Lufkin Dump Trailer Owner'S Manual Download Page 1

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DUMP TRAILER

OWNER’S MANUAL

LUFKIN INDUSTRIES, INC.

P.O. BOX 849

LUFKIN, TX 75902-0849

800-324-3812

Summary of Contents for Dump Trailer

Page 1: ...DUMP TRAILER OWNER S MANUAL LUFKIN INDUSTRIES INC P O BOX 849 LUFKIN TX 75902 0849 800 324 3812 ...

Page 2: ... first consulting the LUFKIN Trailer Engineering Department Alterations could affect the structural integrity of the trailer and void the warranty Welding or other alterations should never be made to any air reservoir wheel rim air chamber or spring The gross axle weight rating GAWR that is stamped on the certification plate is the structural capacity of the lowest rated component of the suspensio...

Page 3: ...ational Highway Traffic Safety Administration 400 Seventh Street SW Washington D C 20590 or go to http www safercar gov You can also obtain other information about motor vehicle safety from the Hotline Upon request we will furnish any additional or more detailed maintenance and operational instructions including any non standard make of equipment that was specified and installed The following numb...

Page 4: ... 1 LIFT AXLE OPERATION 1 1 2 2 DUMP VALVE OPERATION 1 1 2 3 GENERAL ADJUSTMENT PROCEDURE FOR SETTING RIDE HEIGHT 1 1 3 ALIGNMENT 1 1 3 1 SPRING HUTCH 1 1 3 2 SINGLE POINT SUSPENSION AIR SPRING SUSPENSION 1 1 3 3 ALIGNMENT PROCEDURE 1 1 4 ADDITIONAL SUSPENSION MAINTENANCE CHECKS SECTION 2 PAGE 16 2 1 AXLE MAINTENANCE 2 1 1 WHEEL BEARING SPINDLE NUT ADJUSTMENT 2 1 2 WHEEL BEARING CAUTIONS 2 1 3 OIL ...

Page 5: ...NERAL INFORMATION 5 1 2 SAFETY RECOMMENDATIONS FOR TRAILER TIRES SECTION 6 PAGE 24 6 1 WHEELS AND RIMS 6 1 1 HUB PILOTED MOUNTING 6 1 2 STUD PILOTED MOUNTING 6 1 3 RIM AND WHEEL MAINTENANCE SECTION 7 PAGE 29 7 1 LANDING GEAR GENERAL 7 1 1 MAINTENANCE 7 1 2 EMPTY WEIGHT SECTION 8 PAGE 30 8 1 KING PIN AND UPPER COUPLER 8 2 INSPECTION CRITERIA 8 3 FIFTH WHEELS 8 3 1 FIFTH WHEEL MAINTENANCE ...

Page 6: ...UNLOADING 9 5 1 STOCK PILE 9 5 2 HOPPER 9 5 3 WINDROW 9 5 4 SPREAD OPERATION 9 6 TAIL GATE OPERATION 9 6 1 OPEN TAILGATE 9 6 2 LOCK TAILGATE 9 6 3 TAILGATE SAFETY REMINDERS 9 7 HOIST OPERATION 9 7 1 POWER TAKE OFF CONTROLS 9 7 2 HOIST CONTROL 9 7 3 OPERATION OF HOIST 9 7 4 IN TRANSIT 9 7 5 HYDRAULIC HOSES 9 8 TIP OVER CONDITIONS 9 8 1 WIND 9 8 2 TERRAIN 9 8 3 HUNG LOADS 9 8 4 JACKKNIFE ...

Page 7: ...LATCHES AND ASSEMBLY 10 1 2 FIFTH WHEEL ASSEMBLY 10 1 3 HYDRAULIC CYLINDERS 10 1 4 FLOORS AND WALLS 10 2 BOTTOM DUMP MAINTENANCE 10 2 1 DOOR HINGE PIVOT PINS 10 2 2 FIFTH WHEEL ASSEMBLY 10 2 3 AIR LINE LUBRICATOR 10 2 4 DOORS AND WALLS SECTION 11 PAGE 39 11 1 TRAILER DECALS SECTION 12 PAGE 45 12 1 SUPPLIER SECTION LAWS REGULATIONS AND INDUSTRY STANDARDS PAGE 48 LIMITED WARRANTY PAGE 49 ...

