Danfoss PAHT 256-308 Instruction - Page 12

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Instruction

Changing pistons

Disassembling and assembling PAHT and PAHT G 256-308

Note : It is essential that the pump is serviced

in conditions of absolute cleanliness.

Tools needed:

•

13 mm combination wrench

•

6 mm allen key

•

Tool set 180B4347

6.1 Disassembling

1. Disconnect the pump from the rest of the

system.

WARNING:

Never unscrew the 4 screws marked

with coloured sealer.

3. Mount the guide bolt in the top hole.

180R9268 / 521B1236 / DKCFN.PI.011.B3.02 / 01.2015

2. Loosen all screws on the pump except the

three screws as shown in the picture

above.

Note: There is still water inside the

pump.

4. Unscrew the remaining three screws by

using a combination wrench to turn each

screw a couple of rounds at a time so

the flange is removed as straight outward

as possible.

Stop for

retainer ball