TM9-2330-374-14&P
T a b l e 4-2.
O r g a n i z a t i o n a l Troubleshooting Table - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 9.
Visually check for broken or frozen camshaft roller.
I f c a m s h a f t r o l l e r i s b r o k e n o r f r o z e n , replace (para. 4-40).
SLOW BRAKE APPLICATION OR RELEASE.
3.
Step 1.
Check for low air pressure indication on air pressure gage in towing
Check air lines/connectors for restrictions.
vehicle.
T i g h t e n connections; remove any restrictions from hoses and
repair or replace as necessary.
If air pressure gage indicates normal, go to step 2.
Step 2.
Check operation of emergency relay valve (para. 4-30).
If-emergency r e l a y v a l v e i s d e f e c t i v e , r e p l a c e v a l v e ( p a r a . 4 - 3 8 ) .
I f emergency r e l a y v a l v e i s n o t d e f e c t i v e , g o t o s t e p 3 .
Step 3.
C h e c k for weak or b r o k e n b r a k e s h o e t e n s i o n s p r i n g .
I f s p r i n g i s w e a k or broken, r e p l a c e ( p a r a . 4 - 4 0 ) .
I f s p r i n g i s not defective, go to step 4.
Step 4.
Check for defective air chamber.
If air chamber is defective, replace air chamber (para. 4-37).
If air chamber is not defective, go to step 5.
Step 5.
Visually check for broken or frozen camshaft roller.
I f c a m s h a f t r o l l e r i s b r o k e n o r f r o z e n , replace (para. 4-40).
4.
GRABBING BRAKES.
Step 1.
Check for moisture in air reservoirs.
O p e n drain cocks for drainage of moisture from air
reservoirs.
If no moisture is present, go to step 2.
Step 2.
Check brake adjustment (para. 4-30).
If brakes are out of adjustment, adjust brakes (para. 4-30).
If brakes are not out of adjustment, go to step 3.
Step 3.
Check for grease on brake lining.
If grease is present, replace brake shoes (para. 4-40).
If grease is not present, go to step 4.
Step 4.
Check for loose or worn wheel bearings (para. 4-45).
If wheel bearings are loose, adjust bearings (para. 4-45).
I f w h e e l b e a r i n g s c a n n o t b e a d j u s t e d , r e p l a c e b e a r i n g s ( p a r a . 4-
45).
If wheel bearings are not loose or worn, go to step S.
