Pump Solutions Group Neptune Series 600 dia-PUMP MODELS 610 thru 647 - Manual (Page 15)

7.3.13 Remove control rod assembly with control rod attached (FIG. #0117 for all pumps; #1406 and #1408 for
Models 610 &615, #2306 and #2308 for Models 620 & 625, #3206 and #3208 for Models 635, 637 &
647) by turning counter clockwise until threads are disengaged, then pulling out.
7.3.14 Remove four sealing nut retaining screws (FIG. #0144).
7.3.15 Remove seal plate retainer (FIG. #0166) and sealing nut (FIG. #0115).
7.3.16 Remove seal plate (FIG. #1407 for Models 610 & 615, FIG #2307 for Models 620 & 625, FIG. #3207 for
Models 635, 637 & 647) using small brass hook to pry loose.
7.3.17 Replace control rod “O” ring (FIG. #1434 & 1465 [BACKUP RINGS] for Models 610 & 615, FIG. #2334
for Models 620 & 625, FIG #3234 for Models 635, 637 &647) and/or sealing plate “O” ring (FIG. #1433
for Models 610 & 615, FIG. #2333 for Models 620 & 625, FIG. #3233 for Models 635, 637 & 647).
7.3.18 When replacing sealing plate, take care so as to not shear the sealing plate “O” ring (FIG. #1433 for
Models 610 & 615, FIG. #2333 for Models 620 & 625, FIG. #3233 for Models 635, 637 & 647). Apply
grease to “O” ring before assembly.
7.3.19 Replace balance of parts and fill pump with hydraulic fluid per previous instructions.
7.3.20 Follow start-up procedure as if starting a new pump. Refer to Section II, Paragraph 1.0.9 and 6.0.
7.4.1 Removal of pump head and replacement of diaphragm.
7.4.11 Remove drain plug (FIG. #0130), and drain hydraulic fluid.
7.4.12 Remove long and short pump head bolts (FIG. #1438 and #1444 for Models 610 & 615, FIG. #2338 and
#2344 for Models 620 & 625, FIG. #3238 and #3244 for Models 635, 637 & 647). Lift pump head (FIG.
#1402 for Models 610 & 615, FIG. #2302 for Models 620 & 625, FIG. #3202 for Models 635, 637, &
647) away from pump.
7.4.13 Remove and examine Teflon diaphragm (FIG. #1410 for Models 610 & 615, FIG.#2310 for Models 620
& 625, FIG. #3210 for Models 635, 637 & 647). Remove and examine the liquid side diaphragm backup
plate (FIG. #1430 for Models 610 & 615, FIG. #2330 for Models 620 & 625, FIG. #3230 for Models 635,
637, & 647). Replace with new pump, if required. When replacing the Teflon diaphragm, be certain to
line it up properly with the sealing grooves.
7.4.14 To reassemble, reverse the above procedure. Reassemble is facilitated by laying the pump on its side.
Be certain to tighten all bolts evenly. Tighten to 100 ft. lbs.
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