Service, Torque chart, Parts replacement cycles and tolerances – MBW MK8 120 User Manual

Page 12: Ervice

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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

Parts Replacement Cycles and Tolerances

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

Bearings

Replace anytime a bearing is rough, binding, discolored or removed from housing or
shaft.

Engine Components

Refer to your engine manufacturer’s Owner’s Manual.

Hardware

Replace any worn or damaged hardware as needed. Replacement hardware should
be grade 5 and zinc plated unless otherwise specified.

Safety Decals

Replace if they become damaged or illegible.

Seals & Gaskets

Replace if a leak is detected and at every overhaul or teardown.

V-Belts

Replace if cracked, torn, or stretched to the point the belt won’t tension properly.

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