Ediz. 010 - 06/2015
• Disconnect the pumping group by unscrewing the fastening
nut (wrench 45).
• Unscrew the pumping group from the housing.
You can now work easily as the pump casing has been freed.
• Grip the complete pump unit (P9) in a vice (P10) (as shown).
• Slacken the ring nut (P11) by two full turns using the special
pin (P12) supplied.
Turn anticlockwise as shown.
• Remove the pump unit (P13) from the foot valve (P14) as
shown.
Inspect the two parts separately.
PIT STOP MAINTENANCE
The replacement of upper and lower will take about 25 minutes.
REPLACING THE FOOT VALVE SEALS
• Replace the PTFE gasket (P15) located under the ball
housing (P16).
• Check that the surfaces of the ball housing (P16) and the
ball (P17) are not damaged. If necessary, replace them
both.
• Fit them again using the component sequence as shown.
• Use a 36 mm spanner to unscrew the pump unit as shown.
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JOLLY
21
P10
P9
P11
P12
P13
P14
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