Page 8: ...pension which could cause a serious accident The following suspensions are standard on LUFKIN Trailers and the torque given must be maintained at the recommended intervals as well as the periodic inspections as listed All fasteners on the suspension of your new LUFKIN Trailer were torqued before delivery to the proper torque values Due to vibration and shock loads it is necessary after a break in ...

Page 9: ...Page 9 HUTCH 900 440 SERIES 1 1 1 2 AIR SPRING NEWAY RL SERIES HENDRICKSON INTRAAX SERIES LINK TO VENDOR FILE LINK TO VENDOR FILE LINK TO VENDOR FILE ...

Page 10: ...fittings or malfunctioning leveling valves Leveling valves should have proper clearance to permit leveling arm to actuate freely and not be bent or twisted Do not grease leveling valves There is a time delay of 2 to 6 seconds before the leveling valve will add or exhaust air to the air springs The proper position of the valve actuating lever is in the center or neutral Lever up will add air lever ...

Page 11: ...low Hendrickson height control valves 1 1 2 1 LIFT AXLE OPERATION Caution must be exercised when using lift axles Frame damage can result as well as bending axles should the liftable axle be raised under loaded conditions which will transfer additional weight to the axles remaining on the ground 1 1 2 2 DUMP VALVE OPERATION If specified by the customer a trailer may be equipped with a dump valve A...

Page 12: ... height of suspension by looking at tag on suspension or calling LUFKIN Trailers 1 1 2 3 3 Block axle to trailer frame to proper dimension by subtracting 1 2 of axle O D from ride height Cut a block of wood to this dimension and insert the block between axle and frame Lower trailer onto this block 1 1 2 3 4 Center the leveling valve to neutral position adjust linkage and secure it 1 1 2 3 5 Remove...

Page 13: ...nd torn this could be an indication of loose U bolts 1 1 3 3 ALIGNMENT PROCEDURE 1 1 3 3 1 Before taking axle alignment measurements make sure the trailer is unloaded and free the suspension of any binds by pushing the trailer backwards and then pulling the trailer forward While pulling the trailer forward on a level floor apply the brakes and release This will assure that an adjustable undercarri...

Page 14: ...nch for either axle Distance E is the distance between axle and trailer centerlines Figure 4 Figure 5 Gauge for measuring axle centers The gauge can be made of drill rod and must be rigid and true The pointer arms of the gauge must be parallel and held at the same height 1 1 3 3 5 Precautions A Always measure to the front axle ends for accurate alignment B Avoid measuring to rims suspension bracke...

Page 15: ... arms should be checked for being tight If slack is found it should be repaired immediately since this indicates that there is wear in the rubber bushing or torque arm parts Check the adjustable torque arm clamps for being tight Loose clamps will cause wear on the adjusting threads and the suspension cannot be kept in alignment On leaf spring type suspensions have the trailer checked for axle alig...

Page 16: ...Procedures for installation and wheel bearing adjustment may be found by clicking on the links below Axilok Spindle Nut Installation Stemco Spindle Nut Installation Stemco Wheel Bearing Removal and Installation 2 1 2 WHEEL BEARING CAUTIONS 2 1 3 1 INSPECTIONS 2 1 3 1 1 Inspect condition of sight glass on hubcap it should be clear and not discolored Change in color could indicate excessive heat If ...

Page 17: ...oil leaks It is recommended that any time the hub is removed that the complete oil seal be replaced Use gear type oil SAE 80WE 90 Change oil inspect bearings and clean all parts in hub at 50 000 mile intervals NOTE When replacing oil with grease consult seal manufacturer for proper seal and hubcap that is compatible with the selected grease Procedures for seal installation may be found by clicking...

