MBW WS500 - 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.
Cleaning unit 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
Engine Mounting Flange Removal
Refer to Engine and Engine Mount, page 16.
1. Disconnect the throttle cable (#18, page 12) from the
engine (#8).
2. Loosen the 6mm socket head cap screw (#2) located
at the base of the engine.
3. Pull the engine off the engine mounting flange (#4).
NOTE: Silicon is used to seal the connection between
the engine and the engine mounting flange.
Rotating the engine will help break this seal.
4. Remove the three hex head cap screws and sealing
washers (#20 & #5, page 12) from the engine
mounting flange.
5. Remove the plug (#1) from the engine mounting
flange.
6. Use an 1/8” allen wrench to loosen the pipe plug
(#12, page 14) inside the exciter housing (#4, page
14) directly below the hole.
7. Stick a rod or screwdriver straight down through both
holes.
8. Rotate the spline shaft (#6) until the exciter hits the
rod and the spline shaft can no longer turn.
9. Use a pliers to grab the spline shaft below the spline.
Rotate the shaft counter-clockwise to remove the
engine mounting flange.
Handle Removal
Refer to Main Assembly, page 12.
1. Disconnect the throttle cable (#18) from the engine.
2. Remove the hex head cap screw (#26) and
lockwasher (#27) securing the rear shockmount (#2)
to the exciter (#15).
3. Remove the two hex head cap screws (#26) and
lockwashers (#27) located at the base of the handle
mount (#9).
4. Remove the handle mount from the exciter.
Exciter Disassembly
Refer to Exciter Assembly, page 14.
The engine mounting flange must be removed before
disassembling the exciter. See Engine Mounting
Flange Removal, page 8.
1. Unthread the three shockmounts (#7) from the exciter
housing (#4). Unthread the shockmount from the
exciter shaft (#6).
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
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