Important: Do not use brake fluid drained from the brake sys-
tem to refill the master cylinder reservoir as such fluids contain
contaminants from the system that may result in brake failure or
costly repairs.
Trailer Jack
MasterCraft recommends using the
trailer jack to lift the coupling of a loaded
trailer from the hitch ball. Rotate the
trailer jack to the vertical position and
engage the locking pin before placing a
load on the trailer jack.
Like any mechanical assembly, the trailer
jack requires maintenance to continue to
function properly. The drive gear and the
rack-and-pinion should be greased, and
the caster and wheel bearings should be
oiled frequently.
Failure to swing up the trailer jack and snap into towing position
before towing may result in damage to the trailer.
To ensure the jack is locked in the up or down positions, there will be
an audible “click” when the locking pin is fully engaged. Check that
the jack is locked by trying to move the jack out of place.
6. Repeat Steps 4 and 5 for the other brake, as well as the brakes
on the front axle of tandem axle trailers, or the center then
finally the front on triple axle trailers. If installation is on a tan-
dem-axle or triple-axle trailer, repeat the bleeding procedure on
the rear axle(s) brakes for a second time to assure purging of all
air in the system.
7. Push down on the safety release bracket to ensure that the push
rod is in the released position.
8. After the bleeding is completed, recheck the fluid level in the
master cylinder. Fill the master cylinder reservoir to 1/8” from the
bottom of the threads on the reservoir cap. Do not overfill.
9. As a final check after bleeding is completed, stroke the push
rod and check to be sure the brake system is pressurized. This
is done by attempting to rotate a tire around. It is highly recom-
mended to check the function of the brakes prior to running down
the road. Attempt to back-up the trailer (preferably up and in-
cline) without the wiring harness connected. This should activate
the brakes to verify they are working as expected. If an incline is
not available, and with the wiring harness disconnected, attempt
to back-up the trailer against a wheel chock hard enough to slide
the actuator rearward into the frame and engage the brakes.
Remove the wheel chock and continue to back up to verify the
brakes are engaging.
2021MCOwnerManualFINAL.indd 421 8/26/20 1:55 PM
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