Replacement Brakes and Bearings for 1993 Mastercraft Boat Trailer

Question:

I have a 1993 Mastercraft ski boat with a single axle trailer. It has 14”wheels and 5 bolt pattern. I assume it’s a 3500# axle. Any advice you can give me on which replacement brakes to get, and what size bearings? It’s the original Mastercraft trailer. Thanks.

1

Helpful Expert Reply:

Before you choose brakes or bearings you should verify what's currently on your trailer. If it is a 3,500 pound axle part # AKEBRK-35-SA will likely fit if the trailer has electric drum brakes. Both sides are included and labeled. They're also self-adjusting so you only need to set the adjustment when you first install them and then leave them alone. You can measure the inner diameter of your drums to find if this fit or not.

One of two bearing kits is likely what you need. You should check your current bearing numbers or measure the spindles to verify the correct ones. Part # BK2-100 uses # L68149 and # L44649 for the inner and outer bearings and part # BK1-100 uses # L44643 for both the inner and outer.

I've attached a couple of pictures to help you if you need to measure. If the parts I recommended won't work for you let me know what's currently on the trailer and I'll make correct recommendations for you.

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helpful expert reply by:
1
Charles S

Question:

Excellent response. Thank you. I failed to mention that my brakes are surge brakes though, not electric. Can you recommend replacement parts for surge brakes? Thanks again.

1

Helpful Expert Reply:

No problem at all. Sorry for the mixup. Determining the correct size is the same with hydraulic brakes as it is with electric. You still need to measure the drum. Still assuming you have 10 inch brakes I recommend part # AKFBBRK-35 instead which are free-backing so you can reverse even if your actuator engages.

Since you've got a boat trailer and brakes get wet a lot you may prefer the brakes with a Dacromet coating, part # AKFBBRK-35-D. These are especially beneficial if you're launching the boat in salt water a lot.

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helpful expert reply by:
1
Charles S

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