From owner's manuals to our library of useful maintenance videos and information, we've made it easy for you to keep your Trinity belt trailer in excellent running condition. And we're always a phone call away if you need the experts.

electric-systemIt is important that your Trinity trailer or truck bed be inspected and serviced on a regular basis to keep it in a safe and functional condition. Regular maintenance will also save you money in costly repairs over time.

For specific maintenance information, please consult the owner’s manual for your particular trailer.

Maintenance Videos

Servicing the Planetary Gearbox

Changing the Hydraulic Oil

Chain & Flap Assembly Adjustment

High Pressure Filter Element Maintenance

Find Your Owner's Manual

Maintenance Intervals

We recommend that you follow the general preventative maintenance schedule below. The intervals given are for nominal operating conditions; service more frequently if the trailer is used in an overly humid or dusty condition.

AFTER THE FIRST 50 TO 100 MILES

  • Check torque of cap nuts or flange nuts on each wheel

AFTER THE FIRST 1,000 MILES

  • Check torque of suspension hardware
  • Check alignment of suspension

AFTER THE FIRST 50 HOURS OF OPERATION

  • Replace the hydraulic oil and filter
  • Replace the oil in the planetary gearbox

EVERY 100 HOURS OF OPERATION

  • Clean the spark arrester on the gasoline engine (if applicable)

EVERY 250 HOURS OF OPERATION

  • Replace the hydraulic oil filter

EVERY 2,500 MILES OR BI-WEEKLY (WHICHEVER COMES FIRST)

  • Lubricate the pins and bolted connections on the maintenance ladder with a spray lubricant (such as WD40).
  • Check all maintenance ladder bolted connections and verify that they are tight

EVERY 5,000 MILES OR ONCE A MONTH (WHICHEVER COMES FIRST)

  • Wash trailer thoroughly with a mild detergent and water
  • Check general structural condition for corrosion or cracks • Inspect kingpin area
  • Check clearances and torque of air-ride suspension system (if applicable)
  • Visually check alignment of suspension
  • Check condition of lights
  • Check security of registration box and required paperwork
  • Check wiring harness for cracking or chafing
  • Check hydraulic and pneumatic lines for signs of leakage or wear
  • Drain moisture from air reservoirs
  • Check hinges on rear door(s) for signs of damage
  • Lubricate hinges, latches and bearings (if applicable) on rear door(s)
  • Inspect brake components for proper adjustment and for any sign of damage
  • Check tires for excessive wear and proper inflation
  • Check wheel nuts for proper torque
  • Check wheel seals for leaks
  • Check level of oil in axles
  • Check conveyor system for excessive wear or damage
  • Check condition of tarp system, if installed
  • Check condition and security of mud flaps
  • Check oil level in planetary gear on conveyor hydraulic and add if necessary

 

EVERY 15,000 MILES OR THREE MONTHS
All items listed above plus:

  • Check all hardware; replace any which are damaged or missing; tighten any loose bolts or nuts
  • Clean grease off kingpin plate and inspect for excessive wear or cracks
  • Measure alignment of suspension; adjust if out of allowable tolerance
  • Inspect all welded connections and joints on suspensions
  • Check for proper torque of all bolts and nuts on the suspension system
  • Replace hub bearing lubricant
  • Lubricate automatic slack adjusters
  • Inspect brake drums, lining and shoes
  • Test operation of brakes
  • Inspect brake lines for wear or chafing
  • Lubricate conveyor chains and front shaft bearings
  • Check condition of front and rear chain sprockets and bearings for wear or damage
  • Check lining of the trailer for cracks or damage; check floor lining for excessive wear
  • Check condition of gladhand seals
  • Lubricate the door seals
  • Service gasoline engine in accordance with the manufacturer’s recommended procedures (if applicable)
  • Check aluminum sidewall extensions for damage or cracking (if applicable)

ONCE A YEAR
All items listed above plus:

  • Drain and replace hydraulic fluid from reservoir
  • Replace hydraulic oil and filter (or every 1,000 hours, whichever is first)
  • Replace oil in the planetary gearbox (or every 1,000 hours, whichever is first)
  • Lubricate landing legs

Trinity trailer planetary

Looking for an expert to help repair your Trinity trailer? Nobody takes care of your belt trailer better than the people who built it. Contact us today.

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