parking
brakes.
IMPORTANT
KEEP TRUCK PARKING BRAKES ENGAGED
FOR REMAINDER OF COUPLING, CHECK-OUT,
AND PARKING.
3-3

3-3 CONNECTING TRUCK SERVICES TO THE SEMITRAILER
3-3.1 Connect the truck 7-way electrical plug
to the electrical receptacle on the front of the
semitrailer (See Figure 3-1).
IMPORTANT
THE KEY ON THE PLUG AND THE KEYWAY IN
THE SOCKET MUST BE PROPERLY ALIGNED
BEFORE INSERTING THE PLUG INTO THE
SEMITRAILER SOCKET.
3-3.2 If you have not already done so, con-
nect the truck hydraulic lines to the semi-
trailer, unless your semitrailer is equipped
with the auxiliary hydraulic power engine
package.
IMPORTANT
SOME OIL MAY NEED TO BE REMOVED FROM
THE TRUCK RESERVOIR TO ALLOW ROOM
FOR 7 GALLONS OF ADDITIONAL OIL DIS-
PLACED FROM THE SEMITRAILER HYDRAULIC
SYSTEM.
3-3.3 Connect the break-a-way switch cable
to a part of the truck so, if the trailer
becomes disconnected from the truck, the
cable will pull the pin of the break-a-way
switch and stop the trailer.
3-4
Figure 3-1 Service Hookups (Front View)

3-4 TRUCK AND SEMITRAILER CHECK-OUT
3-4.1 While hydraulic power is operating, raise
the front end of the semitrailer with the
TRAILER TILT lever (See Figure 3-2) until
weight is off the landing gear. Raise landing
gear. Secure each leg with a park stand re-
taining pin in fully retracted position before
transporting.
WARNING
LANDING GEAR LEGS MUST BE
FULLY RETRACTED AND SECURED
WITH PINS BEFORE OPERATING OR
MOVING SEMITRAILER.
3-4.2 Lower the front end with the TRAILER
TILT lever until the semitrailer is fully low-
ered. Hold lever in the down position until hy-
draulic system works against the bottomed
out hydraulic tilt cylinders.
3-4.3 Verify that the traveling undercarriage is
completely slid back to transport position.
Shut off hydraulic power.
3-4.4 Check the operation of all lights and sig-
nals on the semitrailer for proper response to
switch positions (stop, right turn, left turn and
clearance).
3-4.5 Check that tire inflation matches the
pressure listed on the tire.
3-4.6 Check truck/semitrailer combination for
leaks. If leakage is found, repair the defect
before transporting.
3-4.7 Check that the oil in each hub is at the
proper level and free from contamination. If
hubs contain water, dirt, or other foreign mat-
ter, clean them before transporting.
3-4.8 Set truck parking brake and carefully re-
move all wheel chocks. Depress truck brake
pedal. The brake unit should make a hum-
ming noise. With the brake pedal depressed,
slide the manual slide on the electronic
brake controller over to apply brakes. The
brake unit should apply the trailer brakes.
The brake unit humming noise will change
pitch as the brake unit builds up pressure in
the hydraulic brakes.
3-5
Figure 3-2 Hydraulic Control Levers

3-5 TOWING THE SEMITRAILER
3-5.1 Driving the truck with the semitrailer
coupled behind requires constant attention to
the overall length. Turning, passing, acceler-
ating, braking, stopping, and back-up require
special considerations. When executing
steep grades or turning tight curves, the
semitrailer must not be allowed to push the
truck, or jack knifing may result. Application
of the semitrailer brakes to keep the semi-
trailer in tow will help prevent this situation.
To assure control, brake before descending a
hill or attempting a curve.
3-5.2 Make a moving test of the semitrailer
brakes at low and medium speeds before
traveling at highway speed. The gain setting
on the in-cab electronic controller may have
to be adjusted depending on how much load
is on the trailer. If braking is too severe, ad-
just the gain setting down to decrease pres-
sure. If braking is inadequate, increase the
gain setting to increase pressure. The elec-
tronic controller in normal operation does not
send a signal to apply brakes if the trailer is
not moving because it is inertia activated.
The electronic controller does have a manual
slide knob that will override the normal op-
eration though that can be used to apply the
brakes.
3-5.3 When stopping trailer for more than two
minutes, use truck parking brakes or chock
tires of trailer.
CAUTION
DO NOT APPLY TRAILER BRAKES
FOR MORE THAN TWO MINUTES OR IT
WILL GET THE BRAKE UNIT HOT AND
DAMAGE THE BRAKE UNIT.
CAUTION
WHEN OPERATING TRAILER, DO NOT
BACK OVER CURB. THIS WILL CAUSE
SEVERE DAMAGE TO UNDERCAR-
RIAGE AND UNDERCARRIAGE CYLIN-
DER.
3-5.4 The semitrailer wheels track to the in-
side of the truck 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.
3-5.5 To stop, use a gradual and smooth appli-
cation of brakes. If grabbing occurs, apply less
pressure. Grabbing brakes are not efficient.
DANGER
ALWAYS CHECK BEHIND AND UNDER
THE TRUCK AND SEMITRAILER FOR
PERSONS OR OBJECTS BEFORE
MOVING. FAILURE TO CHECK CAN
LEAD TO SERIOUS PERSONAL IN-
JURY, DEATH, OR DAMAGE TO PROP-
ERTY.
3-5.6 Backing should be done with care. Tail
overhang, semitrailer length, and allowable
space must be taken into consideration.
3-6

