TM9-2330-374-14&P
S l a c k adjuster adjustment
(4) Apply a 9/16 wrench to worm shaft hex head (2). Push in against slack
adjuster (3) to unlock worm shaft.
(5) Turn hex head of worm shaft (2) clockwise on slack adjuster until wheel
cannot be turned.
(6) Back off the worm shaft until wheel turns freely.
(7) Repeat steps 1 through 6 for other slack adjuster, if required.
( 8 ) Lower jack and remove from axle.
E m e r g e n c y Relay Valve, D r a i n a g e o f M o i s t u r e a n d T e s t s .
b.
(1) Operating tests.
(a) W i t h a i r h o s e c o u p l i n g s c o n n e c t e d t o t o w i n g v e h i c l e , a p p l y b r a k e s .
Check that brakes of all semitrailer wheels apply properly.
( b ) R e l e a s e brakes.
Check that each brake releases promptly.
(c) With brake system fully charged, close shutoff cock in emergency line on
t o w i n g v e h i c l e . D i s c o n n e c t air hose coupling tagged EMERGENCY. Make
sure semitrailer brakes apply automatically.
( d ) Connect air hose coupling tagged EMERGENCY. Open shutoff cock on towing
vehicle.
Check that brakes release automatically.
(2) Leakage tests.
(a) With air brake system connected, apply soapy water to relay valve flanges
and to service a i r l i n e c o u p l i n g . No leakage is permitted. Tighten nuts
o n flanges and t i g h t e n c o u p l i n g a s r e q u i r e d .
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