Pulsafeeder Pulsa Series Pulsamatic Controls - Manual (Page 18)

15
Models 7660 and 8480
Remove the housing pin flange bolts and thread them into the tapped holes in the flange.
Tighten all bolts equally to remove the pins.
7. Pull the housing assembly (#540) rearward until the cross head wrist pin (#550) is exposed.
Loosen the set screw (#549) located on the rear of the crosshead (#551), and slide the wrist pin
out. Complete removal of the housing assembly is now possible.
8. If a new crosshead is to be used, the existing crosshead can be left on the front connecting rod
(#353) and the piston rod unscrewed from the crosshead by placing a wrench on the front
connecting rod and the piston rod. One some models it may be necessary to remove the reagent
and pump head assemblies in order to remove the piston from the crosshead. If the head
assemblies must be removed, refer to the pump “Installation, Operation, and Maintenance
Instructions” for proper repriming instructions, etc. The pump head assemblies are held on to
the gearbox by two socket head capscrews located at the 3:00 and 9:00 positions inside the
gearbox.
Installation of the PULSAmatic Control Assembly
1. Adjust the new oscillating housing assembly (#540) to zero stroke. This is done by turning the
miter gear (#357) on the top of the housing assembly until the sliding block (#352) is all the
way to the top.
2. Position the new housing assembly in the gearbox.
3. Connect the front connecting rod (#353) into the existing cross head (#551). Ensure that the
wrist pin (#550) is centered so that it does not protrude out the sides of the cross head. Secure
with the set screw (#549).
OR
4. Attach the rear connecting rod onto the housing assembly.
5. Ensure that the pivot pin gaskets are in good condition. Apply a thin coat of sealant.
6. Align the housing to the pivot pin holes and install the pins (#547). On the 7120 and the 7440
pumps, make sure the small reliefs machined into the pins are positioned directly under the set
screw holes.
7. Secure by tightening set screws (#546) or flange bolts depending on the model.
8. Adjust the handwheel (#501) on the cover until the stroke indicator (#503) reads 000.
9. Lightly grease the drive shaft (Item #531, Figure 8 or 9) in the diamond groove area.
10. On non-explosion proof models, install the drive shaft assembly onto the housing cap (#358).
Hand-tighten the slotted nut (#535), loosen 1 ½ turn to the nearest hole-slot alignment, and
insert cotter pin (#539). Assembly cover assembly to pump by carefully threading the drive
shaft assembly onto the PULSAmatic control while lowering the cover into place.
On explosion proof models, the diamond shaft is retained in the PULSAmatic unit and does not
come out so the drive shaft assembly must be fed into the housing cap as the cover assembly is
lowered onto the pump. The slotted nut (#535) should be adjusted as above. Access to this nut
is provided through small subcover (#529A).
11. Fasten cover to the gearbox making sure cover gaskets (#526B) are positioned properly.
Refer to the “Installation” section for more detailed set-up and wiring information.