SECTION 7
HIGH PRESSURE WATER
Nov 2002
p. 7-4
05126826
7.2.2 HP Sealing Head--Remove from/Install in Waterjet Pump
1. Remove low pressure and HP piping from sealing head using
procedure in Section 7.2.1.
2. With pin spanner wrench located on head nut to turn
counterclockwise, and cylinder wrench installed on cylinder to hold
in opposite direction of rotation; break the head nut loose. Tapping
the pin spanner wrench with plastic hammer may be required.
3. Unscrew head nut until it is flush with the water inlet groove on the
sealing head. With a screwdriver in the groove, and supported by
the head nut, gently pry the sealing head out as far as possible;
continue repeating the process until the sealing head is loose from
the cylinder. Continue unscrewing the head nut and remove nut
from HP cylinder.
NOTE
Parts are heavy; avoid dropping.
(1) Sealing Head (2) Inlet Poppet (3) Gland Nut
(4) Ball Seat (5) Inlet Spring (6) Poppet
(7) Guide Pin (8) Poppet Retainer (9) Discharge Spring
(10) O-Ring
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