- 9 -
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, seals, o-rings and gaskets should be
replaced when rebuilding gearbox.
Torque Chart
Service Tools
Gearbox Disassembly
Refer to Gearbox Assembly, page 14.
1.
Remove the handle, belt guard & drive assembly
(page 18), engine & guard ring (page 20).
2.
Loosen the square head set screw (page 16, #20)
until the gearbox housing can be lifted off the spider
assembly.
3.
Flip the gearbox housing (#7) over and set it on the
four guard ring pads.
4.
Remove the yoke arm (#9) by removing one of the
retaining rings (#6), holding the pivot rod (#12) and
sliding the rod out of the holes.
5.
Remove the two flange bolts (#24) and the two flat
head screws (#25) that hold the cover (#8) to the
gearbox housing (#7).
6.
Remove the cover and discard the shims (#11) and
the o-ring (#5).
7.
Pull out the shaft (#14) with the bearings (#3) and the
worm gear (#13) and drain oil out of gearbox.
8.
Press bearing (#3) and worm gear (#13) off long side
of shaft (#14).
9.
Remove key (#15) and retaining ring (#2) from shaft.
10. Press remaining bearing (#3) off of shaft.
11. Remove the four flange bolts (#23) and the bearing
cap (#20). Discard the shim gasket (#10) and the
o-ring (#17).
12. Remove the worm shaft (#19) and the bearings (#22).
13. Remove the retaining cap (#21) and discard the shim
gasket (#10) and the o-ring (#17).
Gearbox Assembly
Refer to Gearbox Assembly, page 14.
1.
Lightly oil the shaft (#14). Install the key (#15) and
the retaining ring (#2) onto the shaft.
2.
With the retaining ring end of the shaft down, press
the worm gear (#13) onto the shaft. Make sure the
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
07276
Adjustment Tool, Tilt Arm Parallelism
07277
Adjustment Tool, Tilt Arm Height Gage
07279
Installation Tool, Spider Bushing (#06459)
16421
Bearing Spool Tool (Constant Force)
Summary of Contents for F36/4
Page 17: ...14 Gearbox Assembly...
Page 19: ...16 Spider Assembly...
Page 21: ...18 127 86 21 21 25 52 1 Drive Assembly...
Page 23: ...20 7 58 7 58 Guard Assembly...
Page 25: ...22 Handle Assembly...
