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10. Lubricate the parts with light water-proof grease.
Install the gland (138) v-packings (137) with the
lips facing down, bearing (139), back-up washer
(129), and flat packing (130) into the throat. Screw
the packing nut (132) loosely into the base. Slide
the piston rod (128) down through the packings
and lower the piston (118) onto the base. Be sure
that the o-rings (125 & 126) are in place.
11. Reinstall the transfer valve poppets (114†) on the
valve stems (115†). Pull the exhaust valve poppets
(122†) into the actuator (121) and clip off the top
part (shown with a dotted line in Fig. 3). Install the
transfer valve grommets (113†) in the valve actua-
tor. Reinstall the trip rod (103) in the
piston (118). Place the trip rod yoke (109) and
valve actuator (121) on the trip rod. Check that the
o-ring (123) is in place, and that the valve actuator
is supported by the spring clips (119)
12. Install bottom adjusting nuts (116†) on the valve
stems (115†) and screw the stems into the grom-
mets (113†). Screw the top nuts (116†) on the
stems. Before installing the lockwires (120†) in the
adjusting nuts, adjust the transfer valve so there is
a 0.145 in. (3.68 mm) clearance between the
poppets (114†) and the seats when they are open.
See Fig. 3. Adjustment gauge 171–818 is available
to measure this. Reinstall the springs (112) and
pivot pins (11) on the toggle arms (124) and snap
the toggles to the up position with a screwdriver.
WARNING
To reduce the risk of pinching or amputating your
fingers, always keep fingers clear of the toggle
assemblies.
109
111
Fig. 2
Service
112
120
116
F
13. Carefully lower the air motor cylinder (117) over
the piston (118) and onto the air motor base (104).
Secure with the six screws (107).
14. Manually push on the piston rod to move the
piston (118) up as far as it will go. Grip the trip
rod (103) with padded pliers and screw the cylinder
cap nut (141 or 142) onto the trip rod. Pull the
piston rod (128) to move the piston downward.
Check that the o-ring (108) is in place at the top of
the air motor cylinder (117), then screw the cylin-
der cap nut into the cylinder.
15. Screw the connecting rod (159 or 162) into the
piston rod (128) and secure with the pin (146).
Screw the riser tube (160 or 163) into the air motor
base (104).
16. Before putting the motor plates (127 & 135) back
on, tighten the throat packing nut (132) just snug –
do not overtighten. Before remounting the pump,
connect an air hose and run the pump slowly
(about 40 psi [3 bar]) to see that it operates
smoothly.
WARNING
Never operate the pump with the air motor warning
plate (135) or the identification plate (127) re-
moved. These plates enclose the piston, which
moves during operation, and help protect your
fingers from serious injury, including amputation.
17. If the grounding wire was disconnected before
service was begun, be sure to reconnect it before
operating the pump.
121
**122
**114
Fig. 3
116**
113**
0.145" (3.68 mm)
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Troubleshooting
