Haskel 8AG Serie Instructions De Fonctionnement Et D'entretien page 11

Air Driven Gas Booster Compressor, 8" Drive AG Series • OM-12F
5.7.3 Remove end cap and/or retaining plate. Inspect O-ring and back up ring mounted inside end cap
and replace if damaged, worn or swollen.
5.7.4 Remove cooling sleeve (with attached muffler), high pressure gas barrel and static seal O-rings.
Inspect O-rings and replace if damaged, worn or swollen.
5.7.5 The remainder of disassembly depends upon the parts make up shown on your particular assembly
drawing. The extent of disassembly should be determined by the initial reasons for disassembly; that is
end cap seal leakage, gas piston seal leakage, or air drive rod seal leakage. O-rings, seals and backup
rings are the most likely parts requiring replacement and are coded for kit replacement.
5.7.6 Clean all parts (Ref. Paragraph 5.1) and inspect for nicked, grooved, scratched or scored wear
surfaces and believille spring deformation.
5.7.7 Replace all parts that are damaged. Inspect high pressure gas barrel bore with a strong light. It
must be "mirror smooth". However, if only slightly scratched it may be salvaged with a light hone.
NOTE: DO NOT apply a lubricant of any kind to bearings, seals, O-rings, backup rings or inner surface of
gas barrel.
5.7.8 Reassemble gas piston parts in reverse order of disassembly. Final tightening and cotter pinning of
gas piston nut must be done with parts inside gas barrel. Refer to assembly instructions on assembly
drawing for final details.
5.7.9 Alternately (crosswise) torque tie rods nuts to maximum torque value per assembly drawing notes.
6. Compression Test – Gas Section and Check Valves
6.1 Purpose
Quick evaluation of the integrity of any individual pump section (before or after repair).
6.2 Theory - Drive Section
Each gas booster pump end consists of a sealed piston reciprocating in a smooth bore gas barrel;
inhaling gas on the backstroke through the inlet check; expelling most of this gas on the forward stroke
through the outlet check.
Therefore: THE CONDITION OF ALL THESE PARTS CAN BE MEASURED BY COMPRESSING AIR
DIRECTLY FROM ATMOSPHERE INTO A 1000 PSlG GAUGE ON ANY PUMP SECTION OF ANY
MODEL.
6.3 Schematic
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