Changing Pistons - Danfoss PAHT Series Instruction

Instruction
6.

Changing pistons

12
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