Repair
18
308155U
NOTE:
If you removed or turned the next nut (103),
check the ball travel. It should be 0.2 inches (5 mm), as
shown in F
IG
. 14.
2. To reconnect the reciprocator and pump, screw the
connecting rod (117) into the displacement rod (34).
Install the cotter pin (118). Make sure the o-ring
(119) in the bottom of the adapter (43) is in good
condition. Push the cylinder up into the adapter, and
engage the threads. Screw in he pump, using a
strap wrench for the final tightening. (F
IG
. 14)
3. Reinstall the intake valve assembly by doing the
reverse of Step 6 of the section Displacement
Pump.
Displacement Pump Repair
(Model 237653)
Disassembly
When disassembling the pump, lay out all removed
parts in sequence to ease reassembly.
NOTE:
Clean all parts thoroughly when disassembling.
Check them carefully for damage or wear, replacing
parts as needed.
1. Remove the displacement pump from the reciproca-
tor. See page12 for instructions on removing.
2. Unscrew the locking ring (17) from the cylinder (11).
Remove the intake valve housing (13).
3. Remove the o-ring (12), ball stop pin (5), ball guide
(22), and ball (2) from the intake valve housing (13).
4. Loosen the packing nut (15). Push the displacement
rod (7) down as far as possible, then pull it out the
bottom of the cylinder (11).
5. Secure the flats of the piston (14) in a vise. Using a
wrench on the flats of the piston mounting stud (28),
screw the piston stud off the piston.
6. Remove the piston packings (25, 26), glands (24,
27), shim (29), and washer (23).
7. Remove the packing nut (15), throat packings (9,19)
and glands (6,8) from the outlet housing (16).
8. Inspect all parts for damage. Clean all parts and
threads with a compatible solvent before reassem-
bling. Inspect the polished surfaces of the displace-
ment rod (7) and cylinder (11) for scratches, scoring
or other damage, which can cause premature pack-
ing wear and leaking. To check, run a finger over
the surface or hold the part up to the light at an
angle. Be sure the ball seats of the piston (14) and
intake valve housing (13) are not chipped or nicked.
Replace any worn or damaged parts.
Reassembly
1. Lubricate the throat packings and install them in the
outlet housing (16) one at a time as follows,
with the
lips of the v-packings facing down:
the male gland
(6), two neoprene v-packings (9), one UHMWPE
v-packing (19), and the female gland (8). Apply
thread lubricant and install the packing nut (15)
loosely.
2. Lubricate the piston packings and install them onto
the piston stud (14) one at a time in the following
order,
with the lips of the v-packings facing up:
the
female gland (27), one UHMWPE v-packing (25),
one neoprene v-packing (26), one UHMWPE
v-packing (25), the male gland (24), the shim (30),
and the washer (23).
3. Place the flats of the displacement rod (7) in a vise
and screw the piston stud (14) onto the displace-
ment rod. Torque to 50 to 70 ft-lbs (68 to 95 N.m).
4. Slide the ball stop pin (10) into the desired set of
holes and secure with the new cotter pins (1). Install
the piston ball (2) in the piston mounting stud.
5. Screw the piston stud (14) onto the piston mounting
stud (28). Torque to 50 to 70 ft-lbs (68 to 95 N.m).
F
IG
. 15
117
104
168085
guide collar
108
Содержание Dyna-Star 224741
Страница 27: ...Notes 308155U 27 Notes ...
