HP HPE Alletra 2140 Hardware Manual page 56

OCP cards, if ordered, are shipped separately. Save all original packaging.
2. Install the outer rail assemblies onto the rack.
Note: To ensure that the array thumbscrews align correctly, align the rail assembly in exactly 4U of rack space.
The bottom stud on the rail assembly inserts into the bottom hole of the bottom unit of the 4U rack space allotted
for the array.
a) Align the bottom stud of the rail at the position you want.
Note the orientations embossed on the outer rail.
b) Press the keeper latch and position the front studs in the rack. When the studs are engaged, release the keeper latch
to secure the front of the rail in the rack.
c) Align the back of the rail at the same rack position as the front.
d) Position the back studs in the rack and press the keeper latch. When the studs are engaged, release the keeper latch
to secure the back of the rail in the rack.
e) Repeat steps a through d on the other side.
The following diagram shows where the rail assemblies should be correctly installed in a rack.
1 Left front rack post
2 Left rail assembly
3 Right front rack post
3. Slide the chassis into the rack.
CAUTION:
The chassis weighs over 38 kg (84 lb). Always use at least two people or a server lift when lifting the chassis.
a) Insert the chassis into the rack, back side first. Be sure the inner rails insert into the outer rails.
b) Gently slide the chassis into position.
When you hear a click, the inner rails have locked into the rail assembly.
4 Right rail assembly
5 Keeper latch
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Install the Expansion Shelf 56