Difficulty
Moderate
Steps
22
Time Required
30 - 45 minutes
Sections
6
- Safety Precautions
- 2 steps
- Grass Bag
- 2 steps
- Belt Cover
- 2 steps
- Left Belt Pulley
- 7 steps
- Left Sprocket Belt Removal
- 1 step
- Right Belt Pulley
- 8 steps
Flags
0
BackToro Walk Behind Mowers 21199HD (2018)
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Introduction
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
Remove the belt guard bolts
- Use a 3/8-inch socket to remove the four bolts securing the belt guard:
- Three 1 inch-long recessed bolts
- One 1 1/2 inch-long bolt
Use a 3/8-inch socket to remove the four bolts securing the belt guard:
Three 1 inch-long recessed bolts
One 1 1/2 inch-long bolt
Step 6
Remove the belt guard
- Pull the belt guard straight off the front of the mower to remove it.
Pull the belt guard straight off the front of the mower to remove it.
Step 7
Loosen the belt tensioner
- Loosen, but don’t remove, the belt tensioner to give the belt some slack.
- Use a 1/2 inch socket and 1/2 wrench simultaneously to loosen the tensioner.
Loosen, but don’t remove, the belt tensioner to give the belt some slack.
Use a 1/2 inch socket and 1/2 wrench simultaneously to loosen the tensioner.
Step 8
Remove the pulley plug cap
- Use a flathead screwdriver to pry off the plastic plug cap.
- Remove the plug cap.
Use a flathead screwdriver to pry off the plastic plug cap.
Remove the plug cap.
Step 9
Remove the upper belt guide
- Use a 3/8 inch socket to remove the four bolts securing the upper belt guide to the pulley.
Use a 3/8 inch socket to remove the four bolts securing the upper belt guide to the pulley.
Step 10
- Remove the upper belt guide from the pulley.
Remove the upper belt guide from the pulley.
Step 11
Remove the left pulley
- Use a 1/2 inch socket to remove the left pulley bolt
Use a 1/2 inch socket to remove the left pulley bolt
Step 12
- Remove the pulley bolt and washer.
Remove the pulley bolt and washer.
Step 13
- Remove the left pulley.
- Remove the bushing from the pulley.
Remove the left pulley.
Remove the bushing from the pulley.
Step 14
Remove the belt from the left sprocket
- Lift the belt up and over the left sprocket.
- Move the belt to the front of the mower, out of the way of the belt tensioner.
- During reassembly, ensure all belt teeth are fully seated, otherwise there will not be enough slack for the belt to be installed.
- During reassembly, ensure that the blades are oriented perpendicularly to one another so they don’t collide.
- Spin the left sprocket, with the blade attached underneath, until it is in a safe position, then place the belt on the sprocket.
- Spin both blades to ensure they don’t touch during a 360˚ rotation.
Lift the belt up and over the left sprocket.
Move the belt to the front of the mower, out of the way of the belt tensioner.
During reassembly, ensure all belt teeth are fully seated, otherwise there will not be enough slack for the belt to be installed.
During reassembly, ensure that the blades are oriented perpendicularly to one another so they don’t collide.
Spin the left sprocket, with the blade attached underneath, until it is in a safe position, then place the belt on the sprocket.
Spin both blades to ensure they don’t touch during a 360˚ rotation.
Step 15
Remove the tensioner assembly
- Use a 1/2 inch socket with a 1/2 inch wrench to remove the tensioner bolt and nut.
Use a 1/2 inch socket with a 1/2 inch wrench to remove the tensioner bolt and nut.
Step 16
- Remove the tensioner adjustment nut, bolt, and flange.
Remove the tensioner adjustment nut, bolt, and flange.
Step 17
- Use a 1/2 inch socket to remove the two black tensioner bracket bolts.
Use a 1/2 inch socket to remove the two black tensioner bracket bolts.
Step 18
- Remove the belt tensioner assembly.
Remove the belt tensioner assembly.
Step 19
Remove the right pulley
- Remove the pulley plug cap.
Remove the pulley plug cap.
Step 20
- Use a 1/2 inch socket to remove the right pulley nut on the underside of the tensioner bracket.
Use a 1/2 inch socket to remove the right pulley nut on the underside of the tensioner bracket.
Step 21
- Remove the pulley from the tensioner bracket.
Remove the pulley from the tensioner bracket.
Step 22
- Remove the pulley bolt and washer.
- Remove the bushing from the pulley.
To reassemble your device, follow these instructions in reverse order.
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Author
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Carsten Frauenheim
Member since: 03/10/2020
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