Toro 16400-16778 20014-20061 21-Inch Lawn Mower Service Manual, 1990-2007

BBC / BOS / BCS
6
.   Install the BBC flywheel onto the crankshaft, making
certain that the slots in the BBC flywheel align with
the bumps on the bottom of the self-propel pulley
7.   Press the bearings into the bearing block, using an
arbor press. Press only on the outer race, otherwise
bearing damage will result (use an appropriately
sized arbor or a 1-1/8” (28mm) socket to press the
bearing into the block).
(Fig. 208).
A
8.
Make sure that the foam rubber anti-vibration pads
are in place on the brake drum and assemble the
brake drum bearing block and BBC screws onto the
crankshaft as shown in Figure 210. Secure with the
crankshaft nut.
Note:  Crankshaft nut torque:  45 - 70 ft-lbs. (61 -
B
95 Nm)
Fig 208
3428-0117
A.   Bumps
B.   Slots
Note:  If the crankshaft nut is tightened with these
bumps misaligned, the boss at the bottom of
the keyway on the self-propel pulley will break
and the self-propel pulley will be free to slide
up and down on the crankshaft (Fig. 209).
This can result in noisy operation, premature
belt wear, and belt jumping.
Fig 210
MVC-726
CAUTION!  As with disassembly, the flywheel
can be wedged to tighten the nut. Make sure the
bumps in the self-propel pulley stay engaged
with the flywheel or the pulley will be damaged.
Note:  Make sure that the blade bolts are properly
aligned before tightening the crankshaft nut.
9.
Install the BBC cover with the four flanged head self-
tapping screws.
10.
Install the BBC screen, the blade spacer, the blade,
and the anti-scalp cup onto the BBC screw and
secure with the two flanged nylon locknuts. Torque
to 300 in-lbs. (37 Nm).
A
Fig 209
3428-0116
Note:  Blade locknut torque:  300 in-lbs. (37 Nm)
A.   Boss
11.
Complete BBC service by checking BBC and self-
propel controls, making sure that all are functioning
normally. Adjust as necessary.
8-18
WPM Drive Systems Manual
Product Specification
CategoriesLawn Mower Manual, Parts and Accessories Manuals, Toro Lawn Mower Manual
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Model Number16576
Model Year1990, 1996, 1999, 2001, 2003, 2004, 2005, 2006, 2007
Download File
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- 168 pages
Document TypeOperator's Manual
LanguageEnglish
Serial Number0000001 - 0999999
Product NameToro Lawnmower
Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower
Product TypeWalk Behind Mower
Swath21 inch
DischargeSide
Engine ManufacturerTecumseh
Engine Oil Type 21 oz. (.62l) 30w or 10w-30 / API SH or higher
Engine Motor Model #TVS100-44021B
Engine Motor Type4 Cycle
Transmission TypeHand Push
Spark PlugChampion RJ17LM
Document File TypePDF
Publishertoro.com
Wikipedia's PageToro Company
CopyrightAttribution Non-commercial
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