Adjusting lever (ratchet) of a Kamaz car
The adjusting lever is designed to reduce the gaps between the pads and the brake drum, which increase due to wear of the friction linings.
Fig.1. Adjustment Lever: 1 - Cover, 2 - Rivet, 3 - Gear, 4 - Plug, 5 - Worm, 6 - Body, 7 - Sleeve, 8 - Stop Bolt, 9 - Detent Spring, 10 - Detent Ball , 11 - worm axis, 12 - oiler
The adjusting lever has a steel body (Fig. 1) with a sleeve 7; in the housing there is a worm gear with a splined hole for mounting it on an expanding fist and a worm 5 with an axis 11.
To fix the axis of the worm, there is a locking device, the ball 10 of which enters the holes on the axis 11 of the worm under the action of the spring 9, which abuts against the bolt 8 with a stop.
The gear wheel 3 is kept from falling out by covers 1 attached to the body 6 of the lever.
When the axle is turned (at the square end), the worm turns the wheel, and with it the expanding fist, pushing the pads apart and reducing the gap between the pads and the brake drum.
When braking, the adjusting lever is turned by the brake chamber rod.
Before adjusting the gap, unscrew the locking bolt 8 by 1-2 turns, thereby removing the stop from the ball, after adjusting the bolt 8 securely tighten.