SERVICE UTILITY SYSTEM WHEEL BRAKE ACCUMLATOR
Read accumulator gage (2). If indicated pressure
is greater than 600 psi and less than 850 psi, go
to Follow-On Maintenance. If indicated pressure
is less than 600 psi or greater than 850 psi, go
to step 3.
High pressure air trapped under valve
cap can be a hazard. If cap is not
removed slowly, air can pop it off and
Loosen cap (3) on charging valve (4) one or two
turns. Allow any trapped air to escape.
When depressurizing the accumulator,
high pressure air will be released
from the accumulator charging valve.
Ensure body parts are well clear of
high pressure air or injury will result.
Remove cap (3). To depressurize system
accumulator, go to and complete step 5 and stop.
To service system accumulator, connect chuck
(5) from air source to valve (4) before going to
step 5 and on.
Depressurize accumulator slowly.
Fast depressurization will result in
internal damage to the accumulator.
Hold body of valve (4) with wrench. Turn valve
outer nut completely counterclockwise to open
Charge accumulator (7) with dry air or nitrogen
to 700 psi.
Tighten outer nut of valve (4). Torque to 60
Lockwire nut (6). Use lockwire (E231).
Shut off air source. Remove chuck (5).
Install cap (3) on valve (4).
Close forward fairing left work platform (Task 2-2).
END OF TASK