Bearing number/springs/wheel size questions

[ericlcarter1]

I just bought a tandem axle trailer to replace the single axle my boat was riding on. I am going to have to pretty much rework everything but the frame and the axles. This is my first time to work on a boat trailer and just want to get everything right the first time.

Question 1: I found the number stamped on the bearings I'm replacing: L44649R. What do the L and the R mean? When I buy new ones do I just use the 44649 number?

Question 2: the trailer is galvanized steel and the frame is in good shape. The springs look to be solid but do have a layer of rust on them. When do springs needs replacing? How should I go about getting the rust off?

Question 3: the trailer came with 13 inch wheels. Can I move up to 14 inch if I wanted to? I think there is enough clearance under the fenders. What are the pros/cons of this move?

Thanks,
Eric

 

[Silvertip]

Re: Bearing number/springs/wheel size questions

You use the numbers on each bearing component. The race and cone both have numbers. A third number may designate the two-piece set when you go to buy the bearings. The "L" and "R" are manufacturer codes but you will find the "L" used in most replacement bearings.

If you feel ambitious, you can remove the springs, remove the center bolt that holds the spring pack together and then clean and repaint the springs but that is waste of time. They flex, scrape together, and the paint will soon be cracked and the rust will reappear. Springs do not need to be replaced unless a leaf is broken or the entire set has collapsed. spring leafs usually break through the center hole.

There is no issue with increasing tire diameter but be sure you understand the load rating system. A 14 inch tire can have a higher load rating than a 15 inch tire. Determine the total load your tires required to carry. That includes the weight of the trailer, the boat, the motor, fuel, gear and any other stuff in the boat. On a tandem trailer, divide that number by 4 (4 tires) and add a 10% safety margin. Then look at the load capacity of the tire you have. If it is well within the value you determined there is no need to change tire size or load rating. If the numbers become marginal, then a load rating increase and even a tire size increase may be advised. ALWAYS keep trailer tires aired up to the maximum pressure indicated on the sidewall.