15. Rotate the star wheel on the adjustment bolt
to see that it can easily rotate with a “click” in
one direction and cannot easily rotate in the
other direction.
16. Connect the hydraulic line and install the
brake drum and wheel.
17. Bleed the hydraulic system after all brakes are
assembled. (See page 20).
Adjust DSH Brake
1. Adjust the DSH brake through the forward
adjustment slot (toward the front of the
vehicle) at the bottom of the backing plate.
Figure 2.7.
2. Insert an adjusting tool through the forward
slot of the backing plate to engage the star
wheel on the adjustment bolt. To move the
shoes closer to the brake drum, move the tool
handle down. The adjusting tool pivots
against the backing plate slot and rotates the
star wheel in the direction opposite to the
handle movement.
3. Adjust the linings until a light resistance can
be felt when the brake drum is rotated. Then
adjust in the other direction until the brake
drum can just rotate freely.
4. If the brake has a parking brake lever, adjust
the parking cable until a light resistance can
be felt when the brake drum is rotated. Then
adjust the cable in the opposite direction until
the brake drum can rotate freely. Apply and
release the parking brake to see that it
operates correctly.
7
Section 2
Hydraulic Brakes
c. Push rod ends of the wheel cylinder.
d. Anchor pins, anchor pin holes and anchor
pin slots.
2. Install the wheel cylinder to the backing plate.
Tighten the wheel cylinder capscrews to
15-20 lb. ft. (20-27 N•m).
3. If used, install the parking brake lever on the
trailing shoe and the parking brake link on the
leading shoe.
4. Install the two anchor pins in the holes in the
backing plate.
5. Put the trailing shoe in position into the
anchor pin slot and engage it with the wheel
cylinder push rod.
6. To install the two shoe retainer clips, engage
the clip on to the retainer pin and rotate the
clip down until it sets flat on the shoe.
7. If used, install the parking cable through the
backing plate and engage the cable in the
parking brake lever. Install a cable retainer
bracket (not supplied by Meritor) where the
cable enters through the backing plate.
8. Install the stamped automatic adjustment
spring on the leading shoe.
9. Assemble a star wheel adjustment bolt and
shoe spring on both shoes while you put the
leading shoe in position into the anchor pin
slot and engage it with the wheel cylinder
push rod.
10. If used, install the parking link to engage with
the parking lever slide pin.
11. Hold the shoe in its correct position and
install the shoe hold-down spring clip on to
the retainer pin.
12. Install the green shoe return spring on to the
leading shoe for right hand brake and onto
trailing shoe for left hand brake.
13. Install the short automatic adjustment wire to
connect the pivot to the pin near the anchor
location. Install the long automatic
adjustment wire to connect the pivot to the
stamped automatic adjustment spring.
14. Install the automatic adjustment pivot and
spacer to the leading shoe on its shoulder
bolt fastener. Be careful that the pivot is not
pinched under the edge of the shoulder.
Figure 2.7
BRAKE ADJUSTMENT
STARWHEEL
(TOWARD FRONT OF VEHICLE)
BACK VIEW
