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306531 15
Air Motor Service
6. Install the bottom adjusting nuts (33) on the poppet
valve stems (45
†) and screw the stems into the
grommets (32†). Screw the top nuts (33†) on the
stems. Before installing the lockwires (34†) in the
adjusting nuts, use the gauge 171818 to adjust
the transfer valve so there is 0.145 in. (3.7 mm)
clearance between the poppets and the seat when
it is open. See Fig. 8.
WARNING
To reduce the risk of pinching or amputating your
fingers, always keep fingers clear of the toggle
assemblies (M).
7. Install the springs (31) and pivot pins (30) on the
toggle arms (37). Snap the toggles to the up
position. Refer to Fig. 7.
8. Carefully lower the cylinder (51) over the piston
(59) and onto the base (55). Secure with the six
screws (25).
9. Manually push on the piston rod (41) to move the
piston (59) up as far as it will go. Grip the trip rod
(54) with padded pliers and screw the cylinder cap
nut (47) onto the trip rod. Pull the piston rod (41) to
move the piston down. Be sure the o-ring (27) is in
place at the top of the cylinder (51), and screw the
cap nut into the cylinder.
10. Screw the connecting rod (10) into the piston rod
(41) and secure with the pin (4*). Manually push
on the piston rod (41) to move the piston (59) up
as far as it will go. Screw the riser tube (12) into
the base (55).
11. Use a 1/4” diameter rod, spanner wrench, or
torque wrench to tighten the packing nut (42).
Tighten snugly and then tighten an additional 1/2
turn (20–25 ft–lbs).
12. Install the muffler plate (20 or 40) using the six
screws (24).
13. Connect an air hose and run the pump slowly
[about 30 psi (2.1 bar)] to see that it operates
smoothly.
14. Remount the pump and reconnect the ground wire.