Toro 4200 Lawn Mower User Manual


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Reel Shaft Seal installation for Flex 21 Reels
Service Manual Supplement
(04021/04200 serials 210000101-240000999)
To achieve an acceptable rolling torque at the reel, two of the original style black Seal
(99-3801) are recommended at the inboard locations only. Make every effort to keep
these seals from getting any grease in the inside diameter bore or the shaft may spin
inside the seal, making it ineffective. Two of the tighter fitting blue Seal (105-9945) are
used at the outboard locations and are unaffected by grease at the seal inside diameter.
Special Instructions for assembling (use drawing below as a reference):
1. Place all components inside the bearing housings (grease packed bearings, snap
rings, wave washer, thrust washer and both seals). Push the seals in place by hand.
Do not strike the seals during installation.
2. Slide the housing assembly onto the reel shaft until the bearing inner race contacts the
reel shaft shoulder. Lubricant is recommended for ease of installation of the blue
Seal, but the inside diameter of the black Seal must be completely free of lubricant.
3. Install the plow bolts and draw the tapered nuts against the housing in order to hold
the housing and bearing in position. Do not draw the housing into position with the
tapered nuts or the bearing/seal assembly can become damaged due to pre-loading.
4. Slide the spacer or install the reel nut on the reel shaft until contact with the inner
race of the bearing is obtained. This step assures the inner race is 'square' to the
reel shaft and prevents any possibility of bearing/seal damage due to misalignment.
5. Complete the installation of the housing assembly either by pushing the assembly on
by hand (pressing against the face of both the seal and housing) or using the reel
nut or spacer/pulley/nut to draw the housing assembly onto the shaft. In either case,
use only light steady pressure to complete the installation.
6. Tighten the tapered nuts and turn the reel by hand a couple of revolutions.
7. Verify the reel requires 15 in-lb (1.7 Nm) of force or less to rotate.
Wave Washer
Blue Seal
(105-9945)
Black Seal
(99-3801)
Black Seal
(99-3801)
Bearing
Bearing
Blue Seal
(105-9945)
Machine
Plow Bolts
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