Toro Walk Behind Mowers 21199Hd 2018 Rear Axle Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          1 - 2 hours

Sections

Safety Precautions
2 steps
Grass Bag
2 steps
Rear Axle Removal
18 steps
Rear Axle
12 steps

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BackToro Walk Behind Mowers 21199HD (2018)
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Introduction

Note: This procedure requires two people.

What you need

Step 1

              Disconnect the spark plug wire

Before you begin, ensure that the mower is powered down and cool to the touch.
Grab the plastic housing at the end of the spark plug wire and pull firmly to disconnect it.

Before you begin, ensure that the mower is powered down and cool to the touch.

Grab the plastic housing at the end of the spark plug wire and pull firmly to disconnect it.

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Step 2

              Chock the rear wheels

Chock the rear wheels to prevent the mower from rolling during service.
If the blades are extremely dirty, you can clean them using the washout fitting so the bolts on the underside of the blade guard are accessible.

Chock the rear wheels to prevent the mower from rolling during service.

If the blades are extremely dirty, you can clean them using the washout fitting so the bolts on the underside of the blade guard are accessible.

Step 3

              Lift up the deflector

Lift up the plastic deflector.

Lift up the plastic deflector.

Step 4

              Remove the grass bag

While holding the deflector up and out of the way, lift the grass bag handle away from the mower to detach it.
Remove the grass bag.

While holding the deflector up and out of the way, lift the grass bag handle away from the mower to detach it.

Remove the grass bag.

Step 5

              Set the height adjustment lever

Set the height adjustment lever all the way forward, past the “A” setting, to loosen the axle spring underneath the mower.

Set the height adjustment lever all the way forward, past the “A” setting, to loosen the axle spring underneath the mower.

Step 6

              Tilt the mower on its side

Tilt the mower onto its side so the blades are facing out.
This may require two people.

Tilt the mower onto its side so the blades are facing out.

This may require two people.

Step 7

              Unhook the axle spring

Reach underneath the axle, near the transmission, and pull the axle spring out towards the axle and down to unhook it.
Return the mower back to an upright position.

Reach underneath the axle, near the transmission, and pull the axle spring out towards the axle and down to unhook it.

Return the mower back to an upright position.

Step 8

              Block up the mower

Place the mower on blocks so each wheel is above the work surface and can rotate freely.

Place the mower on blocks so each wheel is above the work surface and can rotate freely.

Step 9

              Remove the wheel

Use a 9/16 inch socket to remove the wheel nut.

Use a 9/16 inch socket to remove the wheel nut.

Step 10

Remove the wheel.

Remove the wheel.

Step 11

              Remove the axle components

Remove the wheel washer.

Remove the wheel washer.

Step 12

Remove the dust cover.

Remove the dust cover.

Step 13

Use a pair of needle nose pliers to remove the gear retaining pin.

Use a pair of needle nose pliers to remove the gear retaining pin.

Step 14

Remove the drive gear.

Remove the drive gear.

Step 15

Use a pair of snap ring pliers to remove the snap ring from the driveline.

Use a pair of snap ring pliers to remove the snap ring from the driveline.

Step 16

Remove the snap ring washer.

Remove the snap ring washer.

Step 17

Use a 1/2 inch socket to remove the driveline bearing retaining bolt.

Use a 1/2 inch socket to remove the driveline bearing retaining bolt.

Step 18

Firmly pull the driveline bearing away from the mower.
This bearing is holding the driveline in place, so some components may shift around during removal.
This may require some force.
Repeat the last nine steps for the right side of the mower, starting with removing the right wheel. Once complete, continue to the next step.

Firmly pull the driveline bearing away from the mower.

This bearing is holding the driveline in place, so some components may shift around during removal.

This may require some force.

Repeat the last nine steps for the right side of the mower, starting with removing the right wheel. Once complete, continue to the next step.

Step 19

              Remove the height adjustment lever

Remove the height adjustment lever from the left side of the mower.

Remove the height adjustment lever from the left side of the mower.

Step 20

              Remove the axle

Holding the left end of the axle with your left hand and the right end of the driveline with your right hand, firmly pull them in opposite directions—the axle to the left, and the driveline to the right.
While maintaining these opposing forces, squeeze both axles together.

Holding the left end of the axle with your left hand and the right end of the driveline with your right hand, firmly pull them in opposite directions—the axle to the left, and the driveline to the right.

