Liquid-level Gage

4-13. Liquid-level Gage

temperature sensitive bulb in a well which extends into

the transformer's top liquid and is secured with a union

nut. The well is liquid-tight thus permitting removal of

a. The liquid level gage consists of a float arm and

the thermometer without lowering the liquid level or

magnet on one side of a liquid-tight partition and a

breaking the transformer seal.

second magnet and indicating pointer on the other side.

The gage can be removed whenever the liquid is at or

b. Loosen union nut directly behind the gage.

below the 250C level.

c. Remove gage.

b. To remove the liquid level gage, remove the

two screws in the round face cover.

d. Replace in reverse order.

c. Remove cover and gage.

4-16. Winding Temperature

d. Replace in reverse order.

a. This gage is mounted in the same manner as

the liquid temperature gage. It is removed and replaced

4-14. Pressure Vacuum Gage

in the same way. Care must be taken when inserting

the bulb into the well to prevent damage to the

insulation on the bulb.

a. The pressure vacuum gage can be removed

when the transformer has been vented and the internal

and external pressures are equal.

NOTE

If a remote alarm has been wired

b. Loosen the nut behind the gage.

to the switch of this device the

c. Remove gage.

wires must be disconnected

before removal and connected to

d. Replace in reverse order.

the

same

terminals

when

replaced.

See wiring diagram

4-15. Liquid Temperature Gage

figure 2-6

a. 'The thermometer is mounted with its

Section VII. MAINTENANCE OF LOW VOLTAGE CABINET

4-17. Enclosure

4-19. Lamp Holder Replacement (60 Watt 115 V)

a. Keep all mechanisms for door and panel

latching

tight, free from

bends

causing

hard

a. De-energize circuit by removing the 20 amp

operation.

fuse in light and heater circuit. Fuse block is on inside

of the right section rear door, fig. 2-16).

b. Door hinges are not of the removable pin type,

the hinge is welded to the door assembly. The door

b. Unscrew 60 watt bulb and remove from sock et.

assembly is bolted to the cabinet by two locknuts for

c. Unscrew and remove the two self-tapping

each hinge. To remove a door the locknuts are

screws, one each side of lamp socket (fig. 4-1 I.

removed and then the door assembly. A new assembly

is put in place and secured by the locknuts. Adjust the

d. Remove the two wires connected to the back of

latching mechanism for good weather seal.

socket by screws.

c. The door handles may be replaced by removing

e. Replace the old socket with a new one and

taper pin on inside pinning handle to keyed latch and

install in reverse order of step b, c, and d.

latch bar actuator. Remove handle by pulling out

towards front of door. Install new handle in reverse

4-20. Heater Replacement (fig. 2-16 and 2-17)

order.

a. Loosen the two bolts on the inner end.

4-18. Fuses

b. Remove the bolts and two wire., c. Loosen and

With an ohmmeter test the fuses by placing a meter tip

remove the bolt on the outer end.

on each end and read meter for continuity. No reading

d. Remove heater strip.

indicates a blown fuse.

e. Install new heater strip in reverse order.

4-5