Difficulty

Moderate

Steps

35

Time Required

                          2 - 4 hours            

Sections

1

  • Transmission Assembly
  • 35 steps

Flags

2

In Progress

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  • BackTORO 30" Personal Pace TimeMaster Mower

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Introduction

This is a moderately difficult replacement that will take approximately 2 1/2 hours and potentially require a few niche tools to be purchased.

Successful completion of this replacement will fix the self drive system.

What you need

Step 1

              Precautionary Measures               
  • Remove spark plug wire and spark plug using a 5/8" socket to prevent accidental ignition of mower.

Remove spark plug wire and spark plug using a 5/8" socket to prevent accidental ignition of mower.

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Step 2

  • Prop up the rear end of the lawnmower using a jack stand, scissor jack, or some other stable platform. Both rear wheels should be off the ground.
  • Use 2 wedges/wood blocks to keep the front wheels stationary.

Prop up the rear end of the lawnmower using a jack stand, scissor jack, or some other stable platform. Both rear wheels should be off the ground.

Use 2 wedges/wood blocks to keep the front wheels stationary.

Step 3

              Removing first wheel               
  • Set tire-height adjustment lever to forward-most position (past “A”).

Set tire-height adjustment lever to forward-most position (past “A”).

Step 4

  • Remove center nut from wheel using 9/16" socket.
  • If the nut is stuck, apply WD-40 to the site and wait a few minutes.

Remove center nut from wheel using 9/16" socket.

If the nut is stuck, apply WD-40 to the site and wait a few minutes.

Step 5

  • Remove the wheel, washer, and plastic cover.

Remove the wheel, washer, and plastic cover.

Step 6

  • Pry off the metal gear-retaining clip using a flathead screwdriver.
  • Remove gear.

Pry off the metal gear-retaining clip using a flathead screwdriver.

Remove gear.

Step 7

  • Remove the snap ring using snap ring pliers.

Remove the snap ring using snap ring pliers.

Step 8

  • Use a 1/2" socket wrench to remove the bolt holding the bearing assembly from the wheel.

Use a 1/2" socket wrench to remove the bolt holding the bearing assembly from the wheel.

Step 9

  • Remove the wheel bearing.
  • A flathead screwdriver may help to pry off a stuck bearing.

Remove the wheel bearing.

A flathead screwdriver may help to pry off a stuck bearing.

Step 10

              Remove Second Wheel               
  • Refer to steps 3-9

Refer to steps 3-9

Step 11

              Removing the old transmission               
  • Flip the lawnmower so that the underside is visible.
  • Ensure that the gas tank side is on the top.

Flip the lawnmower so that the underside is visible.

Ensure that the gas tank side is on the top.

Step 12

  • Remove the drive belt from the two mounted locations at the transmission housing and engine shaft.

Remove the drive belt from the two mounted locations at the transmission housing and engine shaft.

Step 13

  • Disconnect transmission stabilizing spring.

Disconnect transmission stabilizing spring.

Step 14

  • Remove the plastic covers (3) from the transmission shaft.

Remove the plastic covers (3) from the transmission shaft.

Step 15

  • Use a 3/8" socket wrench to remove the bolts from the supporting tab.

Use a 3/8" socket wrench to remove the bolts from the supporting tab.

Step 16

  • Remove the transmission from the underside of the lawnmower.

Remove the transmission from the underside of the lawnmower.

Step 17

  • Remove the drive cable from the transmission housing.
  • Needle nose pliers may help in removing the drive cable.
  • Ensure that the large spring located on the right side of the picture is disconnected from the transmission housing as well.

Remove the drive cable from the transmission housing.

Needle nose pliers may help in removing the drive cable.

Ensure that the large spring located on the right side of the picture is disconnected from the transmission housing as well.

Step 18

              Installing the new transmission               
  • Re-attach the drive cable at the cable mounting point of the new transmission.

Re-attach the drive cable at the cable mounting point of the new transmission.

Step 19

  • Slide on the transmission support tab to the transmission shaft.
  • Slide transmission shaft back into slot.

Slide on the transmission support tab to the transmission shaft.

Slide transmission shaft back into slot.

Step 20

  • Re-attach the springs to the transmission housing.

Re-attach the springs to the transmission housing.

Step 21

  • Use a 3/8" socket wrench to install the 2 bolts on the bearing support tab to the underside of the lawnmower.

Use a 3/8" socket wrench to install the 2 bolts on the bearing support tab to the underside of the lawnmower.

Step 22

  • Re-install the belt to the two mounting points.
  • Twisting the transmission housing counterclockwise will allow for the belt to stretch into position easier.

Re-install the belt to the two mounting points.

Twisting the transmission housing counterclockwise will allow for the belt to stretch into position easier.

Step 23

  • Re-attach the plastic covers (3) to the transmission shaft.

Re-attach the plastic covers (3) to the transmission shaft.

Step 24

              Installing the wheels               
  • Flip the lawnmower back to its original position.
  • Place the scissor jack and wood blocks to support the lawnmower.

Flip the lawnmower back to its original position.

Place the scissor jack and wood blocks to support the lawnmower.

Step 25

              Reattaching the Wheel               
  • Re-install the wheel bearing and bolt on the right-side wheel using a 1/2" socket wrench.

Re-install the wheel bearing and bolt on the right-side wheel using a 1/2" socket wrench.

Step 26

  • Secure a clamp between the gold rod assembly and the mower sidewall to ensure that the components added next won’t slide off.

Secure a clamp between the gold rod assembly and the mower sidewall to ensure that the components added next won’t slide off.

Step 27

              Reattaching the Wheel Continued               
  • On the other side, re-install the height adjustment lever, wheel bearing, and bearing bolt using a 1/2" socket wrench.

On the other side, re-install the height adjustment lever, wheel bearing, and bearing bolt using a 1/2" socket wrench.

Step 28

  • Re-install the snap ring using a pair of snap ring pliers. There is a groove in the rod that the snap ring must fit around.

Re-install the snap ring using a pair of snap ring pliers. There is a groove in the rod that the snap ring must fit around.

Step 29

  • Re-install gear.

Re-install gear.

Step 30

  • Use a flathead screwdriver to re-install the metal gear-retaining clip.

Use a flathead screwdriver to re-install the metal gear-retaining clip.

Step 31

  • Re-install the wheel cover and the washer.

Re-install the wheel cover and the washer.

Step 32

  • Re-install wheel and use a 9/16" socket wrench to re-attach the center nut.

Re-install wheel and use a 9/16" socket wrench to re-attach the center nut.

Step 33

  • Return to the other side and remove the clamp.

Return to the other side and remove the clamp.

Step 34

              Reattaching the Second Wheel               
  • Refer to Steps 25, 27-32

Refer to Steps 25, 27-32

Step 35

              Installing the spark plug               
  • Use a 5/8" socket wrench to re-install the spark plug.
  • Re-attach the spark plug cable.

Use a 5/8" socket wrench to re-install the spark plug.

Re-attach the spark plug cable.

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Author

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                    Zachary Perry                     

Member since: 04/12/2022

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