While maintaining these opposing forces, squeeze both axles together.

Step 21

With the axle being pulled left and driveline being pulled right, force the left end of the axle out and down, around the end of the driveline.
If done correctly, there will be enough of a gap for the axle to clear the end of the driveline and drop down towards the work surface.

With the axle being pulled left and driveline being pulled right, force the left end of the axle out and down, around the end of the driveline.

If done correctly, there will be enough of a gap for the axle to clear the end of the driveline and drop down towards the work surface.

Step 22

Remove the axle.

Remove the axle.

Step 23

              Install the new axle over the driveline

With the new axle hooked over the protruding end of the driveline on the right side of the device, pull the axle left, up, and over the driveline on the left side.
You may need to grip both rods together in order to pull the axle into position.

With the new axle hooked over the protruding end of the driveline on the right side of the device, pull the axle left, up, and over the driveline on the left side.

You may need to grip both rods together in order to pull the axle into position.

Step 24

              Install the height adjustment lever

Place the height adjustment lever into position.

Place the height adjustment lever into position.

Step 25

              Reinstall left and right side axle components

Push the driveline bearing onto the protruding end of the driveline.
Align the height adjustment lever and driveline bearing bolt with the hole on the axle.
Align the components such that the height adjustment lever falls into the “A” position.
Using a 1/2 inch socket, secure both in place with the driveline bearing bolt, but don’t tighten it all the way yet.
Install the right driveline bearing onto the right side of the mower, securing it in place with the 1/2 inch driveline bearing bolt.
Now, securely tighten both left and right side driveline bearing bolts

Push the driveline bearing onto the protruding end of the driveline.

Align the height adjustment lever and driveline bearing bolt with the hole on the axle.

Align the components such that the height adjustment lever falls into the “A” position.

Using a 1/2 inch socket, secure both in place with the driveline bearing bolt, but don’t tighten it all the way yet.

Install the right driveline bearing onto the right side of the mower, securing it in place with the 1/2 inch driveline bearing bolt.

Now, securely tighten both left and right side driveline bearing bolts

Step 26

              Install the left side snap ring washer

Install the snap ring washer on the driveline.

Install the snap ring washer on the driveline.

Step 27

              Install the snap ring

With another person pushing on the driveline from the other side, use snap ring pliers to install the snap ring into the groove on the driveline.
This can be difficult, and can require a fair amount of force.
The snap ring groove on the left side of the driveline will not be visible until the driveline is pushed far enough left.
You may need to push back against the axle during this process so the height adjustment lever and driveline bearing stay against the frame.

With another person pushing on the driveline from the other side, use snap ring pliers to install the snap ring into the groove on the driveline.

This can be difficult, and can require a fair amount of force.

The snap ring groove on the left side of the driveline will not be visible until the driveline is pushed far enough left.

You may need to push back against the axle during this process so the height adjustment lever and driveline bearing stay against the frame.

Step 28

              Install the drive gears

Install the two drive gears, one on each side of the axle.

Install the two drive gears, one on each side of the axle.

Step 29

Secure both gears to the driveline with a retaining pin.
If this pin is worn out or doesn’t lock into place, replace it.

Secure both gears to the driveline with a retaining pin.

If this pin is worn out or doesn’t lock into place, replace it.

Step 30

              Install the dust covers

Install both dust covers, one on either side of the axle.

Install both dust covers, one on either side of the axle.

Step 31

              Install the wheels

Place both wheels back onto the axle, aligning the drive gear teeth with the gears inside the wheels.

Place both wheels back onto the axle, aligning the drive gear teeth with the gears inside the wheels.

Step 32

Use a 9/16 inch socket to reinstall both wheel nuts, securing the wheels to the axle.

Use a 9/16 inch socket to reinstall both wheel nuts, securing the wheels to the axle.

Step 33

              Flip the mower onto its side

Flip the mower on its side, blades facing out.

Flip the mower on its side, blades facing out.

Step 34

              Hook the spring onto the axle

Hook the height adjustment spring back onto the axle.
This will be difficult if the height adjustment lever isn’t in the “A” position.

Hook the height adjustment spring back onto the axle.

This will be difficult if the height adjustment lever isn’t in the “A” position.

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                    Carsten Frauenheim

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