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Air Motor and Throat Service
1 0 .
Pull the piston assembly from the air motor base
(28),
and set it aside.
11.
Remove the vee block seal
(lot)
with a pick, and
clean the groove in the air motor base
(28).
Remove any dirt in the groove, and wipe the
groove clean with a cloth.
12.
Inspect the air motor for damaged or wom inlet
valve grommets
(173,
O-ring packings
(19*, 207,
valve nuts (217, lock wires (227, exhaust valve
poppets
( 2 6 ' ) ,
or inlet valve poppets
( 3 2 ' ) . If
any
of these parts need to be replaced, continue with
steps
13
to
1 9 .
Otherwise, see Reassembly on
page
12.
13.
Use a screwdriver to push down on the trip rod
yoke
(13),
and snap the toggles down. See Fig.
4 .
MOVING
PARTS
HAZARD
I
To reduce the risk of pinching or
amDUtatinP Your finaers. keeD Your
I
I
\
fingers cl&; o f the ioggie assemblies
Fig.
4 )
up
or
down.
I
when you are snapping the toggles (M
in
14.
In this step, while
you are
prying with the
screwdriver with one hand, cover the toggle
spring-loaded toggle assemblies when they snap
assemblies with your other hand
so
as to catch the
out of the
lugs.
Place the lip of a screwdriver into
the piston between the piston lugs
(L)
below the
pivot pins
(16)
on the toggles, pry up with the
toggle assembly (M) up and away from the piston
screwdriver handle to compress the springs on the
lugs, and remove the parts. See Fig.
4 .
15.
Straighten the lockwires (22') and remove them
from the valve nuts
(21.).
Screw the top nuts off.
Remove the trip rod yoke
(13),
actuator
(12),
and
trip rod
(31).
Unscrew the bottom nuts
( Z l ' ) ,
and
remove the poppets. Make sure the valve bar
they properly guide the actuator
(12).
spring clips
(14)
are not worn or damaged and that
16.
Remove the exhaust valve poppets
(26)
by cutting
them with a side cutter, then pull them out
of
the
actuator
(12).
17.
Clean all the parts carefully in a compatible solvent
and inspect them for wear or damage. Use all the
repair kit parts during reassembly, and replace
other parts as necessary.
18.
Check the surfaces of the piston, piston rod, and
will cause premature packing wear and leaking.
cylinder'wall for scratches or wear. A scored rod
19.
Lubricate all parts with a light, waterproof grease.
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