Just like any other vehicle, your Leonard trailer requires routine maintenance to ensure that it is safe, performs properly, and lasts a long time.
Leonard manufactures, sells and services trailers. Each of our 54 trailer locations has a service center and can schedule a service check or perform most repairs. Leonard also offers trailer options and accessories for most standard utility and cargo trailers. Regular service check-ups help avoid voiding component warranties. Call a dealer near you to schedule an appointment or discuss repair costs.
10-Point Services Check
- Grease Axles if needed (easy grease axles only)
- Check Tire Pressure
- Check Tire Tread
- Tighten Lug Nuts
- Inspect Brake System*
- Test Lights:brake lights, rear running, and turn signals
- Check Floor Boards
- Check Door, Ramp, and Gate Latch Operation**
- Check Joints for Weld Stress**
- Check Jacks for Proper Operation
*If work is needed, a quote will be provided.
**Overloading can cause stress to weld joints, causing them to crack.
1. Grease Axles
Instructions for greasing the axle:
- Remove the rubber plug from the end of the grease cap.
- Place a standard grease gun onto the grease fitting located in the end of the spindle. Make sure the grease gun nozzle is fully engaged on the fitting.
- Pump grease into the fitting. The old displaced grease will begin to flow back out the cap around the grease gun nozzle.
- When the new clean grease is observed, remove the grease gun, wipe off any excess, and replace the rubber plug in the cap.
- Rotate hub or drum while adding grease.
2 & 3. Check Tires
Using a standard tire gauge check the pressure of each tire.
UNDERINFLATION: Wear on both edges:
4. Tighten Lug Nuts
Use the dry wheel lug torque values specified in the vehicle's owner's manual, shop manual or obtained from the vehicle dealer/service provider. The chart below lists typical torque values that should only be used temporarily until the vehicle's exact torque values can be confirmed.
Since the thickness of an alloy wheel can differ from Original Equipment wheels, also verify that the lug nuts or bolts will engage the threads. Refer to the chart below to determine the number of turns or the depth of engagement typical for your stud or bolt size.
|Hardware Bolt or
|Typical Torque Range
|Minimum Number of Turns
of Hardware Engagement
|12 x 1.5 mm||70 - 80||6.5|
|12 x 1.25 mm||70 - 80||8|
|14 x 1.5 mm||85 - 90||7.5|
|14 x 1.25 mm||85 - 90||9|
|7/16 in.||70 - 80||9|
|1/2 in.||75 - 85||8|
|9/16 in.||135 - 145||8|
|1st Stage||2nd Stage||3rd Stage|
|20 to 25 ft/lbs||55 to 60 ft/lbs||85 to 90 ft/lbs|
When installing new wheels you should re-torque the wheel lugs after driving the first 50 to 100 miles in case the clamping loads have changed following the initial installation. This is necessary due to the possibility of metal compression/elongation or thermal stresses affecting the wheels as they are breaking in, as well as to verify the accuracy of the original installation. When rechecking torque value, wait for the wheels to cool to ambient temperature (never torque a hot wheel). Loosen and retighten to value, in sequence. Simply repeat the same torque procedure listed above.
5. Inspect Brake System
Brakes are required on some trailers (all tandem axles and some single axle based mainly on weight class).
Brakes do fail and under perform from time-to-time and must be checked and maintained.
The most common reason for poor brake performance is improper brake adjustment. Adjusting the breaks is a procedure that you can do yourself, although most people leave it to service centers.
The second most common problem is faulty, improperly installed or improperly used wiring or electrical components.
The first step in isolating brake problems is to identify the amount of power going to the brakes. We have trouble shooting procedures based on the nature of the issue:
> No Brakes
Example of "No Brakes" cause / procedure