PROCEDURES FOR CLEANING AND PRESERVATION OF MACHINE TOOLS THAT ARE CONNECTED TO POWER (Cont)

TM 38-260

(1) "The hydraulic system has been tested and functions properly, therefore, disassembly for the purpose

of cleaning is not necessary."

(2) "The hydraulic system has been tested and failed to function properly. Disassembly is required for

repair and adjustment."

Thoroughly clean the hydraulic reservoirs associated with the hydraulic systems that have been drained in

accordance with the above instructions. The hydraulic systems, which have been drained shall be refilled with hydraulic

fluid specified in the operators manual or hydraulic fluid conforming to MIL-H-6083.

Cycle the machine for approximately 5 minutes. The purpose of this cycling period is to cause as much

contamination as possible to be in suspension and, at the same time, cause the preservation oil that has been added to

the hydraulic system to be thoroughly circulated. Immediately following the cycling, drain all cleaning solutions

remaining in the machine.

NOTE

DO NOT DRAIN THE HYDRAULIC FLUID THAT HAS

BEEN ADDED TO THE HYDRAULIC SYSTEMS OR THE

OPERATING FLUID FROM LARGE CLOSED TYPE

HYDRAULIC SYSTEMS.

k. At this time an inspection should be made of all assemblies and areas that have been cleaned with solution

A to determine whether additional cleaning is necessary. Internal assemblies requiring additional cleaning should be

cleaned of all corrosion or other contaminants by using a wire brush or any other method which will not cause damage. If

practical, internal assemblies should be cleaned without disassembly.

(1) General. Metalworking machinery should be disassembled only to the extent that a thorough cleaning

can be accomplished. Some assemblies, such as gear trains and clutches are so complicated that reassembly may be

accomplished only with the aid of special drawings or the services of factory trained personnel.

(2) Mandatory disassembly. It is mandatory that grinders and other metal-working machinery that have

been using soluble type coolant be disassembled to the extent that the)y may be inspected and thoroughly cleaned and

preserved. Performance of shutdown maintenance does not eliminate the necessity for disassembly of this type of

equipment.

(3) Liquid lines. All liquid lines such as hydraulic, lubricating, and coolant ,hall be disconnected at fittings

or connection points. Such lines shall be properly tagged, latch marked, or otherwise identified to facilitate reassembly.

The open ends of piping and fittings shall be properly sealed or plugged to prevent entrance of foreign matter.

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