WHEEL PINION CLUTCH
Wheel Pinion Clutch
11. Clip Ring – fits in a groove on the output shaft to
retain the pivot arm and spring arm. The tab at the
center of the clip is extended and fits in the keyway
of the output shaft to prevent rotation. If an E-clip
is substituted, premature failure of the wheel pinion
clutch system will result.
The wheel pinion clutch has a three-fold purpose. One,
when the transmission is engaged, it causes the pinions
to move with the output shaft and drives the wheels.
Two, it provides differential action to allow easy turning
and excellent maneuverability. Three it disengages the
wheel pinions from the output shaft when the operator
is not squeezing the handle. This allows the wheels
to turn backwards without turning the gears inside the
transmission and provides low pull back forces similar to
those on a hand-push version (Fig. 169).
12. Friction Ring – fits in a circular groove in the pivot
arm and works with the clutch washer to actuate the
key. It does not rotate.
13. Clutch Washer – is affixed to the output shaft by
means of the key so it turns with the output shaft.
It is also allowed to rotate slightly with respect to
the output shaft. This slight back and forth rotation
actuates the wheel pinion key. Friction between the
clutch washer and friction ring causes the clutch
washer to lag the output shaft slightly once it is
engaged. That slight rotation is all that is necessary
to raise the wheel pinion key and engage the pinion.
14.
15.
16.
17.
LH Rocking Key – causes the wheel pinion to turn
with the output shaft when up. Allows the wheel
pinion to “free-wheel” when down. Clutch washer
brings key up. Wheel pinion turning forward “wipes”
key down. There is a left-hand and right-hand key.
RH Rocking Key – causes the wheel pinion to turn
with the output shaft when up. Allows the wheel
pinion to “free-wheel” when down. Clutch washer
brings key up. Wheel pinion turning forward “wipes”
key down. There is a left-hand and right-hand key.
Fig 169
3428-0028
Component Definitions
Pinion Gear – positively engages the wheel gear
at all times. Engagement with the output shaft is
controlled by the wheel pinion key. The wheel pinion
is a powdered metal part and is symmetrical so that
it can be put on either way and still function properly.
27.
Output Shaft – turns when the operator squeezes
the handle to provide power to the wheels.
8.
Pivot Arm Assembly – provides support for the
output shaft with a bushing and a needle bearing. It
can be rotated in the end cap to change height-of-
cut.
Compression Spring – provides the light, constant,
inward force necessary for proper clutch washer and
friction ring engagement.
9.
Washer Pivot Arm – fits in corresponding recesses
on the pivot arm to protect pivot arm from premature
wear.
It is extremely important that the wheel pinion clutch be
maintained according to the instructions in the operator’s
manual, which is greasing every 25 hours with one or
two pumps of grease. Greasing regularly will prevent
contaminants from damaging or wearing the system.
10.
Keyed Thrust Washer – internal tab fits in the
keyway on the output shaft. This washer rotates
with the output shaft and protects outboard clutch
components from wear.
Note: Over-greasing will also cause the system to
malfunction.
WPM Drive Systems Manual
7-3
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| 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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