MTD 464 Betriebsanleitung PDF herunterladen (Seite 193)

ARMY TM 9-6115-464-34

AIR FORCE TO 35C2-3-445-2

NAVY NAVFAC P-8-624-34

c. Cleaning, Inspection, and Repair.

WARNING

Solvent, Dry Cleaning P-D-680, 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 result in 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 result in

servere personal injury or death.

(1) Clean all metallic, non-electrical parts with dry cleaning solvent (Federal Specification P-D-680)

and dry with filtered compressed air.

(2) Clean electrical components with filtered compressed air and a soft bristle brush. If necessary,

electrical components may be cleaned with a clean, lint–free cloth moistened with an approved

solvent.

(3) Visually inspect housing and cover plates for cracks, corrosion, warping, and other damage.

(4) Inspect panel assembly as follows:

(a) Check panel for cracks, corrosion, warping, illegible markings and other damage.

(b) Inspect indicator lights for cracked, or damaged lens, defective lamp, and corroded or damaged

base.

corroded fuse holder.

(d) Inspect, test, or reset switch for cracks, corrosion, and evidence of shorting.

(e) Check continuity of test or reset switch using figure 3-61 as a guide.

(5) Inspect component board assembly for burned components, damaged wires and cracked or broken

board.

(6) Test individual components of component board using figures 3-61 and 3-62 and table 3-4 as a

guide.

NOTE

Disconnect one lead to component being tested to avoid erroneous test readings.

(7) If any circuit board component must be replaced or encapsulating coating repaired or replaced, refer

to Appendix A references for detailed procedures. Repair/replace encapsulation by applying a 0.007

inch (minimum) coating of polyurethane resin (Scotchcoat 221, Minnesota Mining and Mfg. Co., or

equal).

NOTE

Prior to coating, deaerate resin by evacuating at room temperature to between 5 and

10 Hg absolute to remove air bubbles.

3-139

1 2 ... 188 189 190 191 192 193 194 195 196 197 198 ... 492 493

MTD 464 Betriebsanleitung Seite 193