DRESSTA TD-25M EXTRA, Service Manual

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SECTION 10A
PUMPS
Page 12
TD-25M EXTRA DRESSTA
EQUIPMENT PUMP
7. CARTRIDGE KITS
NOTE: Both cartridge kits are similar in appearance with the only differences being in size
and capacity. Unless otherwise notated, all reference numbers are a referral to Fig. 10A.7.
Service the two cartridge kits one at a time.
1. Remove back up ring (3 or 30), O-ring (4 or 29) and square seal ring (5 or 28) from outlet
support plate (7 or 26). O-ring (6 or 27) will stay with respective covers.
2. Scribe a line across outer surface of cartridge kit (Fig. 10A.16). Scribe marking will provide
a reference for parts during reassembly. Position cartridge on a flat surface (outlet support
plate 7 or 26 down) and remove mounting bolts (15 or 18).
NOTE: Do not slide outlet flex side plates (9 or 22) across rotor ring (12 or 25) and rotor (10 or 23).
Burrs on ring or rotor can cause deep scratches in soft bronze surface.
3. Slide inlet support plate (13 or 20) and seal packs (8 or 21) off of cartridge. DO NOT allow inlet
flex side plates (9 or 22) to slide with support plate. Refer to Fig. 10A.17. Raise inlet flex side
plate (Fig. 10A.18) just enough to lift up and away without sliding.
Fig. 10A.16. Scribing Cartridge Fig. 10A.17. Inlet Support Plate
4. Place a small clean piece of wood over exposed rotor ring (12 or 25) and rotor (10 or 23).
Reverse position of cartridge (Fig. 10A.19). Slide outlet support plate (7 or 26) and seal pack
(8 or 21) off of outlet flex side plate (9 or 22). DO NOT allow outlet flex side plate to move
across rotor ring or rotor. Move outlet flex side plate off center (Fig. 10A.24) just enough to lift
up and away without sliding.