3-6 PARKING THE SEMITRAILER
3-6.1 Position truck/trailer rig on a level, solid
surface.
3-6.2 Set the TRUCK PARKING BRAKE and
check for proper brake holding.
3-6.3 Chock wheels.
WARNING
WHEN LEAVING THE SEMITRAILER
UNATTENDED, POSITION ALL HY-
DRAULIC CONTROLS TO THE NEU-
TRAL OR “OFF” POSITION AND SHUT
OFF THE HYDRAULIC ENGINE POWER
SUPPLY, OR DISCONNECT THE
TRUCK HYDRAULIC HOOK-UP.
3-7 UNCOUPLING TRUCK FROM SEMITRAILER
3-7.1 Park the semitrailer according to instruc-
tions in Section 3-6.
3-7.2 Remove retaining pin and lower landing
gear to the ground. Hydraulically raise the
front end of the semitrailer until the next hole
in the landing gear is available. Insert pin
through both inner and outer legs of the
landing gear. Hydraulically lower semitrailer
onto the legs.
WARNING
SECURE EACH LEG WITH PIN BEFORE
LEAVING SEMITRAILER UNAT-
TENDED.
3-7.3 Pull the truck fifth wheel plate latch re-
lease.
3-7.4 Disconnect the 7-way cable and hydrau-
lic lines from the semitrailer and store with
the truck.
3-7.5 Attempt to pull the truck forward. If the
truck uncouples, verify that all service lines
are disconnected and semitrailer wheels are
chocked. If truck does not disconnect, repeat
Sections 3-7.3 and 3-7.5.
3-7.6 Pull the truck away from the semitrailer.
3-7

3-8 TRAILER TILT LEVER
The TRAILER TILT lever is located on the
driver’s side of the semitrailer under the outer
frame beam. (See Figure 3-2) It has three posi-
tions:
UP In this position, the front end of the
semitrailer rises to the load position.
CENTER This is the neutral position. The
semitrailer stays in its current posi-
tion.
DOWN In this position, the front end of the
semitrailer lowers to the transport
position.
3-9 AXLE CONTROL LEVER
The AXLE CONTROL lever (See Figure 3-2)
is the control on the rear with three positions:
UP
In this position, the undercarriage
slides forward for loading.
CENTER This is the neutral position.
DOWN In this position, the undercarriage
slides to the rear. The undercarriage
must be in the rear-most position for
transport.
3-10 WINCH CONTROLS
DANGER
1. THE WINCH IS NOT DESIGNED OR
INTENDED TO BE USED FOR LIFTING
OR MOVING PEOPLE. USING IT THIS
WAY CAN CAUSE SERIOUS INJURY
OR DEATH.
2. MAKE CERTAIN THE WINCH CABLE
SPOOL CLUTCH IS SET TO ENGAGE
AND CLUTCH IS FULLY ENGAGE BE-
FORE LOAD TENSION IS APPLIED TO
WINCH CABLE. NEVER ATTEMPT TO
DISENGAGE THE WINCH CABLE
SPOOL WHEN THE CABLE IS UNDER
TENSION. LOSS OF LOAD CONTROL,
PROPERTY DAMAGE, INJURY OR
DEATH CAN RESULT.
3. FAILURE TO LEAVE AT LEAST FIVE
WINCH CABLE WRAPS ON THE WINCH
CABLE SPOOL COULD ALLOW THE
CABLE TO COME OFF THE SPOOL,
RESULTING IN SERIOUS PERSONAL
INJURY OR DEATH.
3-10.1 The 12,000# WINCH CLUTCH HAN-
DLE (See Figure 3-3) is on the curbside of
the winch assembly. The 12,000 pound
winch clutch handle has two positions that
engage or disengage the winch spool:
DISENGAGE In this position, the winch is disen-
gaged. This allows the spool to
“free-wheel”. This is only used
when there is no load on the
winch cable. This feature allows
the cable to be pulled out fairly fast
and does not require operating the
hydraulic system.
ENGAGE In this position, the winch is en-
gaged. Cable may be “power”
spooled on or off the winch spool.
The winch is now controlled by the
Winch Hydraulic Lever.
3-8