MBW EXA30 - Manual (Page 10)

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S
ERVICE
Assembly and disassembly should be performed by a
service technician who has been factory trained on MBW
equipment. The unit should be clean and free of debris.
Pressure washing before disassembly is recommended.
• Prior to assembly, wash all parts in a suitable cleaner or
solvent.
• Check moving parts for wear and failure. Refer to the
Replacement section in this manual for tolerance and
replacement cycles.
• All shafts and housings should be oiled prior to pressing
bearings. Also, ensure that the bearings are pressed
square and are seated properly.
• All bearings should be replaced when rebuilding any
exciter or gearbox.
• All gaskets and seals should be replaced after any
disassembly.
Torque Chart
Service Tools
Exciter Disassembly
Refer to Exciter, page 14.
1. Drain exciter oil by removing both plugs (#22) and
slightly tipping exciter assembly towards the plugs.
2. Remove both socket head cap screws (#24) securing
hydraulic motor (#18). Remove motor.
3. Remove 14 bolts (#25) securing cover (#9) to exciter
housing and remove cover.
4. Remove both snap rings (#19) and slide gears (#12
& #10) off.
5. Remove 8 bolts (#25) securing cover (#8) to exciter
housing, Remove cover.
Note: If removing bearings from shaft assemblies or
housing, bearings MUST be replaced.
6. Press both exciter shafts (#20) out of housing (#7),
use care not to damage shaft splines.
7. Remove snap rings (#1) and press both bearings (#6)
from housing (#7).
8. (A puller will be required to do this step) Remove
snap rings (#6) from both exciter shafts (#20) and
remove inner races.
9. Remove both snap ring (#1) securing bearings (#4) in
cover (#8). Remove 4 bolts and washers (#23).
10. Support cover (#8) and use a brass punch to tap out
bearings (#4) alternate from side to side of each
bearing to eliminate binding of the bearing.
Exciter Assembly
Refer to Exciter Assembly, page 12.
1. Press inner race of bearing (#4) onto exciter shaft
(#20) and install snap ring (#6). Repeat procedure on
second exciter shaft.
2. Press remaining portion of bearing (#4) into cover
(#8) and install snap ring (#1). Repeat procedure on
second bearing.
3. Press both bearings (#5) into housing (#7) and install
snap rings (#1).
SIZE GRADE 2 GRADE 5 GRADE 8
1/4-20 49 in • lbs 76 in • lbs 9 ft • lbs
1/4-28 56 in • lbs 87 in • lbs 10 ft • lbs
5/16-18 8 ft • lbs 13 ft • lbs 18 ft • lbs
5/16-24 9 ft • lbs 14 ft • lbs 20 ft • lbs
3/8-16 15 ft • lbs 23 ft • lbs 33 ft • lbs
3/8-24 17 ft • lbs 26 ft • lbs 37 ft • lbs
7/16-14 24 ft • lbs 37 ft • lbs 52 ft • lbs
7/16-20 27 ft • lbs 41 ft • lbs 58 ft • lbs
1/2-13 37 ft • lbs 57 ft • lbs 80 ft • lbs
1/2-20 41 ft • lbs 64 ft • lbs 90 ft • lbs
9/16-12 53 ft • lbs 82 ft • lbs 115 ft • lbs
5/8-11 73 ft • lbs 112 ft • lbs 159 ft • lbs
5/8-18 83 ft • lbs 112 ft • lbs 180 ft • lbs
3/4-16 144 ft • lbs 200 ft • lbs 315 ft • lbs
1-8 188 ft • lbs 483 ft • lbs 682 ft • lbs
1-14 210 ft • lbs 541 ft • lbs 764 ft • lbs
1-1/2-6 652 ft • lbs 1462 ft • lbs 2371 ft • lbs
M 6 3 ft • lbs 4 ft • lbs 7 ft • lbs
M 8 6 ft • lbs 10 ft • lbs 18 ft • lbs
M 10 10 ft • lbs 20 ft • lbs 30 ft • lbs
CONVERSIONS
in • lbs x 0.083 = ft • lbs
ft • lbs x 12 = in • lbs
ft • lbs x 0.1383 = kg • m
ft • lbs x 1.3558 = N • m
Part No. Description
16163 Torsion mount install tool
16184 Rubber lubricant (included with 16163)
00709 Exciter shim, .005”
09379 Drum Puller