Brother International HE-800B Instruction Manual - English - Page 22

Installing the treadle connecting rod, Adjusting the treadle pressure

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3. INSTALLATION 3-11. Installing the treadle connecting rod (1) Connecting rod (2) Nut 4750M 4751M 4752M Adjusting the treadle pressure If the machine starts running when your foot is simply resting on the treadle, or if the treadle pressure is too weak, adjust the position (a to d) at which the treadle spring (3) is hooked onto the treadle lever (4). The treadle pressure will increase from position a to position d. Adjusting the treadle return pressure 1. Loosen the nut (5) and turn the bolt (6). * The treadle return pressure becomes heavier as the bolt (6) is tightened, and becomes lighter as the bolt (6) is loosened. 2. Tighten the nut (5). Adjusting the treadle stroke Remove the nut (2), and then move connecting rod (1) from the position in figure to the position in figure . The treadle stroke will increase by approximately 1.25 times. * This adjustment will also affect the treadle pressure and the treadle return pressure, so these settings should be readjusted if necessary. 13 HE-800B

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HE-800B
3. INSTALLATION
13
3-11. Installing the treadle connecting rod
(1) Connecting rod
(2) Nut
Adjusting the treadle pressure
If the machine starts running when your foot is simply resting on the treadle, or if the treadle pressure is too weak, adjust the
position (a to d) at which the treadle spring (3) is hooked onto the treadle lever (4).
The treadle pressure will increase from position a to position d.
Adjusting the treadle return pressure
1. Loosen the nut (5) and turn the bolt (6).
* The treadle return pressure becomes heavier as the bolt (6) is tightened, and becomes lighter as the bolt (6) is loosened.
2. Tighten the nut (5).
Adjusting the treadle stroke
Remove the nut (2), and then move connecting rod (1) from the position in figure <A> to the position in figure <B>.
The treadle stroke will increase by approximately 1.25 times.
* This adjustment will also affect the treadle pressure and the treadle return pressure, so these settings should be readjusted
if necessary.
4750M
4752M
4751M