Form 3070-a – MP Pumps FLOMAX 30 SINGLE SEAL PUMPAK INSTRUCTION User Manual

Page 2

REBUILD:

Use the exploded parts view with these instructions

and note recommended replacement parts for the

rebuild process.

Disconnect and removed the pump end from the

driver.

Remove and replace the flapper assembly and

discharge gasket. Tighten the inlet and discharge

flange fasteners to 24 ft-lbs.

Remove 6 nuts from the adaptor and disassemble

the rotating assembly form the housing.

Inspect the wearplate for abrasive wear and

replace if necessary using new screws, gaskets

and acorn nuts.

Remove the seal seats from the adaptors and

discard.

Impellers are threaded onto a drive sleeve and

fastened with a jam nut.

Inspect the impeller for abrasive wear at the

edges of the machined surfaces. If they are not

well defined the impeller should be replaced.

REASSEMBLE:

Using a water-soluble lubricant, lubricate the

seal seat o-rings and seal housing bores. Install

new seal seats into the adaptors with the polished

sides of the seat up. Install by hand using your

thumbs to squarely locate the seats against the

shoulder of the adaptors. Wipe the seal faces dry

with a rag.

Place the impeller inside the pump housing.

Install the housing gasket over the housing studs

and position it on the housing gasket face.

Using a water-soluble lubricant, lubricate the

impeller sleeve and the seal rotary bellows inner

diameters.

Install the seal rotary (carbon face) tail first over

the sleeve to make contact with the spring.

Place housing gasket over the studs and install

the driver adaptor onto the pump assembly to

compress the seal spring. Tighten 6 nuts with

lockwashers to 28 ft-lbs. with a crosswise

pattern.

Slide the drive sleeve clamp assembly on the

sleeve.

Pull the clamp assembly and sleeve back out of

the pump and slide a shim inside the pump

discharge between the wearplate and impeller

vanes. Shim material thickness should be .02-

.03 inches.

The pump can now be installed to the driver as a

pumpak.

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Form 3070-A

11/03