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Air Motor
and Throat
Service
14
26*
21*
Fig.
4
Cutaway View
Reassembly
1. Place the piston rod (29) flats in the vice with the
air motor up.
2. Pull the exhaust valve poppets (26') into the valve
actuator (12). and clip off the top parts of the
poppets (shown with dotted lines in the Cutaway
View in Fig.
4).
3. Install the grommets (17')
in the actuator
(12).
place the inlet valve poppets (32') in the piston,
and thread the bottom valve nuts (21') onto the
inlet valve poppets until there are a few threads left
before'the threads run out.
NOTE:
I f you thread the valve nuts too far down
onto
the poppets, they will
run off of
the
threaded part of the poppets.
4.
Grease heavily and place the trip rod (31) in the
piston, place the actuator (12) in the yoke (13),
and place the well-greased actuator/yoke
assembly in the piston, with the trip rod going
through the center holes of the actuator and yoke
and the inlet valve poppets (32') going through the
grommets (17').
5 .
Thread the top valve nuts (21') onto the inlet valve
poppets (32') until one thread of the inlet valve
poppets is exposed above the valve nuts.
6.
Install the toggle pins (15) in the yoke (13), place
the toggle arm (23) ends of the toggle assembly
(16)
ends of the toggle assembly into the lugs
(L).
(M)
onto the toggle pins, and snap the pivot pin
12
308-485
7. Measuring with the gauge (Part No.171-818).
create 0.145 in. (3.7 rnm) of clearance between
the inlet valve poppets (32') and the piston seat
when the inlet valve is open. See the Cutaway
View Fig.
4.
NOTE Adjust the distance between the inlet valve
poppets and the piston seat by turning the
top valve nuts (21').
8. Tighten the bottom valve nuts (21') securely by
hand.
9. Align the holes in the valve nuts (21') and the slots
drop the lock wires (22') through the holes in the
on the tops of the inlet valve poppets (32'), and
valve nuts and into the slots in the inlet valve
poppets. Pull the lock wires down tightly, and
pulled back out of the holes.
bend the ends with pliers so that they cannot be
10. Grease and install the new O-rings (19' and 20')
on the piston assembly (27) and in the groove in
the air motor base (28).
11. Grease and reinstall the vee block seal
(lot) in
the groove in the air motor base
(28).
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