Landoll 900D Series User manual

F-823-0216 02/2016
LANDOLL CORPORATION
1900 North Street
Marysville, Kansas 66508
[phone]
800-428-5655 ~ WWW.LANDOLL.COM
Model 900D Series
Hydraulic Tail Semitrailer
Operator’s Manual
Eastern Wrecker Sales Inc

Eastern Wrecker Sales Inc

F-823-0216 Edition i
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
Landing Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
Axle/Tail Control Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Air Suspension Dump Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Loading Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Securing the Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Unloading Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Work Light (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-13
Winch Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Free Spool Clutch Operation (Warn Winch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Free Spool Clutch Operation (DP Winch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Free Spool Clutch Operation (Braden) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Dock Leveler Control Operation (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Air Activated Upper Deck Ramp (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Hydraulic Power Supply Engine Operation (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Air Ride Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Bulkhead (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23
Remote Control (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24
Rear Impact Guard System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Anti-Lock Brake System (ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Cold Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
Hot Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28
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ii F-823-0216
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Suspension Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Air Ride Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Air Ride Height Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Wheel Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Axle Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Manual Alignment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Air Ride Suspension Axles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Brake System Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Spring Air Brake Chambers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Caging the Power Spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Emergency Relay Valve Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Brake Assembly Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Brake Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
Disassembly for 12-1/4” X 7-1/2” Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Reassembly for 12-1/4” X 7-1/2” Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
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F-823-0216 Edition iii
Tire Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Tire Inflation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
Tire Matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Tape Measuring Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Straight Edge or String Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Mounting Tire and Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27
Winches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
Crank Landing Gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28
5 Troubleshooting Guide
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Tires - Wheels - Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Brake Drums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Hydraulic Power Supply Engine Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
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1-1
Chapter 1
Introduction and Safety Information
Introduction
This manual provides operating, servicing, and maintenance instructions for Model 930D/950D 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, 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
Eastern Wrecker Sales Inc

1-2 F-823-0216 Edition
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 930D/950D semitrailer.
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.
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Chapter 2
Standard Specifications
MODEL 930D/950D
CAPACITY
MODEL 930D TANDEM AXLE
DECK RATING
HYDRAULIC TAIL RATING
70,000 LB. Distributed
50,000 LB. Distributed
24,000 LB. Distributed
MODEL 950D TRIPLE AXLE
DECK RATING
HYDRAULIC TAIL RATING
100,000 LB. Distributed
70,000 LB. Distributed
24,000 LB. Distributed
GOOSENECK NON-TILTING
KING PIN SETTING 18”
UNDERCARRIAGE TRAVEL 60”
ELECTRICAL HOOKUP 7-Way Connector
AIR HOOKUP Color Coded Gland Hands
HYDRAULIC TAIL
HYDRAULIC TAIL LOAD ANGLE - 12' TAIL 15°
HYDRAULIC TAIL LOAD ANGLE - 14' TAIL 13°
HYDRAULIC TAIL LOAD ANGLE - 15' TAIL 12°
DECK HEIGHT 38”
HYDRAULIC HOOKUP
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)
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2-2 F-823-0216 Edition
STANDARD SPECIFICATIONS
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.
4” AND 5” CAM FOLLOWERS ATTACHED TO UNDERCARRIAGE
GREASED THREADS 250 FT. LBS
DRY THREADS 500 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.
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: Hydraulic tail load angle and deck height based on standard 235/75R17.5 tires.
Eastern Wrecker Sales Inc

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]
Eastern Wrecker Sales Inc

2-4 F-823-0216 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 -------------- --------------
Eastern Wrecker Sales Inc

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
Landing Gear
The landing gear consists of two legs with a tube
telescoping within another tube. Crank style is standard
(See Figure 3-3 for crank handle location.) Pin drop
style is optional.
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 and the
ABS must be serviced as soon as possible.
Eastern Wrecker Sales Inc

3-2 F-823-0216 Edition
OPERATING INSTRUCTIONS
Figure 3-1: Trailer Terminology
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

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
Eastern Wrecker Sales Inc

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
Most controls are located on the driver’s side of the
trailer. A hydraulic pump must be coupled to the trailer
hydraulic system, or the optional hydraulic engine
package started, 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. Crank two
speed landing gear up or down to correct height. If
you have the optional pin drop. Jack the trailer up to
take pressure off parking stand and re-pin into
correct height. Remove jack before connecting.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 3-2: Service Hookups
Failure to chock semitrailer wheels could allow
movement of the semitrailer resulting in serious
personal injury, death, or damage to property in
its path.






󰾾




Eastern Wrecker Sales Inc

3-4 F-823-0216 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.

CAUTION
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 unless your
semitrailer is equipped with the self-contained
hydraulic power engine package.
IMPORTANT
Some oil may need to be removed from the tractor
reservoir to allow room for 2 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.
Pushing the semitrailer backwards can damage
parking stands.
Hydraulic operating pressures greater than 2500
psi can cause damage to the trailer.
Eastern Wrecker Sales Inc

OPERATING INSTRUCTIONS
3-5
Tractor and Semitrailer
Check-Out

WARNING

CAUTION
1. With hydraulic power operating, raise landing gear:
a. For pin drop landing gear, raise inner drop leg.
Secure each leg with a park stand retaining pin in
the full “up” position before transporting.
b. For crank landing gear, retract landing gear by
turning hand crank on control panel
counterclockwise. Use low gear until the load is
off the landing gear. Then shift to high gear and
continue cranking until fully retracted. Leave the
landing gear in high gear.

