Generator - TM-10-3930-242-340057

TM 10-3930-242-34

not fall within this range, inspect the field

(b) Refer to figure 3-13 and reassemble

f r a m e terminals, terminals insulation, internal

the water pump.

connections, or field coils that may be defective.

(5) Installation. Install the water pump (TM

h. Installation. Install the engine generator

10-3930-242-12).

(TM 10-3930-242-12),

3 - 9 . Generator

3-10. Voltage Regulator

a. General. The forklift truck is equipped with

a. General. The regulator consists essentially

a 24V, dc generator. The generator is introduced

of a carbon pile variable resistance element and

into the electrical system to provide a source of

a main relay. It is fitted with an inlet receptacle

e l e c t r i c a l current for maintaining the storage

a n d an outlet receptacle for cable connection to

b a t t e r y in a charged condition and to supply

t h e battery charging circuit.

s u f f i c i e n t current to carry any other electrical

b. Removal. Remove the voltage regulator

l o a d requirements up to the rated capacity of

(TM 10-3930-242-12).

t h e generator.

c. Cleaning and Inspection.

b. Rmnoval. Remove the generator (TM

10-3930-242-12).

(1) Clean all metal parts.

( 2 ) Inspect the cover assembly, regulator

c . Disassembly. Refer to figure 3-14 and dis-

b o x and components. Check for loose connec-

a s s e m b l e the generator in numerical sequence.

tions.

d. Cleaning and Inspection.

(3) Inspect relay contacts for burned or pit-

(1) Clean the generator components prefer-

t e d condition. Dress the contacts if necessary.

a b l y using a solvent that complies with Spec.

d. Off-Equipment Adjustment. Refer to fig-

T T - T - 2 9 1 , Grade T, or with solvent P-D-680, if

ure 3-15 Œ and 3-15 and adjust the regulator.

n e c e s s a r y . Do not soak parts in solvent. Dry

These adjustments are to be performed with

with clean, dry compressed air; take care not to

regulator removed from the equipment.

d a m a g e insulation, cable or windings.

e. Installation. Install the regulator (TM

( 2 ) Clean all bearings.

10-3930-242-12).

(3) Inspect screws, bolts, nuts and plugs for

f . Final adjustment. Refer to figures 3-15 Ž ,

w o r n or damaged threads.

3-15 , and 3-15 and perform adjustment on

( 4 ) Inspect brushes for wear.

t h e equipment.

( 5 ) Inspect commutator bars for roughness

a n d pitting. Replace all defective parts.

3-11. Starter

e. T e s t i n g .

a. General. The 24-V dc starter is mounted to

(1) Test the armature on a growler for

t h e flywheel housing. The starter has a shift

s h o r t s , open circuits, and grounds as instructed

l e v e r and solenoid plunger that are totally in-

i n TM 5-764. Replace a defective armature.

closed to protect them from road dirt, icing con-

(2) Test the field coils with a multimeter for

d i t i o n s , and road splash.

continuity and ground as instructed in TM

b. On-Equipment Testing. Refer to figure 3-16

5-764, Replace a defective field coil.

a n d test the starter on the equipment.

(3) Use a multimeter and test for continuity

c. Removal.

Remove the starter (TM

b e t w e e n the insulated brush holder and com-

10-3930-242-12).

m u t a t o r end frame. If continuity is indicated,

d . Disassembly. Refer to figure 3-17 and dis-

the commutator end frame is defective and

m u s t be replaced.

a s s e m b l e starter in numerical sequence,

e. Cleaning a n d I n s p e c t i o n .

f. Reassemble. Refer to figure 3-14 and reas-

( 1 ) Clean all metal parts with dry cleaning

s e m b l e the generator.

g. Bench Testing, Field Current Draw. Install

s o l v e n t P-D-680, or equal, and dry thoroughly.

( 2 ) Clean field coils, armature, and insulat-

a suitable adapter plug in the connector. Con-

i n g parts with a cloth slightly dampened with

n e c t a voltmeter between the field terminal and

cleaning solvent P-D-680 and dry with low pres-

generator frame. Connect an ammeter, field

s u r e pressed air.

r h e o s t a t , battery switch, and' a fully-charged

(3) Inspect all parts for breaks, damage,

2 4 - v o l t battery in series with each other and

and wear.

c o n n e c t the group, the field terminal, and the

f . Testing.

g e n e r a t o r frame. Close the battery switch and

(1) Test the armature on a growler for

adjust field rheostat for a reading of 24 volts on

s h o r t s , open circuits, and grounds as instructed

t h e voltmeter. The ammeter reading should be

i n TM 5-764. Replace a defective armature.

b e t w e e n 0.9- and 1.07-amperes. If current does

3-17