General Pump LH - Manual (Page 13)

Page 13
GENERAL PUMP
A member of the Interpump Group
LH SERIES
Disassemble the packing support from the cylinder by
means of a pin key (1, Fig. 20).
Remove the scraper (1, Fig. 21) and o-ring (2, Fig 22)
from the packing support.
In order to fit the new scraper in place, shape it manually
as shown in Fig. 22. VERY IMPORTANT! The scraper is
provided with an internal lip which performs the correct
scraping effect only if oriented toward the fluid end. See
window inside Fig. 22.
Before reassembling the pumping unit carefully clean
the pressure packing seat in the cylinders, fit in place the
packing ring (1, Fig. 23) and then the pressure packings
(2, Fig. 19). A little bit of grease helps sliding the
packings into the packing support.
Pressure packings and o-rings should always be
replaced at every disassembling of the pumping unit.