Haskel 8 Serie Instructions De Fonctionnement Et D'entretien page 7

Disassemble equipment only to the extent required to repair or replace defective parts. Do not disturb
unaffected component parts or plumbing connections.
NOTE: Detailed assembly drawings particular to your specific model have been included as a part of
these maintenance instructions. Consider these maintenance instructions as general information while
the assembly drawings reflect detail information, directly related to your particular drive/pump unit.
Certain assemblies, rarely requiring disassembly for servicing, have been assembled with Loctite CV
(Blue) No. 242, as a locking compound. (Refer to NOTES column in assembly drawing.) If disassembly of
these parts is essential, they should be carefully cleaned and then reassembled using Loctite CV. Use
care to avoid getting compound into other joints or moving parts.
It is good maintenance practice to replace bearings, seals, o-rings and backup rings (refer to NOTES
column on applicable assembly drawing for seal kit (s) available) whenever equipment is opened for part
inspection and/or replacement.
Air (or Gas) Drive Section and Liquid Pump Section
Parts removed for inspection should be washed in an aqueous based industrial cleaner, free of V.O.C.,
such as Blue Gold or equivalent. Avoid use of Trichlorethylene, Perchlorethylene, etc. Such cleaners will
damage seals and finish on air barrel and end caps. Inspect moving parts for evidence of wear (scoring or
scratches) due to foreign material. Inspect all threaded parts for crossed or damaged threads. Replace
part if thread damage exceeds 50 percent of one thread. If less than 50 percent, chase threads with
appropriate tap or die.
5.2 Cycling Valve Assembly
While continually referring to your detailed assembly drawing, disassemble cycling valve assembly in the
following manner:
5.2.1 Note p/n 57375 large slotted retaining screw locked in place with small p/n 58154 set screw. Loosen
set screw. Remove retaining screw.
5.2.2 Grasp hex plug and carefully pull pilot piston
assembly with cap from valve body. (Ref. Fig. 2.)
Remove boss o-ring sealed hex plug. Push shaft out
of the cap to reveal o-ring on end of shaft. (Ref. Fig.
3.)
lnspect all static and dynamic seals and replace any
that are damaged, worn or swollen. (If any special
tools are required, it will be noted on the detailed
drawing.)
8" Drive Liquid Pumps • OM-LP-800F
Figure 2. Cycling valve cap with pilot
piston
Figure 3. Pilot shaft end seal
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