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309280 19
Service
11. Carefully back away the ball screw (4) from the
mounting plate.
CAUTION
Be sure to support ball unit and keep it level as ball
unit is backed away from mounting plate. Failure to
do so can result in damage to the screw and unit.
12. Remove the four screws and washers (21, 57)
holding the shafts (17) on. Use wrench to hold flats
of shafts to keep shafts from turning.
Bearing (19) replacement
NOTE:
If you are replacing one or more bearings (19)
you need only remove the bolt holding the shaft (17)
needing the replacement bearing. To replace bearings:
a.
Remove shaft (17) from ball screw mounting
plate (3).
b.
Slide off damaged bearing assembly from
shaft (17) and linear bearing bracket (15).
c.
Remove either top or bottom retaining clip (24)
from the bearing assembly.
d.
Press the bearing (19) out of the linear bearing
sleeve (18) and press new bearing (19) into
bearing sleeve.
NOTE:
no lubrication is necessary for the bearing.
e.
Replace retaining ring (34).
f.
Slide new bearing assembly onto shaft (17)
and linear bearing bracket (15).
g.
Replace shaft (17) onto ball screw mounting
plate (13). No further disassembly is neces-
sary.
Disassembly (continued)
13. Remove the four shafts (17) and bearing assem-
blies.
14. Loosen the two recessed set screws (36) on the
linear bearing bracket (15).
15. Turn linear bearing bracket (15) counter clockwise
and remove it from the ball screw shaft.
NOTE:
You may have to hold onto ball screw threads
with a cloth and wrench when removing the linear
bearing. Be careful not to damage ball screw threads.
16. Remove ball screw housing from unit.
Reassembly
CAUTION
Be sure to support ball unit and keep it level as ball
unit is replaced. Failure to do so can result in dam-
age to the screw and unit.
NOTE:
Ensure ball screw is at the upper third of the
stroke before beginning this procedure. Partially insert
ball screw through mounting plate to allow access for
replacing shafts and bolts.
1.
Place the linear bearing bracket (15) onto shaft.
Spin bearing bracket down on to ball screw shaft
to secure in place. Position the bracket so that two
holes of the linear bearing bracket (15) face to-
wards the front.
2.
Tighten two set screws (36).
3.
Position bearing assemblies on shafts (17) and
into linear bearing mounting bracket (15).
4.
Replace shafts (17) with bearings onto ball screw
mounting plate (3). Make sure flats on rods are
located towards the ball screw.
5.
Replace the four screws and washers (21, 57)
holding the shafts (17) onto the mounting plate and
torque bolts to 45 to 50 ft lbs.
6.
Carefully slide ball screw assembly back onto
mounting plate (3). Replace four bolts and wash-
ers (27, 28) and torque bolts to 60 ft lbs.
7.
Place the pump mount plate (2) carefully over the
four shafts (17). Make sure they fit into the spot
face for each shaft.
8.
Secure plate (2) to dispenser mount bracket (1)
using two bolts and washers (26, 28). Torque to
45 – 50 ft lbs.
9.
Replace nut (16) onto ball screw shaft and torque
nut to 30 ft. lbs.
10. Replace the shot meter assembly, see Service,
Shot Meter Assembly / Piston Rod Seal.
11. If unit was moved to another location for repair,
reattach unit to the Ultra–Flo dispenser support
(22) by replacing the four bolts (43, 44, 45) (two on
each side) holding the unit to the mounting plate.
12. Reconnect hoses, transducer, proximity switches,
and other attachments.