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18 309280
Service
7.
Replace lower spacer seal (8).
NOTE:
lower spacer should be even with lip on hous-
ing (5) if properly assembled.
8.
Grease top of piston rod (7) and press to insert
into meter housing (5).
NOTE:
insert leading edge of rod from bottom towards
top of housing to lessen chance of damaging packing
seal lips (10).
9.
Check condition of o–ring (25) in the linear bearing
bracket (15) and replace if necessary. Grease
o–ring (25). Insert piston rod (7) through the pump
mounting plate (2) and down into the linear bearing
bracket (15).
10. Insert pin (82) through the bearing bracket (15)
and piston rod (7).
11. Rotate housing (5) for desired inlet and outlet port
positioning. Press down flush against pump
mounting plate (2).
12. Replace split rings (72).
NOTE:
Split rings
must
be installed with curved edge
down. Bolt holes can be aligned as desired.
13. Replace the eight cap head screws and washers
(67, 83). Torque screws to 45–50 ft lbs. When
replacing the four bolts for shafts (17) use wrench
on flats located towards the bottom of the shaft to
prevent shaft from turning.
14. Check o–ring (14) on meter cylinder (6) and re-
place if necessary.
15. Grease o–ring and meter cylinder threads.
16. Replace (screw) cylinder (6) on housing (5). Make
sure cylinder is bottomed into housing. Snug up
with wrench.
17. Replace the meter guard (66) and six hex screws,
grommets, and washers (58, 70, 71) holding the
meter guard in place.
18. If unit was moved to another location for repair, re
attach unit to the dispenser support (22) by repla-
cing the four cap screws, washers, and nuts (43,
44, 45) (two on each side) holding the unit to the
dispenser support.
19. Reconnect hoses, transducer, proximity switches,
and other attachments.
Ball Screw Repair and Bearing Replacement
Ball Screw Service is necessary when bearings (19)
need replacement or the ball screw (4) needs repair or
replacement.
Refer to the Parts information on page 20 and 22 when
performing the following procedure to disassemble and
assemble the shot meter.
NOTE:
Ensure ball screw is at the upper third of the
stroke before beginning this procedure. Bearing re-
placement requires removal of ball screw.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page 8.
Disassembly
1.
Relieve the fluid pressure.
2.
Purge the system as completely as possible, and
disconnect hoses, transducer, and other attach-
ments.
3.
Shut off electrical power to Ultra–Flo unit.
4.
Disconnect motor electrical connections.
5.
If unit will be moved to another location for repair,
remove the unit from the dispenser support (22) by
removing the four bolts, washers and nuts (43, 44,
45) (two on each side) that hold the unit on to the
dispenser support.
NOTE:
This step is not necessary if the unit will be
repaired at installed location.
6.
Remove the shot meter assembly, see Service,
Shot Meter Assembly / Piston Rod Seal .
7.
Remove the motor from the ball screw assembly.
8.
Remove the nut (16) holding the ball screw shaft
on the linear bearing bracket (15).
9.
Remove the two bolts and washers (26, 28) hold-
ing the pump mounting plate (2) on the dispenser
mounting bracket (1), and slide plate off.
10. Remove the four socket head bolts and washers
(27, 28) holding the ball screw (4) onto the mount-
ing plate (3).