TM 5-3805-262-20
3-24. ACCESSORIES TROUBLESHOOTING)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. AIR HORN DOES NOT SOUND WHEN HORN VALVE DEPRESSED.
Step 1.
Install transport/service link to prevent loader from turning.
Crack (loosen) tube fitting at air horn.
B e f o r e p e r f o r m i n g t h e f o l l o w i n g s t e p s , b e s u r e t h a t t r a n s p o r t / s e r v i ce
l i n k i s e n g a g e d.
Failure to do so could cause serious injury or death
due to chassis pivoting and crushing you when you are working in area
between front and rear chassis.
Tell assistant to start engine and
allow air pressure to build up as
indicated by AIR PRESS gage indica-
t i o n .
Tell assistant to press horn valve.
Hissing should be heard from tube
fitting connection loosened above.
Step 2.
a .
b .
If hissing is heard, remove and
repair air horn (page 10-8).
Replace air horn diaphragm if
damaged (page 10-9).
I f h i s s i n g i s n o t h e a r d , t e ll
a s s i s t a n t t o s h u t o f f e n g i n e.
Tighten tube fitting connection loosened above, then go to step
2 below.
Drain air from air reservoir by
opening drain valve located at
bottom of air reservoir.
Unlock and open front access
door .
Disconnect air hose connected
between horn valve and tee
f i t t i n g i n s t a l l e d i n p r e s s u re
protection valve port at tee
f i t t i n g .
Connect a zero to 200 psi
pressure gage to adapter
i n s t a l l e d i n t e e f i t t i n g .
Close air reservoir drain valve.
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