38 OIO 14en Edition 07/2017 Operating Instructions
Mounting instructions OMG 20/32
Maintenance
1. Remove the socket screws 915.1 and 915.2, take off the end covers 070.1 and 070.2, see Fig. 5,
page 37.
2. Remove the O-rings 739.1, 739.2 and 739.5**, see Fig. 6, page 37.
3. Pull the distance sleeve 039 together with the set of screws out of the measuring housing, see
Fig. 7, page 37.
4. Remove the circlips 869.2 and 869.4 from the measuring screws. Overview see Fig. 9, page 37.
5. Screw out the socket screws 915.6 and 915.7 and remove the lock washers 904.1, 904.2 and
support rings 064.1***, 064.2.
6. Turn in the socket screw 915.6 back completely in order to pull the pole wheel 259 and spacer 056
from the measuring screw large 672.1 using an extractor. Remove the socket screw 915.6 again.
7. Pull the ball bearings from the screws using the extractor.
Installing seals and bearings
1. Insert the O-rings 739.1 and 739.2 into the end covers 070.1 and 070.2, insert the O-ring 739.5**
into the pick up hole.
2. Press the ball bearings 817.1, 817.2, 817.3 and 817.4 onto the measuring screw large 672.1 and
measuring screw small 672.2.
Notice: Press the ball bearings on only over the inner ring.
3. Slide the spacer 056 onto the measuring screw large 672.1, press the pole wheel 259 on.
4. Pull the wedge lock washers 904.1 and 904.2
and support rings 064.1*** and 064.2 onto the sockets
screws 915.6 and 915.7. Overview see Fig. 9, page 37.
Notice: Ensure that the wedge lock washers are positioned correctly (wedge surface to wedge
surface), see Fig. 8, page 37.
5. Mount the socket screws 915.6 and 915.7, with Loctite 242 applied, with mounted washer and ring
onto the measuring screws and tighten with torque, see Tab. 2, page 53.
6. Mount the circlips 869.2 and 869.4 on the floating bearing end.
7. In case of BSPP connection: Place the end cover 070.2 on the measuring housing, lay out the
socket screws 915.2.
- or -
► In case of flange connection: Place the end cover 070.2 and flange cover 115.2* with O-ring
739.4* on the measuring housing, lay out the socket screws 915.4*. Overview see Fig. 2, page 47.
8. Pretension the oiled screws crosswise and tighten with torque, see Tab. 2, page 53.
9. Slide the set of screws in the measuring housing. Slide the distance sleeve 039 into the hole of the
measuring screw small 672.2, see Fig. 10, page 37.
10. Place the end cover 070.1 onto the measuring housing, ensuring that the grooved insert pins A in
the measuring housing fit into the corresponding holes.
11. In case of BSPP connection: Lay out the socket screws 915.1.
- or -
► In case of flange connection: Place on the flange cover 115.1* with O-ring 739.3* and lay out the
socket screws 915.3*. Overview see Fig. 2, page 47.
12. Pretension the oiled screws crosswise and tighten with torque, see Tab. 2, page 53.
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