Mda 14 And Mda 21 - Bosch Rexroth Hagglunds CA Series Installation & Maintenance Manual

52/76 Hägglunds CA Radial piston hydraulic motor | Installation
Bosch Rexroth AB, Version 11.2019, RE 15305-WA
Fig. 47: Port connections at MDA 5, MDA 7 and MDA 10
Table 19: Port connections MDA 5, MDA 7 and MDA10
Connection Description
B1 Brake connection
B2 Alt. brake connection
F3, F4 Flushing connection
(For flushing of motor axial bearing)
7.4.9

MDA 14 and MDA 21

Disassembly
1. Start the disassembly by slightly loosening the screws (40). Not more than
one turn each. Continue with one turn of each screw around the cover until
the preload of the belleville springs (315)(cup springs) is zero. After that the
screws can be removed and the brake cover (314) lifted off.
2. The brake piston (313) can be removed by installing 3 screws (M8) and be
lifted off by using the screws.
3. Inner and outer discs (318, 320) can be removed and the spacer (308) in place
can be removed.
4. Loosen the screws (43), and take off the seal retainer (25).
Assembly
1. Oil the screws (43) and assemble with washers, torque 136 Nm (100 lb·ft).
2. Place the correct spacer (3xx) inside the brake housing (305). See Table 20.
3. Mount the discs, start with an outer steel disc and alternate inner friction discs
with outer steel discs until the correct number of discs are reached for the
brake size. See Table 20. Always end with an outer steel disc.
4. Grease the piston seal and guide strip with multi-purpose grease without solid
additives. Mount the brake piston (313) in the brake housing (305), tap it in
place with a plastic hammer. Remove one of the plugs in B1-B2 connection to
evacuate the air during assembly.
B1
F3
B1
F4
B2
Port connection
G 3/4"
G 3/4"
G1/4"
DD00104877