MBW 5800 Series - Manual (Page 12)

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Exciter Disassembly
Refer to Exciter Assembly, page 12.
1. Remove flat head screw (#23) and countersunk
washer (#11) securing the pulley (#15) to the exciter
shaft (#17).
2. Slide pulley off of exciter shaft. be sure not to lose
shaft key (#14).
Note: To aid in removal of rear cover you will need two 5/16-
18 bolts, minimum grade 5.
3. Remove 6 flange screws (#24) from rear cover (#18).
To press rear cover (#18) off of housing, thread two 5/
16-18 grade 5 bolts into thread holes on cover. Turn
bolts in with wrench or ratchet to press cover out.
When pressing cover off try to keep even pressure on
both side to ensure cover comes out straight.
4. Remove 6 flange screws (#22) from front cover (#16)
and remove front cover.
5. Remove snap ring (#10 ) from exciter shaft (#17).
6. Support exciter assembly on outside diameter of
exciter housing (#1) and press exciter shaft out of
housing.
Note: If bearings have failed and need to be replace
then proceed with bearing removal step 6. If bearings
do not need replacing skip to step #11.
7. Support exciter housing (#1) and press out front
bearing (#9) from inside out.
8. Remove snap ring (#4).
9. Remove bearing (#8) from rear cover (#18) with 1/4”
punch.Tap the bearing out thru the holes for caps
screws (#21). Be sure to alternate between holes to
avoid cocking the bearing.
10. Remove bearing (#8) inner race from exciter shaft by
supporting O.D. of race and pressing exciter shaft
thru.
11. Remove filter retainer plate (#2) and filter (#5) by
removing 2 cap screws (#21).
12. Remove pipe plug (#26).
Exciter Assembly
Refer to Exciter Assembly, page 12.
1. Prior to assembly, clean all parts in a suitable solvent
or cleaning solution. When a complete disassembly
is done it is recommended that all seals, gaskets and
bearings are replaced.
Note: If replacing bearings proceed to step #2, if not
replacing bearings skip to step #6.
2. Press front bearing (#9) into exciter housing (#1).
3. Press bearing (#8) inner race onto exciter shaft
(#17).
4. Install snap ring (#10) onto exciter shaft, opposite end
as pulley.
5. Support I.D. and O.D. of bearing (#9) and press
exciter shaft into bearing.
6. Install snap ring (#10) onto exciter shaft on pulley
end.
7. Check felt filter (#5) to be sure it is not blocked or
deteriorating, Replace if damaged.
8. Check and set end of spirol pin (#20) to be 3/16” from
inside of rear cover (#4). See Figure 5.
9. Press bearing (#8) into rear cover (#18) and install
snap ring (#4).
Note: To aid in assembly of rear cover you will need
three, 5/16-18 x 2-1/2 minimum length bolts, to aid in
alignment of rear cover.
10. Apply a light coating oil to I.D. of exciter housing.
11. Apply gasket maker around holes and to flange face
of rear cover. (See figure 5)
12. Set rear cover (#18) on exciter housing and install
three alignment bolts into exciter housing.
CAUTION
Be sure that the inner bearing race is properly aligned
to slide into the bearing. If proper alignment is not
maintained the shaft may push the front bearing out of
the housing.
13. Carefully press or tap the rear cover (#18) down to
seat on the exciter housing. Use care to keep cover
straight when installing to prevent damaging housing
or cover.
14. Remove the three alignment bolts and install six
flange screws (#24) securing the rear cover. Torque
flange screws to 13 ft.-lbs.
15. Use medium strength thread lock when installing
retainer plate (#2) with 2 cap screws (#21).
16. Install oil drain cap screw (#21) and brass washer
(#25).
.188
SPIROL PIN
REAR COVER
APPLY GASKER MAKER
FIGURE 5