Bosch Rexroth SB23 - Flange Surface Sealing Element Repair; Sealing Elements for LS Control Blocks

Assembly description 11/16
RE 66133-10-R/05.2013, SB23, SB33, EHR23, EHR33, Bosch Rexroth AG
5.4 Flange surface sealing element repair
5.4.1 Sealing elements for LS control blocks
Fig. 8: Flange with three tie rods (Standard) Fig. 9: Flange with five tie rods
Table 3: Sealing elements for LS control blocks
Item Quantity Designation Use Dimensions
2 O-ring
P, Y
18 x 2.5
2 Support ring
P, Y
1 O-ring
R
20 x 2.5
3 Spacer
, , , ,
0.04
2 O-ring
Rx, X, (Ø 8.4 mm)
6 x 1.5
2 O-ring
Rx, X, (Ø 11.4 mm)
8 x 2
2 O-ring
Rx, X, (Ø 13.6 mm)
10 x 2
1. Remove adhesive spacers that might be available from the flange surface.
2. Remove the O-rings and support rings from the ports P, Y, R, Rx and X.
3. Insert new O-rings and support rings into the ports P, Y, R, Rx and X in the flange
surface, see Table 4.
Table 4: Sealing element disassembly/assembly for LS control blocks
Port Disassembly Assembly
Pump P
LS Y
Drain oil R
Pilot oil
Feed oil X
Drain oil Rx
Sealing element
disassembly/assembly