The parts listed in the following table are identified as one of the following: 
•  Tier 1 customer replaceable unit (CRU): Replacement of Tier 1 CRUs is your responsibility. If Lenovo 
installs a Tier 1 CRU at your request with no service agreement, you will be charged for the installation. 
•  Tier 2 customer replaceable unit: You may install a Tier 2 CRU yourself or request Lenovo to install it, at 
no additional charge, under the type of warranty service that is designated for your server.
•  Field replaceable unit (FRU): FRUs must be installed only by trained service technicians.
•  Consumable and Structural parts: Purchase and replacement of consumable and structural parts is 
your responsibility. If Lenovo acquires or installs a structural component at your request, you will be 
charged for the service.
Table 17.  Parts listing
Index
Description
Tier 1 CRU Tier 2 CRU FRU
Consumable 
and 
Structural 
parts
For more information about ordering the parts shown in Figure 9 “Server components” on page 47:
https://datacentersupport.lenovo.com/products/servers/thinksystem/sr645/7d2x/parts
1
Top cover
√
2
Standard air baffle 
√
3
Riser assembly (LP)
√
4
Riser assembly (LP+LP)
√
5
Riser assembly (LP+FH)
√
6
Rearwall bracket
√
7
PCIe adapter
√
8 
System board
√
9
RAID super capacitor holder (on 
chassis)
√
10
RAID super capacitor holder (in riser 
cage)
√
11
RAID super capacitor
√
12
OCP 3.0 Ethernet adapter
√
13
Power supply unit
√
14
Power supply unit filler
√
15
Front I/O assembly with diagnostics 
panel (right)
√
16
Front I/O assembly
√
17
LCD diagnostics panel assembly
√
18
Front I/O assembly with diagnostics 
panel (top)
√
19
1 x 2.5-inch drive bay filler
√
20
2 x 1 2.5-inch drive bay filler
√
48 ThinkSystem SR645 Setup Guide