Thomas
®
XTSR52 Installation and Maintenance
(Page 12 of 13)
Sizes 494-5258
CP3-002
September 2017
Supersedes 09-2016
Rexnord
5555 S. Moorland Rd., New Berlin, WI 53151-7953
Phone: 262-796-4060 Fax: 262-796-4064 www.rexnord.com
XTSR52
Coupling
Size
“A”
Dimension
LH Hub
Cap Screw for LH Hub
"A" Dimension
XL Hub
Cap Screw for XL Hub
“A”
Dimension
XXL Hub
Cap Screw for XXL Hub
Size
(mm)
Torque
Wrench
Size
(mm)
Size
(mm)
Torque
Wrench
Size
(mm)
Size
(mm)
Torque
Wrench
Size
(mm)
(in)
(mm)
(lb-ft)
(Nm)
(in)
(mm)
(lb-ft)
(Nm)
(in)
(mm)
(lb-ft)
(Nm)
494
2.77
70
M5x20
6.3
8.5
8
3.36
85
M5x20
6.3
8.5
8
---
---
---
---
---
---
644
3.36
85
M5x20
6.3
9
8
---
---
---
---
---
---
4.25
108
M6x20
12.3
17
10
726
---
---
---
---
---
---
4.25
108
M6x20
12.3
16.7
10
5.08
129
M8x25
27
36
13
826
4.25
108
M6x20
12.3
16.7
10
5.08
129
M8x25
27
36
13
5.51
140
M6x25
12.3
16.7
10
996
5.08
129
M8x25
27
36
13
5.51
140
M6x25
12.3
16.7
10
6.54
166
M8x30
27
36
13
1088
5.51
140
M6x25
12.3
16.7
10
6.54
166
M8x30
27
36
13
7.83
199
M10x35
51
69
15
1298
6.54
166
M8x30
27
36
13
7.83
199
M10x35
51
69
15
8.66
220
M10x40
51
69
15
1548
7.83
199
M10x35
51
69
15
8.66
220
M10x40
51
69
15
9.66
245
M12x40
92
124
16
1698
8.66
220
M10x40
51
69
15
9.66
245
M12x40
92
124
16
10.39
264
M12x40
92
124
16
1928
9.66
245
M12x40
92
124
16
10.39
264
M12x40
92
124
16
11.44
291
M12x50
92
124
16
2068
10.39
264
M12x40
92
124
16
11.44
291
M12x50
92
124
16
12.32
313
M14x50
142
193
18
2278
11.44
291
M12x50
92
124
16
12.32
313
M14x50
142
193
18
13.58
345
M12x60
92
124
16
2468
12.32
313
M14x50
142
193
18
13.58
345
M12x60
92
124
16
15.00
381
M14x70
142
193
18
2698
13.58
345
M12x60
92
124
16
15.00
381
M14x70
142
193
18
15.94
405
M14x70
142
193
18
2888
15.00
381
M14x70
142
193
18
15.94
405
M14x70
142
193
18
17.20
437
M16x70
218
295
21
3058
15.94
405
M14x70
142
193
18
17.20
437
M16x70
218
295
21
18.98
482
M16x80
218
295
21
3358
17.20
437
M16x70
218
295
21
18.98
482
M16x80
218
295
21
19.80
503
M16x80
218
295
21
3668
18.98
482
M16x80
218
295
21
19.80
503
M16x80
218
295
21
20.83
529
M16x80
218
295
21
3908
19.80
503
M16x80
218
295
21
20.83
529
M16x80
218
295
21
23.94
608
M20x90
427
579
27
4178
20.83
529
M16x80
218
295
21
23.94
608
M20x90
427
579
27
25.51
648
M20x100
427
579
27
4588
23.94
608
M20x90
427
579
27
25.51
648
M20x100
427
579
27
26.69
678
M20x110
427
579
27
4918
25.51
648
M20x100
427
579
27
26.69
678
M20x100
427
579
27
---
---
---
---
---
---
5258
26.69
678
M20x110
427
579
27
---
---
---
---
---
---
---
---
---
---
---
---
Table 5 – Flange Hex Head Cap Screw Tightening Torques
Note: These torque values are approximate for Cap screws with lubricated threads.
9. Disc Pack Replacement
If it becomes necessary to replace the disc packs, it can be done as follows:
Note: Center member subassemblies with adapters have their locknuts factory tightened. On center member subassemblies where
the spacer length is short and wrench access is limited, special wrenches are used to tighten the locknuts. Consult Rexnord for
assistance in obtaining special wrenches.
9.1 Remove the center member subassembly by removing all cap screws from hubs to compress the center member assembly by inserting them
through the holes in the flanges of the center spool and threading them into the adapter tapped holes as shown in Figure 11B and dropping the
center member assembly out from between the hubs. There are jacking screw tapped holes in each end hub to disengage the pilots between the
hubs and adapters, using the hub to adapter cap screws as defined in Table 5.
9.2 Remove all locknuts, bolts, bushings, and disc packs. Special wrenches may be required. Clean the two adapters and the center spool, removing any
nicks and burrs.
9.3 Install the disc packs to the adapter first so that the washer heads of the disc pack line up with the bolt holes in the adapter as shown in Figure 11C.
Insert the bolts through the adapter bolt holes and disc pack. Match marks (if applied at assembly balance) must be in-line to maintain balance.
9.4 Proceed to install the center member subassembly as outlined in the Final Assembly section 8.
