General Pump T16A-18A-20A-22A - Manual (Page 13)

2.2.2 Reassembling the Head - Valve Units
GENERAL PUMP
A member of the Interpump Group
KT16A/18A/20A/22A SERIES
Page 13
Pay particular attention to the conditions of the various components and replace if necessary, and at
the intervals indicated in the “Preventative Maintenance” table in chapter 11 of the use and
maintenance manual. At every valve inspecting, replace all O-rings and all anti-extrusion rings both
in the valve groups and on the valve plugs.
Before repositioning the valve unit, thoroughly clean and dry the relative seats in the head as
indicated in fig. 25.
Ref 300942 Rev.A
03-14
To reassemble the various components, follow the reverse operations listed above as described in point
2.2.1, taking particular care to:
1. Do not invert the suction springs with the previously disassembled outlet springs (fig. 26,
27). On pumps KT20A and T22A, take special care not to invert the suction springs with the
previously disassembled outlet springs:
a) “White” suction spring
b) “Black” outlet spring