11
307679
Displacement Pump Service (Model 218554)
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 7.
Before You Start
1.
Repair Kit 223650 is available (see
Parts Lists
on
pages 19 and 21). For the best results, use all the
parts in the kit. Kit parts are marked with an aster-
isk, for example (204*).
2.
Have all the necessary repair parts on hand.
Recommended spare parts are marked with a
checkmark in the parts list on pages 18–21 (for
example, 201f
n
).
3.
Use a compatible solvent to clean parts. Inspect
parts for wear or damage and replace as needed.
4.
Flush the pump if possible. Stop the pump at the
bottom of its stroke. Follow the
Pressure Relief
Procedure Warning
on page 7.
5.
Disconnect the air and fluid hoses. Remove the
pump from its mounting. Clamp the pump in a
vise.
Servicing the Displacement Pump
Disassembly (See Fig. 2)
1.
Unscrew the air motor connecting ring. Lay the
pump on its side and rotate the displacement
pump until the ball on the connecting rod (212)
comes free of the socket in the air motor piston
rod. Separate the air motor from the displacement
pump. Clamp the displacement pump outlet hous-
ing (215) in a vise.
NOTE:
To service the air motor, refer to separate
manual 307851, supplied.
2.
Unscrew the intake valve housing (201c) from the
outer displacement cylinder (207). Remove the pin
(201e) and ball (201f
n
) from the valve housing
(201c). Screw the relief valve housing (201d) out
of the intake valve housing and remove the spring
(201b) and ball (201a). See Fig 2. Thoroughly
clean all the parts, inspect for wear or damage and
replace as necessary.
3.
Using wrenches on the flats of the upper piston rod
(211) and connecting rod (212), screw the con-
necting rod off the piston rod.
4.
Remove the packing retainer (213) and the pack-
ing (214). Remove the o–ring (208). Push down on
the upper piston rod (211), grasp the fluid piston
(202) and pull the piston and piston rod out
through the bottom of the pump. See Fig 2.
5.
Screw the fluid piston (202) out of the piston valve
housing (221) and remove the backup washer
(223), seal (204), and ball (222
n
). See Fig 2.
Thoroughly clean all the parts, inspect them for
wear or damage, and replace as necessary.
6.
Unscrew the lower piston rod (205) from the
displacement piston (217) and upper piston rod
(211). Remove the backup washer (220), and seal
(219). Thoroughly clean all the parts, inspect them
for wear or damage, and replace as necessary.
7.
Using a strap wrench, screw the bung adapter
(216) off of the pump outlet housing (215).
8.
Screw the outer displacement cylinder (207) and
inner displacement cylinder (206) off the pump
outlet housing (215). Check the inner surfaces of
each cylinder for scoring or damage by running a
finger over the surface or holding the part up to the
light at an angle. Replace as necessary.
9.
Screw the pump housing (210) out of the pump
outlet housing (215). Remove the o–rings (208 and
209).
Содержание 218556, Series C
Страница 10: ...10 307679 Notes ...
Страница 14: ...14 307679 Notes ...
Страница 25: ...25 307679 Notes ...
