Lenovo ThinkSystem DM3000 series Hardware Installation And Maintenance Manual page 19

• Round-head M5 screws pre-installed in rails, qty 2
• Alignment screws
Verify that you have the correct rail type by examining the PN label located on the outer box for the following:
• Four-Post: SM17A38396
The kit includes the following types of screws:
Type of hardware
Flat-head M5 screw; 14
mm long
Round-head M5 screw;
12 mm long
Alignment screws for
racks with square holes
9.4 mm (head) X 7.5 mm
(length)
Alignment screws for
racks with round holes
7 mm (head) X 7.5 mm
(length)
About this Procedure
• You can install the enclosure in either a square-hole or round-hole rack.
• You must use only the screws that are provided in the kit.
Step 1. Determine where you want to install the enclosure in the rack.Use the rack alignment guide tool to
ensure that you install the enclosure at the same level on either post of the rack.
Note: When possible, install enclosures starting at the bottom of the rack and working up, so that
you can use the enclosures underneath as a guide for installing the next set of rails.
Step 2. Remove the M5 screws from each of the rail ends and the side brackets and saved. Make sure to
leave the 8 outer alignment screws (9.4mm head for the square-hole rack) in the rail flanges for
proper alignment in the rack.
a. If you have a round-hole rack, remove the eight pre-installed square-hole rack alignment
screws and install the eight round-hole rack alignment screws.
Note: Ensure that you use the screws that are appropriate for your rack.
b. Place the rail inside the rack where you want to install the enclosure, and align the alignment
screws on the rail with the holes on the front post of the rack.
c. Extend the rail to the back post of the rack until the flanges on the rail touch the inside of the
rack.
d. Insert one flat-head M5 screw through the hole in the front of the rack, and two flat-head M5
screws through the holes at the back of the rack.
Description
You use six M5 screws for attaching the rails to
the rack, and two M5 screws for attaching the
brackets at the back of the enclosure to the
brackets at the back of the rails.
You use these screws to attach the enclosure
to the rails.
The 9.4mm head screws align the rails in the
square-hole rack, 2 in each of 4 corners.
Note: Alignment screws for square-hole racks
come pre-installed in the rails.
Quantity
8
2
8
8
.
Chapter 3 Rail kit installation instructions
13