Service Manual
Reassembly
Hydraulic Motor type MM, MLHM
- 6 -
mm ball. Lubricate and install O-ring in the
groove of the plate. Install the plate with O-ring
side to the cover. Align the screw holes in the
plate with the screw holes of the gerotor set.
Place the balls into the plate. (see Fig.2).
Note: For MM8 and MLHM8 version the
plate has two O-ring grooves.
15. Install the end cover (see Fig.1). For end
covers “S”, “PL(R)” and “D” orient the port
face right to the name plate of the housing !
16. Install in the end cover screws with
washers and alternately torque them to 2,5÷3
daNm. Before mounting the screws apply 2 or 3
drops of
LOCTITE 222 or 243 at top of thread.
17.
Install
washer
(O-ring
for
MLHM...4,5,7,8) on drain plug. Tighten plug
with S4 Allen wrench with torque 0,8÷1
daNm.
18. For “F”-flanged motors install in the
flange 3 screws M6x14 torque them to 5÷6 Nm.
19. Install key in shaft key groove.
Disassembly and reassembly of MMP...L(R), MMD, MLHM...PL(R) and MLHM...D (with
integrated Crossover Relief Valve):
These motors are the same as the standard motors except end cover. Follow the same disassembly
and reassemble procedures as for the standard motor.
Disassembly: Unscrew Valve seat and Plug using a S19 wrench. Remove and clean the other parts .
Remove the O-rings from the grooves of the Valve seat and the Plug (see Fig.9A and 9B).
Fig. 9A
Fig. 9B
Reassembly: Install O-rings 11,2x1,8 and 9x1,8 in the relevant grooves of valve seat. Lubricate the
valve and mount it into the valve seat hole, place on it the rest with the slot directed to its conical part.
Screw the valve seat in the housing acc.to the required side for protection (L or R) with 2÷2,3 daNm
torque using a S19 torque wrench.
Install O-ring on the plug. Mount the washer and spring in the inner hole of plug. Tighten plug
with S6 torque wrench with torque 2÷2,3 daNm.
Plug
O-Ring
Washer
Spring
Reset
Valve Seat
O-Ring
O-Ring
Valve
End Cover "D"
Reset
Valve
O-Ring
O-Ring
Valve Seat
Spring
Washer
O-Ring
Plug
Plug
Washer
End Cover "PL"
Spring
Washer
Plug
O-Ring
Valve
Reset
O-Ring
O-Ring
Valve Seat