Procedures. (Cont)

TM 38-260

(7) If the coolant system is of such size that it would be uneconomical to flush (over 50 gallons (189

liters)), it may be possible to open the lines and bleed sufficient flushing solution A through the system lines to ensure

freedom from contamination such as sludge and grit. However, if an auxiliary pump is used, the machine pump must be

removed or disconnected during the cycling operation and disassembled to insure complete cleaning and subsequent

preservation. Be sure the coolant and sludge remaining in pockets between the baffles are removed using a suction

pump or a hand method if necessary.

(8) Reinstall covers, inspection plates and guards which were removed to facilitate external cleaning to the

extent necessary to ensure safe machine operation. Check all lube systems, gear boxes, oil cups, and grease fittings to

ensure each is filled to operating levels. Cycle the machine for approximately 15 minutes or as required to bring

operating oils and fluids up to normal operating temperature. During the cycling operation, permit solution A to flow

freely over the machines precision surfaces normally subject to cutting fluid, and back through the reservoir to

accomplish as much washing action as possible. During the cycling operation, assemblies such as carriages, tables, and

slides (power or manual), shall be manipulated to assist in the washing action.

(9) Immediately following cycling, drain solution A from the coolant and/or cutting fluid system(s). It may

be necessary to use a suction pump to ensure complete removal of fluids. Visual inspection of internal and external

surfaces and mechanisms will verify completeness of cleaning and provide a basis for determination if disassembly will

be required for additional cleaning.

(10) All systems drained and/or cleaned above shall be coated with preservative oil P-10, grade 30, of table

2-1. This may be accomplished by flushing the systems with the above preservative oil. External precision and

unpainted surfaces shall be coated with preservative oil, P-10, grade 50 of table 2-1. Precision mating surfaces should

be manipulated manually to ensure coating with preservative. An exception will be systems normally lubricated with high

pressure, light viscosity oil, such as high-speed, close-tolerance spindle assemblies. These assemblies should be

preserved with preservative oil, P-9, of table 2-1.

(11) Pressure-type grease fittings shall be charged with preservative grease, P-11, of table 2-1. Oil cups

shall be filled with the manufacturer's recommended lubricant.

(12) Special tooling, accessories, and attachments previously removed will be cleaned and preserved at the

same time as the parent machine using the same cleaning materials, processes, and preservatives. They will then be

wrapped in barrier material conforming to MIlL-B-121, grade A, type I or II, class 2 or MIL-B-22191 type I or II. They will

then be placed in a container conforming to MIL-STD-2073- 1, table VII and secured with tape conforming to PPP-T-60.

(13) Items of IPE and OPE that have been cleaned and preserved shall be covered with a protective dust

cover to prevent recontamination. Electrical or electronic systems will be vacuum cleaned, bagged desiccant installed

and the cabinet closed.

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