Page 18: ...tment of Transportation As the complexity of the air brake system has increased so has the need for clean air Many of the later design valves contain small orifices and passages and thus are more susceptible to contaminants The prevention of freeze ups in the system is also equally important The use of an air dryer filter and alcohol evaporator is highly recommended The following items should be c...

Page 19: ...reservoir tanks should be drained daily to remove moisture and other contaminants More than once a day may be necessary in the winter when the humidity is high Parking brake application will begin after air pressure falls below 55 psi and application increases as air pressure drops Parking brakes will start releasing after the system pressure reaches 55 psi and should be fully released when pressu...

Page 20: ...LECTED THAT WILL PROMOTE BRAKE BALANCE BETWEEN TRACTOR AND TRAILER IF ANY BRAKE COMPONENT IS REPLACED IT SHOULD BE REPLACED WITH AN EXACT DUPLICATE PART THIS INCLUDES BUT IS NOT LIMITED TO RELAY VALVES QUICK RELEASE VALVES BRAKE LINING SLACK ADJUSTERS SAME LENGTH AND BRAKE CHAMBER SIZE 3 3 ANTILOCK BRAKE SYSTEM ABS It is required by law that all trailers manufactured after March 1 1998 have ABS Yo...

Page 21: ...eceptacle and wiring connectors clean and free of corrosion Any lamp reflector replacement must conform to the existing system It is required by law that all trailers manufactured after March 1 1998 have ABS The law further states that the Blue Wire 7 pin of the SAE 560 connector will provide constant power Your LUFKIN Trailer as manufactured meets or exceeds the requirements set forth in FMVSS 10...

Page 22: ...om your tire dealer Always deflate a tire by removing the valve core prior to removal from the vehicle or disassembling of parts Never reinflate a tire that has been run flat or seriously under inflated without removing and checking for damage Click on the link to see vendor file for general tire information 5 1 2 SAFETY RECOMMENDATIONS FOR TRAILER TIRES EXCEEDING THE MAXIMUM SPEED WILL CAUSE HEAT...

Page 23: ...ERSONAL INJURY REPORT TIRE DAMAGE TO YOUR DEALER AT ONCE AFTER THE FIRST TWO MONTHS OF OPERATION THE TRAILER SHOULD BE SERVICED FOR WHEEL ALIGNMENT THIS IS RECOMMENDED TO PREVENT UNEVEN TIRE WEAR AND HELP YOU GET THE MAXIMUM LIFE OUT OF YOUR TIRES CHECK TIRES BEFORE EACH TRIP WHILE THEY ARE COOL WHEEL ALIGNMENT IS RECOMMENDED AFTER TWO MONTHS ...

Page 24: ...d with flange nuts see Figure 8 which contact the disc face around the bolt hole and do not rely on contacting the bolt hole chamfer to function properly Hub piloted wheels generally have straight through bolt holes with no chamfers which provides a visual way of identifying hub piloted wheels It is important to note that some hub piloted wheels and stud piloted wheels may have the same bolt circl...

Page 25: ...e This will make the nuts hard to handle attract dirt to the nuts and may cause unsightly appearance to the wheel Only used nuts should be lubricated Since flange nuts generate higher clamping force always use grade eight studs with hub piloted wheels TORQUE NUTS PROPERLY ö Be sure to tighten wheel nuts to the recommended nut torque Do not overtighten Tighten nuts first to 50 ft lbs then to 450 50...

Page 26: ...e the stud threads Snug up the inner cap nuts to 50 ft lbs in sequence shown in Figure 9 Do not tighten them fully until all have been seated This procedure will permit the uniform seating of nuts and ensure the even fact to face contact of wheels hub and drum Tighten to 450 500 ft Ibs dry using the same criss cross pattern Align the hand holes to allow access to the air valves Nuts must be kept t...

