Difficulty
Moderate
Steps
27
Time Required
30 minutes - 1 hour
Sections
11
- Safety Precautions
- 2 steps
- Grass Bag
- 2 steps
- Belt Cover
- 2 steps
- Left Belt Pulley
- 7 steps
- Left Sprocket Belt Removal
- 1 step
- Motor Belt Guide
- 2 steps
- Air Cleaner Cover
- 2 steps
- Engine Guard
- 2 steps
- Right Sprocket
- 4 steps
- Right Spindle Shaft
- 1 step
- Right Spindle
- 2 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 belt guide
- Use a 3/8 inch socket to remove the two screws securing the belt guide.
Use a 3/8 inch socket to remove the two screws securing the belt guide.
Step 16
- Remove the belt guide.
Remove the belt guide.
Step 17
Remove the air cleaner cover
- Loosen the knob on top of the air cleaner cover, on the top side of the motor.
Loosen the knob on top of the air cleaner cover, on the top side of the motor.
Step 18
- Lift the cover up and off of the air cleaner to remove it.
Lift the cover up and off of the air cleaner to remove it.
Step 19
Remove the engine guard
- Remove the three metric bolts securing the engine guard:
- Two 10 mm bolts
- One 8 mm bolt
Remove the three metric bolts securing the engine guard:
Two 10 mm bolts
One 8 mm bolt
Step 20
- Remove the engine guard.
Remove the engine guard.
Step 21
Remove the engine brake
- Use an impact wrench with a 3/4 inch socket to remove the right sprocket bolt.
- If necessary, use a punch or screwdriver to lock the sprocket in place during removal, lining up the hole in the sprocket with the hole in the blade guard.
Use an impact wrench with a 3/4 inch socket to remove the right sprocket bolt.
If necessary, use a punch or screwdriver to lock the sprocket in place during removal, lining up the hole in the sprocket with the hole in the blade guard.
Step 22
- Lift up the engine brake.
- Remove the blue motor belt from the engine brake.
Lift up the engine brake.
Remove the blue motor belt from the engine brake.
Step 23
- Remove the engine brake.
- Remove the accompanying washer.
Remove the engine brake.
Remove the accompanying washer.
Step 24
Remove the right sprocket
- Lift the right sprocket and belt up and away from the spindle to remove it.
Lift the right sprocket and belt up and away from the spindle to remove it.
Step 25
Remove the right spindle shaft
- Grabbing the spindle shaft from the bottom, lower it down through the spindle.
- Remove the spindle shaft from underneath the mower.
Grabbing the spindle shaft from the bottom, lower it down through the spindle.
Remove the spindle shaft from underneath the mower.
Step 26
Remove the spindle bolts
- Tilt the mower onto its side so the spindle assembly is facing out.
- This may require two people.
- Use a 1/2 inch socket to remove the four spindle bolts.
Tilt the mower onto its side so the spindle assembly is facing out.
This may require two people.
Use a 1/2 inch socket to remove the four spindle bolts.
Step 27
Remove the spindle
- Remove the spindle.
Remove the spindle.
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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