Landoll 855C HD Series User manual

F-669-0113 01/2013
LANDOLL CORPORATION
1900 North Street
Marysville, Kansas 66508
[phone]
800-428-5655 ~ WWW.LANDOLL.COM
Model 855C/855 HD Series
Detachable Semitrailer
Operator’s Manual

F-669-0113 Edition i
Table of Contents
1 Introduction
Understanding Safety Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2 Standard Specifications
3 Operating Instructions
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Air Brake System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Anti-Lock Brake System (ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Nitro Stinger/Nitro Spreader (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Parking the Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Uncoupling Towing Vehicle from Semitrailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Trailer Lift Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Swing Out Outrigger Platform Extension Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
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
Air Ride Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Anti-Lock Brake System (ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Cold Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Hot Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
4 Maintenance and Lubrication

ii F-669-0113 Edition
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Repair Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Gooseneck, Frame, And Deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Repairing Structural Defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Suspension Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Air Ride Height Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Wheel Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
Axle Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Manual Alignment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Air Ride Suspension Axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Brake System Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Spring Air Brake Chambers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Caging the Power Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Emergency Relay Valve Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Brake Assembly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Brake Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Disassembly for 16-1/2” x 7" Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Reassembly for 16-1/2 x 7" Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Automatic Slack Adjuster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Replacing Slack Adjuster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Adjusting Slack Adjuster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Hub and Drum Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Wheel Bearing Lubrication and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Tire Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Tire Inflation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Tire Matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Tape Measuring Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Straight Edge or String Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Mounting Tire and Wheel (Hub Type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
Hydraulic Engine Package (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
5 Troubleshooting Guide
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

F-669-0113 Edition iii
Tires - Wheels - Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Brake Drums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

iv F-669-0113 Edition

1-1
Chapter 1
Introduction
This manual provides operating, servicing, and maintenance instructions for Model 855C/855 HD, manufactured by
Landoll Corporation, Marysville, Kansas 66508.
CHAPTER 1 gives basic instructions on the use of this manual.
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
or 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, subassemblies, 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-669-0113 Edition
INTRODUCTION
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 855C/855 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 855C/855 HD
CAPACITY*: 110,000 LB. DISTRIBUTED
110,000 LB. CONCENTRATED IN 12’
SWING OUT EXTENSION MAXIMUM CAPACITY IS ONE HALF FRAME CAPACITY LISTED ABOVE.
GOOSENECK:
12’-5” DUAL PIN SETTINGS W/ 7 POSITION FIFTH WHEEL RIDE HEIGHT
10’-9” STD ON 855-48CA MODELS
KING PIN SETTING: 10’-9” G/N = 15”; 12’-5” G/N DUAL PINS = 15” AND 33”
SWING CLEARANCE: 10’-9” G/N = 90”; 12’-5” G/N DUAL SWING = 108” AND 90”
LOADED GROUND CLEARANCE: 6-1/2”
LOADED DECK HEIGHT: 19-1/2”
TIRE SIZE: 255/70R22.5 LRH DOUBLE COIN
BRAKE SIZE: 16-1/2” X 7” FULL AIR W/ SPRING BRAKES ON THREE AXLES, ABS 4S/2M
ELECTRICAL HOOKUP: 7-WAY CONNECTOR
AIR HOOKUP: COLOR CODED GLAD HANDS
HYDRAULIC HOOKUP:
QUICK COUPLERS FLAT FACE 3/4” BODY SIZE
MAXIMUM OPERATING
PRESSURE**
2500 PSI
OPERATING FLOW 17 GPM
* 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. TIRE,
BRAKE, AXLE, OR WHEEL SELECTION MAY ALSO LIMIT CAPACITY.
** 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.

2-2 F-669-0113 Edition
STANDARD SPECIFICATIONS
SPECIFIC BOLT TORQUES
AIR RIDE SUSPENSION:
EQUALIZER BEAM PIVOT AND ADAPTER BOLTS
DESIGNATED W/ NEWAY ON BOLT HEAD 800 FT.-LBS.
DESIGNATED W/ HOLLAND NEWAY ON
BOLT HEAD
550 FT.-LBS.
SHOCK ABSORBER MOUNTING 150 FT.-LBS.
AIR SPRING MOUNTING:
1/2” 35 FT.-LBS.
3/4” 35 FT.-LBS.
WHEEL FASTENERS - ALL MODELS:
OUTER SPINDLE NUTS 250 - 400 FT.-LBS.
PILOT WHEEL NUTS 450 - 500 FT.-LBS.

STANDARD SPECIFICATIONS
2-3
Table 2-1: General Torque Specifications
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]
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
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]

2-4 F-669-0113 Edition
STANDARD SPECIFICATIONS
Table 2-2: Hydraulic Fitting Torque Specifications
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
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 — 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 — —

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
Nitro Stinger/Nitro Spreader (Option)
Refer to the Nitro Stinger or Nitro Spreader Operating
Manual from the vendor for operation, maintenance, and
service instructions. If another manual is required, it can
be obtained by requesting Landoll p/n F-699.
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-669-0113 Edition
OPERATING INSTRUCTIONS
Figure 3-1: Trailer Terminology
Figure 3-2: Service Hookups
855 terms
LIFT CYLINDER
FEMALE (RETURN) AND
MALE (PRESSURE)
HYDRAULIC COUPLINGS
HYDRAULIC
CONTROL
OPERATION
INSTRUCTIONS
LIFT ARM
LOAD BLOCK
LOAD CARRIER
CARRIER LOCK
ACCESS COVER
(HYDRAULIC AND
PNEUMATIC
VALVES)
GOOSENECK LOAD
HOOKS, FRAME
RECEIVER HOOK
AIR AND ELECTRICAL
STORAGE COMPARTMENT
FRONT
FLAG
HOLDER
AIR RAISE/LOWER
(STANDARD)
REAR FLAG
HOLDER
SWING OUT
OUTRIGGERS
(OPTION)
ABS LIGHT
REAR BUMPER
AIR RAISE/LOWER
(OPTION)
DIGITAL AIR SCALE
(OPTION)
7 WAY ELECTRICAL
RECEPTACLE
EMERGENCY AIR
GLADHAND
HYDRAULIC HOOKUPS
3/4 QUICK COUPLERS
PRESSURE SIDE
RETURN SIDE
SERVICE AIR
GLADHAND
545-108665

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.
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 17 gpm flow
capacity.
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
“Trailer Lift Lever” on page 3-8.) 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.
Failure to chock semitrailer wheels could allow
movement of the semitrailer resulting in serious
personal injury, death, or damage to property in
its path.

3-4 F-669-0113 Edition
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, the trailer height can
be adjusted (See “Preparation for Loading and
Unloading” on page 3-11.)
3. Before moving the trailer, activate the TRAILER LIFT
lever “DOWN” until the semitrailer load carrier rests
completely on the load blocks (See “Trailer Lift
Lever” on page 3-8.) (See Figure 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-669-0113 Edition
OPERATING INSTRUCTIONS
Figure 3-3: Hydraulic Controls
A
A
VIEW A-A
855c hyd controls

OPERATING INSTRUCTIONS
3-7
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.

3-8 F-669-0113 Edition
OPERATING INSTRUCTIONS
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 3-8.
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 (See Figures 3-1 and 3-3) is
located on the driver’s side of the gooseneck assembly. It
is the middle lever and has three positions:
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.
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.