General Pump SH - Manual (Page 10)

GENERAL PUMP
A member of the Interpump Group
SH SERIES
11.2 Fluid end maintenance
The fluid end does not require periodical maintenance.
Service operations are limited to valve inspection
and/or replacement, when necessary.
Remove the pump head. (Fig. 12)
When removing the head from the pump pay attention
to the valve seats (1, Fig 13) and the suction valve
poppets (2, Fig. 13) which may fall off the head. Check
the cooling system orifices of the head (see arrows) and
the relevant white tips (3, Fig. 3) for deposits or sediments
that may prevent cooling water from flowing through.
Loosen and remove the 8 head screws (1, Fig. 11).
Once removed take out the delivery valve guide with the
spring and valve poppet. AN M10 threaded bolt to be used
as a simple extractor would help the operation (see
Fig. 10).
In order to have access to the delivery valves loosen the
12 valve cover screws (1, Fig. 9) and remove the covers.
Remove the valve seats (1, Fig 14) from the head, check
them for wear and replace if necessary.
BEFORE REPOSITIONING THE VALVE UNITS BACK
IN PLACE CLEAN AND PERFECTLY DRY ALL VALVE
HOUSINGS INSIDE THE HEAD.
VALVE RINGS (2, FIG. 14) AND ALL O-RINGS SHOULD
BE REPLACED AT EVERY INSPECTION.
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