Heat Sink Duct Mounted Fan

TM 11-6130-377-14

NOTE

(9) Tag all electrical leads to ensure proper

Turn the mounting screws so that

reassembly.

they clear the captive nuts in the fan

(10) Using a 25 watt soldering iron unsolder

plate. The screws and lockwashers

the leads from the fan terminals and remove the fan.

must remain in the fan housing

(11) Support the replacement fan assembly

during removal.

and attach the electrical leads to the fan terminals

making a good mechanical joint, then solder the

(7) Carefully lift and swing the fan assembly

electrical leads to the terminals.

out of the heat sink duct and support it to relieve the

(12) Position the fan assembly on the

strain on electrical leads.

mounting brackets and align the screw holes.

(8) Remove the four screws and lockwashers

(13) Install the four screws through the

from the fan housing and tag for reuse.

mounting brackets and fan housing, install the

(9) Tag all electrical leads to ensure proper

lockwashers and nuts. Tighten nuts.

reassembly.

(14) Position the right side panel against the

(10) Using a 25 watt soldering iron unsolder

upper brace angles and platform and align the bolt

the electrical leads from the fan terminals and remove

holes.

the fan.

(15) Install the cap screws and tighten to

(11) Support the replacement fan assembly

secure side panel.

and attach the electrical leads to the fan terminals

(16) Install the two lifting eyes and tighten the

making a good mechanical joint, then solder the

jam nuts.

electrical leads to the terminals.

(17) Position the top cover and place and align

(12) Install the four screws and lockwashers in

screw holes. Install twelve screws and lockwashers and

the holes of the fan housing.

tighten screws.

(13) Position the fan assembly in the heat sink

(18) Install the air filter and filter screen

duct and on the fan plate, and align the mounting holes.

assembly as described in paragraph 4-11.

(14) Using an offset crosspoint screwdriver

(19) Perform equipment starting procedure

turn the four screws down until tight.

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

(15) Position the heat sink duct cover on the

proper performance.

heat sink duct and align the mounting holes.

c. Heat Sink Duct Mounted Fan (Fig. 6-1).

(16) Install the ten screws, lockwashers and

(1) Position DC circuit breaker A1CB1 to

three harness clamps in their respective holes and

OFF.

tighten screws.

(2) Open front indicator panel.

(17) Position the inverter drive board A1A2 on

(3) Remove connector A1P1 from its

the standoffs of the heat sink duct cover and align the

receptacle A1A2J1 on the inverter drive board A1A2.

mounting holes.

(4) Remove four screws securing the inverter

(18) Install the four screws and lockwashers

drive board to the heat sink and remove the inverter

and tighten screws.

drive board.

(19) Connect plug A1P1 to its receptacle

A1A2J1 on the inverter drive board A1A2.

NOTE

(20) Close the front indicator panel and secure

Make a note as to where the three

the four captive screws.

harness clamps are positioned so

(21) Perform equipment starting procedures

that they can be installed in same

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

place during installation.

proper performance.

(5) Remove ten screws, lockwashers and flat

6-19.

Capacitors A1C3-A (A1C4-A) Through A1C3-

washers securing the heat sink duct cover to the heat

H (A1C4-H)

sink duct and remove the cover.

(fig. 6-1)

(6) Using an offset crosspoint screwdriver

The eight capacitors are mounted in pairs on the left and

loosen the four screws and lockwashers securing the fan

right side panels. Right side panel holds A through D

assembly to the fan plate.

and left side panel holds E through H. To remove and

replace any pair of the capacitors proceed as follows:

Change 1

6-16