TM 10-3930-653-14&P Fig. 4-443.  Master Cylinder 1. Yoke 4. Dust cover 7. Secondary cup 10. Spring 2. Lock nut 5. Stop wire 8. Piston 11. Check valve 3. Push rod 6. Stop washer 9. Primary cup 12. Valve seat WHEEL BRAKE The wheel brake is the internal expansion hydraulic type consisting of brake shoes, springs, a wheel cylinder, an adjuster and backing plates. Two wheel brakes are provided on each end of the front axle. The brake shoe, one end of it being connected to the anchor pin and the other end to the adjuster, is forced against the backing plate with a hold spring and pin. The primary shoe is provided with the parking brake lever and the secondary shoe with the actuator lever of the automatic clearance adjuster. Fig. 4-444.  Wheel Brake 4-224