4
Disc Valve Hydraulic Motor
10 000 Series
Geroler Motors—Two Speed
Valve
Housing
Valve
Valve
Plate
Figure 2
Spring (4)
Balance Ring/Pins (2)
A, C, E, Back-up Ring
B, C, F, O-ring
Figure 4
A
B
A
D
C
E
F
3 Carefully lift the valve housing straight up. The balance ring should
lift away with the valve housing. The valve will remain on the valve
plate.
4 Set the valve housing on a clean work bench. Be sure to protect its
machined surfaces. Remove the 108 mm [4.25 in.] seal and 9,5 mm
[.375 in.] o-ring.
5 Remove the plug and o-ring from the port face. Remove the case
drain plug and o-ring from the bottom of the valve housing (see Figure 3).
6 Remove the balance ring and four balance ring springs. The
balance ring fits into the valve housing tightly. A sliding hammer
bearing puller may be needed to loosen it.
7 Remove the o-rings and back-up rings from the balance ring.
Note: Compressed springs under plugs, see step 8.
8 Carefully remove the two control spool plugs and o-rings.
9 Remove the control spool and springs.
10 Remove the two check ball plugs and o-rings. Remove the two
check balls and springs.
Disassembly
Valve
Housing
Plug/O-ring
Plug/O-ring
O-ring
Seal
Figure 3
Plug
Assembly
Plug with
Recess/
O-ring
Spring
Spool, Control
Plug/O-ring
Spring
Spring
Ball, Check
Figure 5
