307132
21
Service
Reassembly
(See Fig. 6)
1.
Three Displacement Pump Models Only
Slide the center pump’s displacement rod (E)
through the retaining plate (12), retaining ring (15),
and washer (14). Thread the displacement rod (E)
into the yoke (13) by turning the complete cylinder.
Use the wrench on the flats of the displacement
rod for final tightening. Push the cylinder up into
place in the retaining and install the retaining ring.
2.
Insert the two outer displacement rods (E) through
the retaining plate (12), retaining rings (15), and
washers (14). Thread the displacement rods into
the yoke (13) by turning the complete cylinder.
Install the locknuts (6) loosely on the displacement
rods. Push the cylinders up into place in the retain-
ing rings.
3.
Move the air motor to the bottom of its stroke.
Check the play of the air motor yoke at each dis-
placement rod. With the displacement rods cen-
tered, tighten the locknuts (6) securely.
4.
After mounting the displacement pumps to the air
motor yoke, use a 3/8 in. hex key wrench to tight-
en the piston studs securely. Tighten the throat
packing nut just enough to prevent leakage, no
tighter.
5.
Install the intake valve housing in the cylinder and
torque it to 30–35 ft-lb (41–46 N
m).
Summary of Contents for BULLDOG HYDRA-CAT 208958
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