Replacing The Seal On The Drain Valve; Adjusting The 3-Way Valve - Hardi Mercury Series Instruction Book

6 - Maintenance
Re-lubrication after assembly
After disassembling the pump (diaphragm renewal, etc.) the pump
MUST be lubricated with 200 g grease into each lubrication point.
Hardi pump grease cartridge (400g): Item no. 28164600
Overhaul Kit
Pump model: 364 and 464.
Diaphragm pump overhaul kit (valves, seals, diaphragms etc.) can be
ordered. Detect the pump model - the overhaul kit can be ordered by
your local dealer.
Model 364: Item no. 75585900. Model 464: Item no. 75586000.

Replacing the seal on the drain valve

If the drain valve leaks, the seal and the seat can be replaced as follows:
1. Make sure that the tank is empty and clean.
2. The valve must be closed and the lever loose.
3. Remove the U-clip A and pull the connection part B. Now the
whole valve can be removed.
4. Check the condition and wear of the cord and the valve C, replace
the seal D and reassemble.
5. Grease all o-rings F before assembling.
6. Fit the U-clip A again.
€
DANGER! Do not enter the tank – the parts can be replaced from
outside the tank!
±
WARNING! Use a protective face mask when disassembling the
drain valve!

Adjusting the 3-way valve

The 3-way valve can be adjusted if it is too tight or too loose (liquid
loss). It is correctly adjusted when the valve handle can be turned
using one hand only.
To ease operation clean the mating faces between ball (B) and the
seat (A) of the valve.
Grease the valve every time you dismantle it for cleaning. This will
extend the service life of ball and seat.
96
A B