WHEEL PINION CLUTCH
Spring Ratchet Style
WHEEL PINION SERVICE
The Spring Ratchet type wheel clutch system has been
used on a wide variety of models. It consists of a spring
supporting a drive key which engages the pinion. When
the mower drive is engaged the axle turns the key which
is engaged with an internal tooth on the pinion. The
pinion turns the wheel gear. When the mower is pushed
or turned, the pinion must rotate faster than the axle.
As the pinion rotates it depresses the key, allowing the
differential action.
The steps to service the wheel pinions are the same for
both front and rear wheel drive models.
1. Raise the mower until the wheel is off the ground.
Support with a block.
2. Remove the wheel bolt, wheel and wheel cover (Fig.
175).
The axle drives both keys and pinions equally but they
will ratchet individually. When the mower is pulled
backwards, this type of clutch does not disengage. It will
require the axle and transmission to turn backwards. It is
critical to easy backing to make sure the self-propel belt
properly disengages.
Servicing the System
The things that can impede the function are dirt, rust or
wear. The owner’s manual requires that ordinary engine
oil be added to each side of the pinion periodically.
This is to keep the anti seize from drying up. If that is
not done, it will be necessary to remove the pinion,
key and spring to clean and re-lubricate with anti-seize
compound.
Fig 175
MVC-739
On the left side there will be two keyed thrust washers
and one regular thrust washer. Clean the end of the axle,
keyway, and the parts removed. Inspect the key; if worn,
replace. Make sure the thrust washers have the key tab
on them. If the tab is broken, the pinion will tend to push
the retaining rings out of their grooves.
3. Remove the retaining ring and thrust washer (Fig.
176).
Lubricate the key, spring, and axle with anti-seize
compound and reassemble. Note the pinion has the
letter “R” stamped on one side and “L” on the other. If
you are on the right side of the mower, the letter “R”
should face you when you install the pinion. The letter
“L” should be visible on the left side of the mower.
Fig 176
MVC-746
WPM Drive Systems Manual
7-9
| Categories | Lawn Mower Manual, Parts and Accessories Manuals, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro 16400, Toro 16401, Toro 16575, Toro 16576, Toro 16585, Toro 16775, Toro 16776, Toro 16785, Toro 20003, Toro 20005, Toro 20007, Toro 20008, Toro 20009, Toro 20013, Toro 20014, Toro 20019, Toro 20022, Toro 20023, Toro 20025, Toro 20027, Toro 20029, Toro 20030, Toro 20033, Toro 20038, Toro 20041, Toro 20042, Toro 20044, Toro 20045, Toro 20046, Toro 20048, Toro 20049, Toro 20051, Toro 20061, Toro SR 21OS |
| Model Number | 16576 |
| Model Year | 1990, 1996, 1999, 2001, 2003, 2004, 2005, 2006, 2007 |
| Download File |
|
| Document Type | Operator's Manual |
| Language | English |
| Serial Number | 0000001 - 0999999 |
| Product Name | Toro Lawnmower |
| Product Brand | Toro. 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 Type | Walk Behind Mower |
| Swath | 21 inch |
| Discharge | Side |
| Engine Manufacturer | Tecumseh |
| Engine Oil Type | 21 oz. (.62l) 30w or 10w-30 / API SH or higher |
| Engine Motor Model # | TVS100-44021B |
| Engine Motor Type | 4 Cycle |
| Transmission Type | Hand Push |
| Spark Plug | Champion RJ17LM |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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