Mityvac 06820 Diesel Compression Test Adapters - Manual (Page 20)

Page Number - 20
Form 822378
lightly, with the bleeding valve open,
then proceed to use the pump.
MOTORCYCLE BLEEDING
PROCEDURE
Before bleeding the system, ensure that
1) the brake caliper pistons are free to
move within the calipers.
2) the master cylinder piston is free to
return to the end of its stroke, and
3) inspect the line to ensure that all
fittings are tight.
FRONT BRAKE
1) Pump brake lever to seat caliper pads
against rotor.
2) Cover gas tank with plastic protective
sheet if using DOT 3 fluid (not
necessary if using DOT 5 fluid).
3) Remove master cylinder reservoir cap
and fill reservoir.
4) Attach a 5/32” ID connection hose to
brake bleeding fitting.
5) Pump several times to create vacuum.
Crack bleeder valve with box
wrench, extracting fluid into reservoir.
(Stop and add fluid when master
cylinder begins to get low. Do not
allow air to enter line.) At this point,
all air should be out of system and line
full of fluid. (Note: if air is entering the
pump hose from around bleeder
fitting, remove bleeder fitting and
apply Teflon tape to threaded portion
of bleeder screw only. This will
prevent air seepage around threads
of bleeder screw.)
6) While maintaining vacuum on the
pump line, tighten bleeder fitting.
7) Top off reservoir and reinstall cover.
Check brake by pumping lever several
times. Pedal should have a positive,
solid feel. If not, repeat bleeding
process as more air may have
entered the system. Inspect line to
ensure all fittings are tight. If brake
still feels slack, consult a service
technician.
For dual disc front brakes, repeat
bleeding process as though there are
two separate systems.
REAR BRAKE
Removing all air from the rear brake line is
the same as for the front. The rear brake
reservoir is usually located beneath one
of the side covers.
1) Remove the master cylinder cap and
fill to near full.
2) Attach the pump hose to the bleeder
fitting and pump the handle several
times to create a vacuum.
3) Crack the bleeder with a box wrench.
Because of the short line, most of the
air should be evacuated the first time.