This manual provides operating, servicing, and maintenance instructions, for Models L20, L24, L40, and L50 Tag Trailers, manufactured by Landoll Corporation, Marysville, Kansas 66508. gives 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. The Warranty Registration form is located with the product documents. Fill it out and mail it within 15 days of purchase. The Warranty is printed inside the front cover.
SPINDLE TORQUE/BEARING ADJUSTMENT (FOR 9K-15K AXLES)
- Install the bearing and washer into the hub. Thread on the inner nut, rotate the hub and tighten the nut until the hub will not rotate. This requires a minimum of 100 ft.-lb. of torque.
- Loosen the nut to remove preload torque.
- Hand tighten the nut and back it off 1/4 to 3/8 turn.
- Place the tang washer on the spindle and bend one tang inward over the nut. This will keep the inner nut from turning while torque is applied to the outer nut.
- Install the outer nut and torque it to 225-250 ft.-lb. Insure that the inner nut does not turn. Bend two tangs from the tang washer over the outer nut flats to secure.
- Install cap with the o-ring and plug installed. Rotate the hub and check the bearing adjustment. The allowable end play is .001"-.010".
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. Landoll L20 Series Operator's Manual,Landoll L20 Series,Landoll L20 Series Owner's Manual,Landoll L20 Series User Manual
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.
COLD WEATHER OPERATION
Cold weather causes lubricants to congeal, insulation and rubber parts to become hard, which may lead to problems found in bearings, electrical systems, and air systems. Moisture attracted by warm parts can condense, collect and freeze to immobilize equipment. The truck/trailer operator must always be alert for indicators of cold weather malfunctions. During any extended stop period, neither the service nor parking brake should be used as they can freeze up. Use wheel chocks to secure the vehicle from moving.
MAINTENANCE AND LUBRICATION
This section contains instructions necessary for proper maintenance of the trailer. The trailer is designed for years of service with minimal maintenance. However, proper maintenance is important for durability and safe operation and is an owner/user responsibility.
MAINTENANCE SCHEDULE
Trailer maintenance includes periodic inspection and lubrication. Table 4-2, Maintenance Schedule, lists the recommended maintenance and lubrication tasks by time interval and by accumulated mileage (use whichever occurs first). Inspect the towing vehicle, the trailer, and trailer parts periodically for damage or signs of pending failure. Damaged or broken parts must be repaired or replaced at once. Determine the cause of any binding or fluid leakage at once. Correct the problem before using the towing vehicle or trailer.
MAINTENANCE PROCEDURES
Repair parts are illustrated and listed in the parts manual. Replacement of parts due to wear is determined by examination and measurement in the Maintenance Procedures of this section. Tools, equipment, and personnel normally found in a facility capable of making truck repairs will be adequate for maintenance of the trailer. No other special tools or equipment should be necessary. Standard Torque Values. Tables 2-2 and 2-3 lists torque values for standard hardware and is intended as a guide for average applications involving typical stresses and mechanical surfaces. Values are based on the physical limitations of clean, plated, and lubricated hardware. In all cases, when an individual torque value is specified, it takes priority over values given in this table. Replace original fasteners with hardware of equal grade.
FRAME AND DECKS
The trailer should be thoroughly checked daily for cracks or material fatigue. Cracks will normally show best under loaded conditions. If any cracks or breaks are found, immediately contact Landoll Corporation for recommended repair. Any defective parts must be replaced immediately.