OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

C)
Chapter XVI
LUBRICATIONINSTRUCTIONS
FOREWORD. - The ordnance assemblies described in the
preceding chapters include virtually every class of
mechanical engineering device. These range from
heavy duty machines to exceptionally light duty instruments;
from slQW to very high speed oscillating
and rotating mechanisms: They include electric,
pneumatic and hydraulic power and service uni ts of
varying size and purpose. It .is obvipus that these
many types of mechanisms require equally varied lubrication
and that regular application of appropriate
lubricants is imperative. Furthermore, although
most uni ts can beoper at ed alone, all uni ts must perform
efficiently if the mount is to perform at its
best. It is therefore important that all parts, no
matter how difficult of access, shall at all times
have adequate lubt~catiori. No points requiring lubrica
tion may be ignored or indifferently serviced
without impairing operation of the mount.
Design Provisions for Lubrication
1. All ordnance mechanisms are designed to give lubricants
access to bearing surfaces and wherever practical the
design includes provision for retaining the lubricant. These
arrangements comprise grease and oilfi ttings, grease cups, oil
leads and grooves, wipers, oil and grease reservoirs and sufficient
clearance in each case to give the desired penetration,
provided the correct lubricant is used. Manypedestal fixtures,
1imit stop mechanisms, oscillating bearings and control screw
devices, such as those included in the sub-ject assemblies, have
self-·contained lubricating systems and all hydraulic transmissions
provide self lubrication by immersion of moving parts in
hydraulic oil. These systems as well as manually lubricated
mechanisms include packing rings, bearing cages, oil bath sumps,
wicks, gear cases, cover plates and other devices, to retain
the lubricant. Position and movementof parts and ambient temperature
also influence design and the effectiveness of design
arrangements.
2. Se lee t i on of Lubr i c an t s . - Theselec tion of lubricant
for each bearing surface has been based on design and on the
service to which the part is subjected; in some instances selection
has only been made after extensive tes ts. It is therefore
important that lubricants specified shall be used consi stently
and that substitution of lubricants having other char-
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