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MIL-P-18526A(SH)
31 May 1978
SUPERSEDING
MIL-P-18526(SHIPS)
22 August 1955
(See 6,6)
MILITARY SPECIFICATION
PU<PS, POSITIVE DISPLACEMENT, MAIN/PORT USE,
MAIN BOILER FUEL SERVICE,
NAVAL SHIPBOARD) USE
This specification is approved for use by the Naval Sea Systems
Command and is available for use by all Departments and Agencies
of the Department of Defense.
1.
SCOPE
l.l Scope.  This specification covers rotary positive displacement fuel service pumps,
including prime movers, for main boiler service on Naval ships.
1.2 Classification.
Pumps shall be of the following styles and classes, as specified
(see 6.2.1):
Style I - Horizontal pumps.
Style II - Vertical pumps.
Class R-1 - Pumps for system gage pressures of 1000 pounds per square inch
nominal.
Class R-2 - Pumps for system, gage pressures of 600
nominal.
Class R-3 - Pumps for system gage pressures of 400
norminal.
2.
APPLICABLE DOCUMENTS
2.1 Issues of documents.  The following documents, of the issue in effect on date of
invitation for bids or request for proposal, form a part of this specification to the extent
specified herein.
SPECIFICATIONS
FEDERAL
FF-B-171 - Bearings, Ball, Annular (General Purpose).
FF-B-185 - Bearings, Roller, Cylindrical; and Bearings, Roller, Self-Aligning.
FF-B-187 - Bearings, Roller, Tapered.
FF-S-92 - Screw, Machine:  Slotted, Cross-Recessed or Hexagon Head.
HH-P-96 - Paper, Gasket, Fiber (Animal or Plant) Sheet.
QQ-C-390 - Copper Alloy Casting (Including Cast Bar).
QQ-I-652 - Iron Castings, Gray.
QQ-T-390 - Tin Alloy Ingots and Castings, and Lead Alloy Ingots and Castings
(Antifriction Metal) for Bearing Applications.
QQ-T-570 - Tool Steel, Alloy.
TT-P-645 - Primer, Paint, Zinc-Chromate, Alkyd Type.
GGG-P-701 - Puller, Mechanical Puller Attachment, Mechanical, and Puller Set,
Mechanical.
MILITARY
MIL-S-869 - Steel Bars, Billets and Forgings-Alloy Nitriding Application.
MIL-S-890 - Steel:  Forgings and Bars for Hulls, Engines, and Ordnance (Heat
Treated).
FSC 4320

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