Hitachi CHROMASTER 5160 Instruction Manual page 157

5.9 Parts Replacement for the Plunger Wash Mechanism
<Required Articles>
Hexagon wrench
Workshop tools
Double-end wrench
Flathead screwdriver
Receiving tray
Wash mechanism seal (P/N: 885-1884x 2)
Plunger seal(Pump seal)(P/N; 891-1213x 2)
Wash bottle
Ultrasonic cleaner
(1) Disconnect the inlet tube and outlet pipes (1)(2) from the
pump heads (Refer to 5.3 Replacement of Pump Seal).
(2) Loosen the hexagon screws alternately with a hex wrench
and remove them.
(3) Carefully pull out the pump head toward you with both
hands.
 When the plunger seal remains in the pump head,
replace it if needed (Refer to 5.3 Replacement of Pump
Seal).
 When the plunger seal remains in the plunger, replace it
when the wash mechanism plunger guide is removed.
Pump head
Spring washer
Hexagon screws
Hex wrench
5 - 20
(P/N: N315005, Size: B4)
(P/N: 810-1353)
(P/N: N311017, Size: 13/17)
(P/N: N330062)
*Replace it as necessary.
Guide
Wash mechanism plunger guide
Plunger wash mechanism