MBW GP3000-15 - Manual (Page 11)

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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
Exciter Disassembly
Steps 1 thru 6 reference the figure on page 12.
1. Remove the belt guard (#5) and v-belt (page 18, #3).
2. Remove the bolts (#29) that hold the deck (#2) to the
housing (#1).
3. Lift entire deck with engine from housing.
4. Remove the four exciter hold down bolts (#18).
5. Lift the exciter (#3) from the housing (#1).
6. Clean the exciter before proceeding with the
disassembly.
Steps 7 thru 17 reference the figure on page 16.
7. Remove the flange screw (#21) and washer (#14)
securing the pulley (#3) to the exciter shaft (#2).
8. Slide the pulley off the exciter shaft. Be careful not to
lose the key (#15).
9. Remove rear cover (#5) by unscrewing the six flange
screws (#21).
10. Block exciter housing (#1) on large O.D. side (rear
cover side), then press exciter shaft through exciter
housing.
11. Remove front cover (#4) by unscrewing the six flange
screws (#20).
12. Remove bearing (#12) from exciter housing by
pressing it out from the inside.
13. Remove retainer (#7) by unscrewing the two cap
screws (#19).
14. Remove snap ring (#8).
15. Remove bearing (#11) from rear cover (#5) by using
a 1/4” punch. Tap the bearing out thru the holes from
the cap srews in step 13. Be sure to alternate
between holes to avoid cocking the bearing.
16. Remove snap ring (#9).
17. Remove inner race of bearing (#11) from the exciter
shaft by supporting the O.D. of the race and pressing
the exciter shaft thru.
Exciter Assembly
Steps 1 thru 19 reference the figure on page 16.
1. Press bearing (#12) into exciter housing (#1). Use
care to press on the O.D. of the bearing only.
2. Press the inner race of bearing (#11) onto exciter
shaft (#2).
3. Install snap ring (#9) onto exciter shaft.
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