Page 27: ...for proper torque output Use a torque wrench to check the air wrench output and adjust the line pressure to give correct torque 6 1 3 RIM AND WHEEL MAINTENANCE DURING TIRE CHANGE ö Inspect the rims and wheels for corrosion cracks and damage Thoroughly remove rust dirt and other foreign materials from all surfaces Pay particular attention to grooves for lock rings ö Brush and spray paint where corr...

Page 28: ...dor information click on the links below Accuride Wheels Conmet Hub Drums Service Manual KIC Hub Drum Catalog Webb Torque Specifications LINK TO VENDOR FILE LINK TO VENDOR FILE LINK TO VENDOR FILE LINK TO VENDOR FILE ...

Page 29: ...d asphalt or unlevel ground without proper support 7 1 1 MAINTENANCE To insure your landing gear will operate properly follow the manufacturers recommended maintenance instructions See the links below Holland Binkley Jost International 7 1 2 EMPTY WEIGHT Your LUFKIN Dump trailer may be equipped with landing gear supports that are intended for empty weight only Caution should be exercised to not dr...

Page 30: ...o mount fifth wheel to tractor The height must provide clearance between tires and the trailer when loaded allowing for spring deflection and tire chains Proper mountIng is necessary for the safe operation of the product and the safety of others The locking plunger on Holland fifth wheels must be adjusted on new fifth wheels and periodically with wear There is an adjusting screw in the crotch of t...

Page 31: ...R OF TRAILER WHILE DUMPING TRACTOR MUST BE LINED UP STRAIGHT WITH TRAILER TRACTOR AND TRAILER MUST BE ON FIRM AND LEVEL GROUND 9 1 7 AVOID DUMPING IN STRONG WIND LINE TRAILER UP WITH WIND TO AVOID POSSIBLE TURNOVER FROM CROSS WIND 9 1 8 OPERATOR SHOULD WARN ALL PERSONS TO STAND CLEAR AT LEAST 35 FEET FROM TRAILER WHILE DUMP IS BEING RAISED AND LOWERED 9 1 9 SHOULD DUMP TRAILER START TO TILT MOVE C...

Page 32: ...ver axles to get maximum legal load distribution 9 3 TARPING 9 3 1 Tarping should be used to prevent commodities such as sand gravel rubbish etc from damaging other vehicles following the trailer Tarping is mandatory on dumps in several states When tarping is not used the dump body of the vehicle should only be filled within 6 inches of the top of the side board top rail There are several means av...

Page 33: ...accomplished The doors are then shut and the trailer can move to make another windrow if desired 9 5 4 SPREAD OPERATION In road construction a uniform distribution or material spread is desirable so that the road grader time is minimized Common hazards to this type of operation include insufficient overpass clearances during spread loading buildup on tailgate due to restricted flow dumping on crow...

Page 34: ...ke off PTO unit is an auxiliary unit which bolts onto the transmission and is used to drive the hydraulic pump to lift the body Most hydraulic pumps are rated from 1 000 to 2 000 psi The motor should not exceed rated rpm as high speeds shorten pump life and create high pressures that may cause seal blowouts in the cylinder 9 7 2 HOIST CONTROL The hoist control is usually a three way valve having t...

Page 35: ...hung load is a commodity that does not discharge when a dump body is raised to an elevated position To avoid a tip over due to a hung load the driver should be warned by an observer of this condition and immediately lower the dump body 9 8 4 JACKKNIFE A jackknife position of the tractor with the trailer is dangerous when dumping With a frame type end dump in a jackknifed condition the upper couple...

Page 36: ...ggravates all of the above conditions that cause tip overs Lufkin Trailers are designed to carry and dump legal loads 9 8 9 SUSPENSION Prior to dumping the trailer suspension should be checked to make sure there are no broken springs damaged air bags loose U bolts etc Broken or weak springs should be replaced in matched pairs 9 9 MAXIMUM HEIGHT AND DUMP ANGLE 9 9 1 Dumping site should be carefully...

