TM-9-2350-238-20-2

CRANE (CAB) COMPONENTS RECOVERY VEHICLE, FULL TRACKED: LIGHT,ARMORED, M578

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL

MAY 1993

CHANGE 1

TM-9-2350-238-20-2 - Page 115 of 495

WARNING

Section VII .

UNIT MAINTENANC E

TM 9-2350-238-20- 2

INSTRUCTION S

2-25. GENERAL.

This section provides

general repair methods and cleaning pro-

cedures. Special repair and cleaning pro-

cedures are provided, as required, in the in-

dividual maintenance instructions .

2-26. REPAIR METHODS .

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Complete disassembly is not alway s

necessary to make a repair. Exercis e

good judgement to keep disassembly an d

reassembly to a minimum .

Repair or replace unserviceable parts an d

hardware. Always replace packings ,

gaskets, and seals with new parts .

Remove burrs with a stone or file. Re-

move burrs on closely fitted mating sur-

faces by lapping the surfaces with lap-

ping grinding compound (item 13, app x

C) .

Remove corrosion or rust with crocus

cloth (item 6, appx C) or emery clot h

(item 7, appx C). Use the method tha t

will not damage the surface bein g

cleaned. Crocus cloth (item 6, appx C)

should be used to remove corrosion an d

rust from polished surfaces. Make sur e

that critical dimensions are not altere d

when using crocus cloth .

Repair damaged threads with a threa d

chaser or die .

When welding is authorized, procedure s

in TM 9-237 must be followed. Weld s

must be inspected for cracks .

Bearings should be inspected and main-

tained following procedures in TM 9-214 .

Clean electrical ground contacts wit h

crocus cloth (item 6, appx C) or emery

cloth (item 7, appx C). Make sure groun d

connections are tight .

Repair chafed, broken, or damaged elec-

trical wiring with insulation tape (ite m

20, appx C). When soldering is required ,

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procedures in TB SIG 222 must b e

followed .

After locating the malfunction and repair-

ing the component, test it for proper

function .

Follow torque values given throughou t

this manual. When no torque value is

given, follow the torque limits guide, pro-

vided in appendix E of this manual, t o

prevent damaging parts .

2-27. CLEANING .

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Wire brush metal parts to remove rus t

and corrosion .

Dry cleaning solvent (SD2) is toxic

and flammable. Wear protectiv e

goggles and gloves and use only

in well-ventilated area .

Clean metal parts with dry cleaning sol-

vent (SD2) (item 10, appx C). Metal or

fiber brushes may be used to apply

cleaning solvent and to remove softene d

or dissolved material. Hand scraping wit h

metal scrapers may be used to remov e

soft coatings or deposits .

Soak oily or greasy metal parts in a tank

containing dry cleaning solvent (SD2)

(item 10, appx C). The time parts mus t

be in solvent varies with the type an d

amount of material to be removed .

Do not use solvent to clean electrical in-

sulation, wires, cables, or wirin g

harnesses. Clean these parts by wipin g

with a damp cloth. Use a mild soap solu-

tion if necessary. Dry immediately wit h

clean dry cloths. Clean contact points

with flint abrasive paper (item 1, appx

and dust thoroughly after cleaning .

C )

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