Disassembly / Reassembly Operation
42
Upper valve and piston
seals
Unscrew and remove the upper valve (22), check the range
of the valve,
Take off and check the ball (16 )replace if necessary,
Remove, check and replace successively if necessary :
-
the first "M" washer (46),
-
the first seal (45),
-
the spacer (47),
-
the other 7 seals (45),
-
the second "M" washer (46),
-
the 9 spring washers (49).
Unscrew the coupling shaft (3),
Remove the piston (15),
Remove and check the seal (9) from the pump body,
replace it if necessary.
Nota : Check the upper valve seat. In the event of damage,
which is rectified after fitting, the ball must always be
replaced when the valve is replaced.
If the cylinder is damaged, the seals (37) must always be
replaced when the cylinder is replaced.
Upper gland seals
Unscrew and then remove the gland nut (5),
Remove, check, replace if necessary in the following order:
-
the "F" washer (6),
-
the 4 seals (11),
-
the "M" washer (12)
Nota : The piston is scratched. In this case, the part must be
changed and the seals (11) must be replaced.
