Cooling Fan Removal and Replacement

TM 11-6130-377-14

b. Open front indicator panel to gain access to

(7) Support the replacement fan assembly

and attach the electrical leads to the fan terminals

interlock switch.

making a good mechanical joint then solder the

c. Remove two screws securing the door interlock

electrical leads to terminals.

switch to the right side panel angle.

(8) Position the fan on the mounting brackets

d. Lift and support the door interlock switch and

and align the screw holes.

tag all electrical leads to ensure proper reassembly.

(9) Install the four screws through the

e. Remove the switch terminal screws and remove

mounting bracket and fan housing and install the

the electrical leads.

lockwashers and nuts. Tighten nuts.

f. Install the electrical leads on their proper switch

(10) Install the air filter and filter screen

terminals and secure with screws and washers.

assembly as described in paragraph 4-11.

g. Position door interlock switch on right side panel

(11) Perform equipment starting procedures

and angle and align mounting holes.

(para 3-3) and operation of fans (para 4-8) to check for

h. Install two screws through angle and into switch.

proper performance.

Tighten screws.

b. Right Side Panel Mounted Fans (fig. 2-1 and 6-

i. Close front indicator panel and secure four

1).

captive screws.

(1) Position DC circuit breaker A1CB1 to

I. Perform equipment starting procedure (para 3-

OFF.

3).

(2) Remove the screen assembly and air filter

from the fan to be changed, to gain access to the fan

6-18.

Cooling Fan Removal and Replacement

mounting screws (para 4-11a).

(fig. 2-1, 3-1, and 6-1)

(3) Remove twelve screws and lockwashers

The inverter is equipped with five cooling fans.

securing the top cover of the inverter and remove the

Two cooling fans are located on the front panel

cover.

assembly near the lower edge (fig. 2-1), and two are

(4) Loosen the jam nuts of the lifting eyes on

located on the right hand side panel near the top edge

the right side of the inverter and unscrew the lifting

(fig. 2-1). The fifth cooling fan is located in the heat sink

eyes.

duct assembly (fig. 6-1). Use the appropriate procedure

given in a, b or c below to remove or replace the cooling

(5) Remove the cap screws securing the right

fans.

side panel to the upper front and rear brace angle.

a. Front Panel Mounted Fans (fig. 2-1 and 3-1).

CAUTION

(1) Position DC circuit breaker A1CB1 to

When moving the side panel care

OFF.

should be used to prevent damage to

(2) Remove the screen assembly and air filter

electrical leads still attached to

from the fan to be changed, to gain access to fan

components.

mounting screws (para 4-11a).

(6) Remove the cap screws securing the right

(3) Open front indicator panel to gain access

side panel to the base subassembly and platform. Right

to the cooling fan.

side panel is free to be moved.

(7) Tilt the right side panel outboard from the

NOTE

top to gain access to the fan mounting hardware.

Support the fan assembly to take the

strain from the electrical leads when

NOTE

performing the following substeps

Support the fan assembly to take the

(4), (5), and (6).

strain from the electrical leads when

performing the following substeps

(4) Remove four screws, lockwashers and

(8), (9) and (10).

nuts securing the fan assembly to the fan mounting

brackets.

(8) Remove four screws, lockwashers and

(5) Tag all electrical leads to ensure proper

nuts securing the fan assembly to the fan mounting

reassembly.

brackets.

(6) Using a 25 watt soldering iron, unsolder

the leads from the fan terminals and remove the fan.

Change 1

6-15