Service
306518ZAC 11
20. Grip the trip rod (11) with padded pliers, screw the
cylinder cap (29) onto the trip rod, push the cylinder
cap nut down, and screw it into the top of the cylin-
der.
21. Place the piston ball (109) in the displacement rod
(8).
22. Clean the threads of the fluid piston (110), apply
Loctite
®
to the threads, install the new packing
o-ring (104) on the fluid piston, and thread the fluid
piston onto the displacement rod (8).
23. Clamp the flats of the fluid piston (11) in a vise, and
torque the displacement rod (8) to the piston to 40 to
60 ft-lbs (54 to 81 N.m).
24. Clamp the air motor base (5) in a vise horizontally
by closing the vise jaws on the flange.
25. Use a strap wrench to screw the displacement
pump cylinder (105) to the air motor base (5), and
torque to 95 to 105 ft-lbs (129 to 142 N.m).
26. Before remounting the pump, connect an air hose
and run the air motor slowly, starting with just
enough air pressure to make the air motor run, and
make sure it operates smoothly.
27. Reconnect the ground wire before you resume regu-
lar pump operation.
NOTICE
Do not damage the plated surface of the trip rod (11).
Damaging the surface of the trip rod can result in
erratic air motor operation. Use the special padded
pliers to grasp the rod.
FIG. 4
2211
31*
30*
1*
30*
1*
2
5
1*
30*
12*
11
14
13
12*
30*
1*
16*
2
L
16*
Push toggles (M) in and then up.
Cut off tops of poppets as indicated by dotted lines.
Turn wires up.
0.145 in (3.7 mm) clearance between poppets (1) and seat when it is open.
