Specifications

the lug nut torque is not

maintained over more

than one re-torque appli-

cation because this indi-

cates there is something

potentially wrong with

the lug nuts, nut studs,

wheels and/or hubs and

should be corrected.

• Contact an authorized

MasterCraft dealer imme-

diately if any persistent

lug nut loosening (or any other lug, wheel or axle problem) occurs.

• In the event of a wheel separating from the trailer during use, notify an au-

thorized MasterCraft dealer. Seek prompt professional assistance in assess-

ing the trailer and its gear, and retain but do not re-use involved lug nuts,

wheels and studs. Do not repair or service the trailer yourself. Instead, call

a trained technician.

• Use the following pattern to tighten lug nuts. On ﬁrst torquing pass tighten

to 45 ft-lbs. On second pass tighten to 70 ft-lbs. On third pass tighten to 90

ft-lbs. On fourth pass tighten to a reading between 110 ft. lbs-120 ft-lbs.

Lubrication

Currently, trailers feature oil-bath bearings. Earlier models were equipped

with easy lubricating hubs. However, water invades and seeps through the small-

est of openings. When a warm hub is submerged in cold water, any air inside the

hub will contract and draw water through even the best of seals.

e manufacturer suggests a standard 50-weight motor oil be used with

this system. e oil bath system utilizes the same internal components as a

conventional greased system. e only diﬀerence is the hub and cap. e cap is

made from polycarbonate and is threaded into the hub. With this clear cap, it is

possible to monitor the oil level inside the hub with a quick visual check.

Trailers equipped with the Bearing Buddy II with Auto Check simplify the pro-

cess of keeping watch for proper lubrication. If the blue ring is fully extended

(about ¼-inch extruded), there is adequate lubrication. As the grease dissipates,

the ring will move back into the shell. When the blue ring is ﬂush with the Bear-

ing Buddy shell, it is time to re-lubricate.

e best protection against wheel bearing damage from water is to always

keep the wheel assembly properly lubricated. View the sight window locat-

ed on the axle hub and determine whether the lubricant appears milky. is

MasterCraft Trailer Manual • Page 16