CAUTION
2. Determine that the traveling undercarriage is
completely slid back to transport position. Hold AXLE
CONTROL lever (See “Air Suspension Dump
Valve” on page 3-8) in the transport position until
hydraulic system works against the fully extended
hydraulic telescopic axle cylinder. Shut off hydraulic
power.
3. 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.
4. Check tire inflation; adjust as needed to the pressure
listed on the semitrailer VIN plate, located on the
front of the semitrailer.
5. Check tractor/semitrailer rig for air leaks. If air
leakage is found, repair the defect before
transporting.
6. 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.
7. 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.
Always grip crank handle securely with both
hands. Never shift landing gear under load, leave
the gears in neutral or leave the crank unsecured.
1. Landing gear legs must be fully retracted. Pin
drop landing gear must be secured with pins
before operating or moving semitrailer.
2. If semitrailer is loaded when operating
landing gear, load must be centered on the
trailer.
Eastern Wrecker Sales Inc

3-6 F-823-0216 Edition
OPERATING INSTRUCTIONS
Towing the Semitrailer

CAUTION
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 affect 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.
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 and undercarriage cylinder.
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.
Eastern Wrecker Sales Inc

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. Lower the landing gear:

WARNING
a. Lower the pin drop landing gear to the ground.
Pin through both inner and outer legs of landing
gear.

CAUTION
b. For optional crank landing gear, turn crank
handle clockwise to extend. Using high gear,
lower the landing gear until the pads make
contact with the ground. To reduce the load on
the fifth wheel, shift to low gear and crank an
additional four to eight turns. Leave the landing
gear engaged in low gear.
3. Disconnect the emergency and service air lines and
attach them to the tractor gladhand holders. If
present, install dummy gladhands on trailer
couplings.
4. Disconnect the 7-pole cable and hydraulic lines from
the semitrailer and store with the tractor.
5. Pull the tractor fifth wheel plate latch release lever.
6. 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 5 and 6.
7. Pull the tractor away from the semitrailer.

DANGER
When leaving the semitrailer unattended,
position all hydraulic controls to the neutral or
“off” position and shut off the hydraulic engine
power supply, or disconnect the tractor hydraulic
hook-up.
With pin drop stands, be sure to secure each leg
with pin before leaving semitrailer unattended.
Always grip crank handle securely with both
hands. Never shift landing gear under load. Never
leave the gears in neutral or the crank unsecured.
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.
Eastern Wrecker Sales Inc

3-8 F-823-0216 Edition
OPERATING INSTRUCTIONS
Axle/Tail Control Lever
The Axle/Tail Control Lever is located on the control
panel (See Figure 3-3.) The lever is used both for
loading/unloading and dock leveler operation. See step 2
of “Dock Leveler Control Operation (Option)” on
page 3-17 for use of Axle/Tail Control Lever for dock
leveler operation. The Axle/Tail Control Lever is beside
the winch control lever and has three positions (See
Table 3-1.)
Table 3-1: Axle/Tail Control Lever
Air Suspension Dump Valve
1. The 900D Series semitrailer comes equipped with a
“dump valve” on the air ride suspension as standard
equipment (See Figure 3-3.) The valve has two
primary purposes.
2. When the trailer is in the load position (tail down), you
can dump the air (turn knob to ON) to achieve the
lowest load angle.
a. It is NOT necessary to dump the valve each and
every time that you ground load; however, when
you need to minimize the load angle to load on
the tail or over the hinge, then you can dump the
air. The only time to operate the dump valve
during the ground loading process is while the
axles are in the foremost forward position.
IMPORTANT
Do not operate the axles while the air is dumped
(knob turned on.)
b. To load, bring your axles forward until your travel
cylinder stops, dumped the air (turn knob to ON.)
c. Before returning the trailer axles to transport
position, return the dump valve knob to the OFF
position. This will inflate the air suspension and
give proper clearance for the tires and traveling
undercarriage.
3. While loading from a dock (tail at dock height), the
dump valve will exhaust all air from the suspension.
This places the suspension and trailer in the most
stable position for loading heavy equipment from a
dock onto the trailer deck.
a. It is common to use the dump valve each and
every time while loading/unloading from a dock.
It adds stability and safety to the operation.
b. To load from a dock, bring the undercarriage
forward to engage the dock arm. Return the
undercarriage rearward and raise the tail a few
inches above dock height.
c. Dump the air (turn knob to ON position). The air
will exhaust from the suspension and lower the
tail to dock height. If you need to adjust the axles
to better match the dock height, it is ok to move
the axles forward or rearward those few inches to
accomplish the required height.
AXLE/TAILCONTROL LEVER
PUSH IN
In this position, the undercarriage
slides forward lowering the tail for
loading.
CENTER This is the neutral position.
PULL OUT
In this position, the undercarriage
slides to the rear raising the tail The
undercarriage must be in the rear-most
position for transport.
Eastern Wrecker Sales Inc