RESISTANCE LIMITS

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TESTS (Cont)

TM-55-1905-220-14-10 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

TESTS (Cont)

TM 55-1905-220-14-10

5-32. GENERATOR (40 KW) - MAINTENANCE INSTRUCTIONS (Continued).

LOCATION

ITEM

ACTION

REMARKS

TESTS (Cont)

2. Check insulation

If a ground is

resistance for

indicated and

winding to arma-

not located and

ture sleeve or

repaired. Re-

laminations.

place the arma-

ture.

RESISTANCE LIMITS

(Corrected for 25 .

or 77 .)

* Alternator Armature (Slator)

.200

.220

Ohms

Alternator Field (Rotor)

2.55

2.85

Ohms

Exciter Armature

.27

.30

Ohms

Exciter Field CF

48.5

54.0

Ohms

Exciter Field F

1.08

1.2

Ohms

*High Voltage Connection

4. Rotating

rectifiers

assembly

NOTE

The following tests are made with a VOM. Complete the entire

series of checks before performing any repair. Replace any

components which do not have the resistance readings

indicated.

a. Armature

Disconnect and identify.

Identification

leads,

should insure

and field

that the leads

leads

can be recon-

nected to the

same point from

which they were

removed.

5-492