Page 37: ...until it is flush with top of cartridge body Pressurize cylinder and when all air is purged turn set screw clockwise to bottom out Usually the malfunction is due to foreign matter preventing the ball from seating The cartridge can be removed with a 3 4 thin wall deep socket Remove the set screw spring and ball Flush out wipe clean and reassemble The correct set screw depth is determined by the top...

Page 38: ...ders that control the operation of the doors These cylinders are equipped with an air line lubricator This lubricator is provided to ensure smooth operation of the cylinders The oil level and filter should be checked periodically to ensure that the lubricator continues to remain effective Add oil and clean the filter as needed 10 2 4 DOORS AND WALLS Periodic inspection of the inside of hopper is i...

Page 39: ...l different purposes including maintenance information safety information and information about compliance with state and federal regulations If your trailer is missing any of the decals shown below please contact LUFKIN for replacement information FRONT DECALS These are the required decals for the front of your trailer ...

Page 40: ...Page 40 These decals should be on the front of a LUFKIN model ULD and HRD end dumps only ...

Page 41: ...LS The serial plate will be on the front on a bottom dump see picture on previous page and as shown below on a model ULD and HRD These are the decals you should see on the radius arms landing gear on a model ULD and HRD ...

Page 42: ...Page 42 These are the decals you should see on the bottom dump hopper and doors These are the decals you may see in the suspension area They may vary depending on suspension type ...

Page 43: ...Page 43 ...

Page 44: ...Page 44 These decals may be seen at the rear of the trailer near the ABS light REAR DECALS These are the decals you should see on the rear bolster on a ULD and rear end on a HRD ...

Page 45: ... 894 1044 www crewsonindustries com DI PRO Inc 1550 N Peach Fresno California USA 93727 Phone 800 286 3643 www di pro com Haldex Brake Products Corp 10930 North Pomona Avenue Kansas City MO 64153 Phone 816 891 2470 www haldex com Meritor Wabco 2135 West Maple Road Troy MI 48084 Phone 800 535 5560 www meritorwabco com MGM Brakes 8530 Cliff Cameron Drive Charlotte NC 28269 9786 Phone 800 527 1534 ww...

Page 46: ... KINGPINS The Holland Group Inc PO Box 2099 Holland Michigan 49422 2099 Phone 616 396 6501 www thehollandgroupinc com LANDING GEAR The Holland Group Inc Binkley 101 S Elm PO Box 370 Warrenton MO 63383 0370 Phone 636 456 3455 www thehollandgroupinc com Jost International 1770 Hayes Grand Haven MI 49417 Phone 800 253 5105 www jostinternational com SUSPENSIONS Hendrickson Trailer Suspension Systems 2...

Page 47: ...ayes Lemmerz International 428 Sieberling St Akron OH 44306 3282 Phone 800 337 0457 www hayes lemmerz com MacLean Vehicle Systems 1000 Allanson Road Mundelein IL 60060 Phone 800 323 4536 www mfmvs com Stemco LP 300 Industrial Blvd P O Box 1989 Longview Texas 75606 1989 Phone 800 527 8492 www stemco com VNC Bearing Inc P O Box 73455 Cleveland OH 44193 Phone 800 862 3211 www vncbearing com Walther E...

Page 48: ...act Guard FMVSS 224 Rear Impact Guard Recommended practices and tech bulletin Truck Trailer Manufacturers Association Alexandria VA 703 549 3010 www ttmanet org American Trucking Association The Maintenance Council Washington D C 703 838 1763 www truckline com Society of Automotive Engineers Warrendale PA 724 776 4841 www sae org American Society for Testing and Materials ASTM West Conshohocken PA...

Page 49: ...ulfill all obligations of LUFKIN With respect to component parts materials or accessories manufactured furnished or supplied by individuals or entities other than LUFKIN including but not limited to refrigeration units tires tubes suspensions axle assemblies wheels bearings landing gears brakes anti lock components spring brakes air brake valves lights and hydraulic components or any non standard ...

Page 50: ...Page 50 LUFKIN INDUSTRIES INC P O BOX 849 LUFKIN TX 75902 0849 800 324 3812 Revised 11 06 ...

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