Pfeiffer Duo 1.5A Repair


 

A pfeiffer duo 1.5A oil sealed pump was dismantled and serviced with a minor service kit.

This follows the procedures in:

 

Pfeiffer Duo 1.5A (3/6/2014)

As purchased the sight glass and shaft seal leaked oil.

 

Pfeiffer Duo 1.5A (3/6/2014)

Approximate placement locations of the turbo pump and controller that will be added

 

Pfeiffer Duo 1.5A (3/6/2014)

How the original unit was designed

 
 

Pfeiffer Duo 1.5A (3/6/2014)

Rebuild Process

 

Pfeiffer Duo 1.5A (3/6/2014)

Minor rebuild kit is $45

Pfeiffer 080010 KIT,REPAIR,UNO/DUO 1.5A

 

Pfeiffer Duo 1.5A (3/6/2014)

Vane springs

 

Pfeiffer Duo 1.5A (3/6/2014)

Oil level glass

 

Pfeiffer Duo 1.5A (3/6/2014)

O-ring and radial shaft seal

 

Pfeiffer Duo 1.5A (3/6/2014)

hold down screws removed

 

Pfeiffer Duo 1.5A (3/6/2014)

clamps and o-rings removed from ports

 

Pfeiffer Duo 1.5A (3/6/2014)

pump removed from frame

 

Pfeiffer Duo 1.5A (3/6/2014)

vibration isolator springs

 

Pfeiffer Duo 1.5A (3/6/2014)

inlet and exhaust ports

 

Pfeiffer Duo 1.5A (3/6/2014)

output of generator

 

Pfeiffer Duo 1.5A (3/6/2014)

rectified output to solenoid valve

 

Pfeiffer Duo 1.5A (3/6/2014)

anti-suck back valve on inlet port

 

Pfeiffer Duo 1.5A (3/6/2014)

valve removed

 

Pfeiffer Duo 1.5A (3/6/2014)

valve intake

 

Pfeiffer Duo 1.5A (3/6/2014)

oil drained

 

Pfeiffer Duo 1.5A (3/6/2014)

o-rings on oil fill and drain plugs replaced

 

Pfeiffer Duo 1.5A (3/6/2014)

sight glass removed

 

Pfeiffer Duo 1.5A (3/6/2014)

sight glass removed

 

Pfeiffer Duo 1.5A (3/6/2014)

new and old sight glass

 

Pfeiffer Duo 1.5A (3/6/2014)

sight glass replaced

 

Pfeiffer Duo 1.5A (3/6/2014)

inlet and exhaust o-rings replaced

 

Pfeiffer Duo 1.5A (3/6/2014)

solenoid valve to actuate anti-suck back valve

 

Pfeiffer Duo 1.5A (3/6/2014)

solenoid coil

 

Pfeiffer Duo 1.5A (3/6/2014)

wiring feed through

 

Pfeiffer Duo 1.5A (3/6/2014)

solenoid intake

 

Pfeiffer Duo 1.5A (3/6/2014)

solenoid wires removed, removing intake adapter

 

Pfeiffer Duo 1.5A (3/6/2014)

valve core retainer nut

 

Pfeiffer Duo 1.5A (3/6/2014)

valve core removed

 

Pfeiffer Duo 1.5A (3/6/2014)

valve coil

 

Pfeiffer Duo 1.5A (3/6/2014)

unscrew with hand

 

Pfeiffer Duo 1.5A (3/6/2014)

valve removed, do not attempt to remove hex fitting on bulkhead, it is glued in place

 

Pfeiffer Duo 1.5A (3/6/2014)

valve parts

 

Pfeiffer Duo 1.5A (3/6/2014)

valve cleaned and o-rings replaced

 

Pfeiffer Duo 1.5A (3/6/2014)

pump stages

 

Pfeiffer Duo 1.5A (3/6/2014)

shaft coupler

 

Pfeiffer Duo 1.5A (3/6/2014)

stage 2 drive

 

Pfeiffer Duo 1.5A (3/6/2014)

with shaft coupler

 

Pfeiffer Duo 1.5A (3/6/2014)

oil system air admit system

 

Pfeiffer Duo 1.5A (3/6/2014)

removed

 

Pfeiffer Duo 1.5A (3/6/2014)

should have clear hole down center

 

Pfeiffer Duo 1.5A (3/6/2014)

o-ring replaced

 

Pfeiffer Duo 1.5A (3/6/2014)

stages separated

 

Pfeiffer Duo 1.5A (3/6/2014)

first stage

 

Pfeiffer Duo 1.5A (3/6/2014)

vanes

 

Pfeiffer Duo 1.5A (3/6/2014)

casing

 

Pfeiffer Duo 1.5A (3/6/2014)

new and old springs

 

Pfeiffer Duo 1.5A (3/6/2014)

rotor removed

 

Pfeiffer Duo 1.5A (3/6/2014)

second stage exhaust

 

Pfeiffer Duo 1.5A (3/6/2014)

exhaust valve

 

Pfeiffer Duo 1.5A (3/6/2014)

exhaust valve plunger

 

Pfeiffer Duo 1.5A (3/6/2014)

exhaust valve plunger

 

Pfeiffer Duo 1.5A (3/6/2014)

second / first stage coupler

 

Pfeiffer Duo 1.5A (3/6/2014)

second stage interior

 

Pfeiffer Duo 1.5A (3/6/2014)

vanes removed

 

Pfeiffer Duo 1.5A (3/6/2014)

removing motor

 

Pfeiffer Duo 1.5A (3/6/2014)

stand on pump face and pull motor straight up

 

Pfeiffer Duo 1.5A (3/6/2014)

generator and radial shaft seal

 

Pfeiffer Duo 1.5A (3/6/2014)

generator magnet and coupler

 

Pfeiffer Duo 1.5A (3/6/2014)

generator and radial seal

 

Pfeiffer Duo 1.5A (3/6/2014)

generator and radial seal

seal is recessed about 1/32" past the interior aluminum face

 

Pfeiffer Duo 1.5A (3/6/2014)

use a c cell and a hammer to remove the radial seal

 

Pfeiffer Duo 1.5A (3/6/2014)

seal removed

 

Pfeiffer Duo 1.5A (3/6/2014)

radial seal insertion system

machine a plastic rod to 1.095" OD and drill a 1/4 clearance hole in the center

 

Pfeiffer Duo 1.5A (3/6/2014)

bolt goes through aluminum plate

 

Pfeiffer Duo 1.5A (3/6/2014)

rod pushes new radial seal into pump

 

Pfeiffer Duo 1.5A (3/6/2014)

radial seal installed

 

Pfeiffer Duo 1.5A (3/6/2014)

motor reinstalled

 

Pfeiffer Duo 1.5A (3/6/2014)

base plate removed

 

Pfeiffer Duo 1.5A (3/6/2014)

generator wiring

 

Pfeiffer Duo 1.5A (3/6/2014)

generator wiring

 

Pfeiffer Duo 1.5A (3/6/2014)

pump stages reinstalled

 

Pfeiffer Duo 1.5A (3/6/2014)

case gasket

 

Pfeiffer Duo 1.5A (3/6/2014)

reservoir reinstalled

 

Pfeiffer Duo 1.5A (3/6/2014)

pump mounted on frame

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

Pfeiffer Duo 1.5A (3/6/2014)

 

 
 

 

 


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