11
www.vintageair.com
905701 REV B 09/18/18, PG 11 OF 34
Evaporator Pre-Installation
1.
2.
3.
On a workbench, remove the center louver plenum assembly from the evaporator unit by removing (2) 10-32
x 1/2” screws (See Photos 1 & 2, below).
Remove the defrost plenum by removing (2) 10-32 x 1/2” screws (See Photo 3, below).
On the slotted top opening of the evaporator firewall bracket, install a 1/4-20 x 27/32” U-nut (See Photo 4,
below).
Evaporator Firewall Bracket Installation
1.
2.
Install the evaporator firewall bracket onto the evaporator unit using the (4) 1/4-20 x 1/2” bolts supplied on
the evaporator unit as shown in Photo 1, below.
Install a 1/4-20 x 1 ½” stud into the previously installed U-nut on the evaporator firewall bracket, and thread
it until approximately 1/4” of the stud is showing (See Photo 2, below). NOTE: The 1/4-20 x 1 ½” studs
are provided for easier installation of the evaporator unit. All studs will be replaced with bolts at
the end of the installation.
Photo 1
Photo 1
Photo 2
Photo 2
Photo 4
Photo 3
Remove
10-32 x 1/2” Screw
Center Louver
Plenum Assembly
Remove
10-32 x 1/2” Screw
1/4-20 x 27/32”
U-Nut
Install a 1/4-20 x
1 ½” Stud into the
U-nut
Remove (2)
10-32 x 1/2”
Screws
Evaporator
Firewall Bracket
646915
Center Louver
Plenum Assembly
1/4” of
Stud Showing
Defrost
Plenum
Install the Evaporator
Firewall Bracket onto
Evaporator using (4)
1/4-20 x 1/2” Bolts
