MTD 464 Betriebsanleitung PDF herunterladen (Seite 147)

ARMY TM 9-6115-464-34

AIR FORCE TO 35C2-3-445-2

NAVY NAVFAC P-8-624-34

(18) Remove screws (57), lockwashers (58), and nuts (59) to remove mounting plates (60).

(19) Remove screws (61), Iockwashers (62), and nuts (63) to remove armature (64). Remove locknuts

(65) and setscrews (66) from armature.

(20) Remove screws (67) and Iockwashers (68) to remove coils (69).

c. Cleaning, Inspection, and Repair.

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WARNING

Solvent, Dry Cleaning P–D-880, Type II is flammable and moderately toxic to skin,

eyes and respiratory tract. Eye and skin protection required. Good general ventilation

is normally adequate. Failure to observe this warning could cause servere personal

injury or death.

WARNING

Compressed air used for cleaning and drying purposes can create airborne particles

that may enter the eyes. Pressure shall not exceed 30 psig and use only with adequate

chip guards and chipping goggles. Failure to observe this warning could cause

servere personal injury or death.

Clean all non-electrical parts in dry cleaning solvent (Federal Specification P-D-880) and dry

thoroughly with filtered compressed air.

Clean all electrical parts with a clean, lint-free cloth lightly moistened with an approved solvent.

Visually inspect collars, piston, and bore in valve block for nicks, burrs, scores, and other damage.

Insert piston into valve block bore to ascertain that it moves freely.

Inspect transducer slug and bore of transducer for nicks, burrs, scratches, and other damage.

Remove minor nicks and burrs from transducer slug with crocus cloth.

Inspect transducer for burns, discoloration, and other indications of electrical malfunction. Check

continuity of transducer using figure 3-38 as a guide.

Inspect electrical connectors for cracks, bent or broken pins, and other damage.

Inspect armature cores for cracks, corrosion, and burns or other indications of electrical malfunction.

Check continuity of cores using figure 3-38 as a guide.

Inspect cover and valve block for cracks, corrosion, and other damage.

Check all threads for crossing, stripping, and peening. Repair minor thread damage with a thread

chaser.

Inspect top and bottom orifices, spacer for nicks and burrs. Inspect three cornered valve for nicks

and burrs on vertical edges that could cause binding; depth of needle hole should be at least 0.125

inch. Inspect bottom face of valve (opposite needle hole) for grooving. The valve may be polished to

remove grooves. After polishing the bottom face, the overall length of the valve must be at least

0.240 inch, if not, replace the valve.

Inspect needles for burrs and any wear indications. Check for straightness by rolling large diameter

end with finger slowly on a known flat surface; observe small diameter end while rolling, it must not

move up and down which indicates a bent needle. A bent needle, new or used, must be replaced as

the pressures at Al and A2 ports will vary and be difficult to adjust for correct values.

Replace any damaged or defective parts.

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