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Diaphragm Renewal
5. Loosen the diaphragm bolt (F).
6. Remove the upper diaphragm washer (G).
7. The diaphragm (H) may then be changed.
8. Remove the drain hole bolt (I) and check for dirt blockage in the
bottom of the pump.
9. Apply a small amount of pump grease on the lower diaphragm
washer surface (J), i.e. between the washer and diaphragm (H).
10. Reassemble the pump with the following torque settings.
• Diaphragm head bolts (B): 90 Nm.
• Diaphragm bolt (F): 90 Nm.
• Drain hole bolt (I): 50 Nm.
11. Refit the plastic covers (A).
÷
NOTE! The diaphragm bolt on 1000 RPM pumps must be secured
with a locking compound.
μ
ATTENTION! Before tightening the 4 bolts (B) for the head, the
diaphragm (H) must be positioned between centre and top to
ensure correct sealing between the pump housing and
diaphragm cover (C). Turn the crankshaft to check, if necessary.
Lubrication after Assembly
After disassembling the pump for diaphragm renewal, etc., you MUST
lubricate with 200 g grease into each lubrication point.
HARDI pump grease cartridge (400g): HARDI item no. 28164600
Overhaul Kit
Pump model: 464.
It is possible to order an overhaul kit for the diaphragm pump (valves,
seals, diaphragms etc.). Detect the pump model - order the overhaul kit
at the local dealer.
Model 464: HARDI item no. 75586000.
6 - Maintenance
H
I
C
A
200
A
F
G
J
H
200
161
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