Pulsafeeder PULSAmatic 7120, Installation, Operation, & Maintenance Instruction

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5. Remove the rear connecting rod cotter pin (#545) and wrist pin (#544).
6. Remove the housing pivot pins (#547).
Models 7120 and 7440
Remove the retainer set screws (#546) located directly above the housing pins in the
opt surface of the gearbox.
NOTE: If slight heat is applied to the pivot pins to loosen paint, or sealant, ensure that
no cleaning or combustible fumes or materials are present.
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.