BOB Duallie MA0501A User Manual download pdf (Page 5)

tracking instructions

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Phone: (208) 375-5171 Fax: (208) 375-5172, BOB Trailers, Inc. 5475 Gage St. Boise, Idaho 83706

We have added an enhanced feature to our jogging strollers that

allows the customer to fine tune the tracking of their stroller. This

document is designed to supplement to the Owners Manual. Proceed

with initial setup and use of your stroller and only refer to this

document if you believe there is a tracking problem with your

stroller.

All fixed three wheeled vehicles can be easily influenced to deviate

from a straight path. In some cases strollers can have or develop a

tendency to pull to the right/left due to many different factors including

tire pressure, wheel installation, road conditions and manufacturing

tolerances. If you find your BOB stroller to significantly track or pull

to the left or right during use on flat terrain, follow the sequence of

instructions below.

Tracking Adjustment Instructions:

The fine-tuning of desired tracking should be performed in the following

sequence.

1) Confirm the rear wheels are installed correctly. Refer to step 4 of

the Owners Manual for installation instructions.

2) Confirm the front wheel is installed correctly. Refer to step 6 of the

Owners Manual for correct installation instructions. When tightening

the quick release make sure the front wheel is pushed straight and

equally toward the back of the dropouts.

3) Check the tire pressure, making sure the tire pressure is exactly

the same on all three tires.

4) Roll test the stroller as described below. It is recommended you

have someone assist with this task in order to catch and return the

stroller. Fig. 1 illustrates the roll test process.

a. Empty the stroller. Do not roll test with a child or any occupant

in the stroller.

b. Find a location on level ground approximately 16 ft. long. It is

helpful to use an existing straight-line as a frame of reference such

as the edge of the sidewalk or a painted line in a playground.

c. Align the stroller so the rear wheels are perpendicular to the

straight line. Push and release the stroller trying carefully not to

influence its direction to the left or right so it rolls straight down the

test path. This step should be performed more than once to make

sure the stroller was not biased left or right by the pushing action.

d. If the stroller consistently pulls to the left or right when pushed

straight, proceed with the steps below until tracking is satisfactory.

Fig 1. illustrates how to interpret the results.

Reference convention: Left and right are described as viewed from

the operators frame of reference (behind the stroller). Example: The

parking brake lever is on the left side of the handlebar.

5) Rotate the front axle. Often tracking can be corrected by simply

rotating the front wheel axle.

a. Open the front wheel quick release, step 6 of the Owners Manual.

Rotate axle 90 degrees in dropout, Fig. 2 and retighten quick

release.

b. Perform roll testing again. If the stroller still consistently pulls to

the left or right when pushed straight, proceed to next step.

6) Reorient the front wheel. Many times the tracking can be corrected

by removing the front wheel and flipping it around and reinstalling it.

a. Open the front wheel and front brake quick releases, step 6 of

the Owners Manual. Remove the front wheel and flip it around so

the quick release lever is on the opposite side, Fig. 3. Reinstall the

front wheel, secure the

wheel and brake quick

release levers.

b. Perform roll test again.

If the stroller still

consistently pulls to the left

or right when pushed

straight, proceed to next

step.

7) Fine tune tracking of

stroller is accomplished by

using the adjustment knobs

shown in Fig. 4.

If your stroller pulls to the

right, proceed as follows:

a. Open quick release lever

on front wheel, step 6 in

the Owners Manual. It is

not necessary to remove

the front wheel.

b. Turn the right knob

clockwise 1-full turn, as

shown in Fig. 5, thereby

pushing the right side of

the wheel forward.

Retighten quick release.

c. Repeat Roll test. If

stroller still pulls to the right,

repeat steps A and B.

If your stroller pulls to the

left, proceed as follows:

a. Open quick release lever

on front wheel, step 6 in

the Owners Manual. It is

not necessary to remove

the front wheel.

b. Turn the left knob

clockwise 1-full turn, as

shown in Fig. 6, thereby

pushing the left side of the

wheel forward. Retighten

quick release.

c. Repeat Roll test. If

stroller still pulls to the left,

repeat steps A and B.

Turn Knob Clockwise

1 Full turn

Fig. 5 Right Adjust Knob

Fig. 6 Left Adjust Knob

Turn Knob Clockwise

1 Full turn

Wheel Reoriented

With Quck Release

Lever On Opposite

Side

Fig. 3

Reorient Front Wheel

Rotate axle 90

Fig. 2 Rotate Axle

Left

Adjust Knob

(Fig. 6)

Right

Adjust Knob

(Fig. 5)

Front

Wheel

Fig 4. Adjust Knobs

Fig. 1

Stroller Roll Test

Top View Of Stroller

16

Stroller pulls

to left

Wheel axles

perpendicular

to straight line

Stroller pulls

to right

MA0501A

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