TM  10-3930-638-24&P 1-21.   AXLES   AND   WHEELS 1.  FRONT  AND  REAR  AXLES.  Single  reduction 2.  DIFFERENTIAL  CARRIER.  Integral  part  of  axle; type driven by propeller shafts; front axle is rigidly single reduction unit employs a heavy duty spiral bevel gear. mounted; rear axle is trunnion mounted. Axle includes 3. RIMS AND TIRES. Heavy duty steel rims; pneumatic differential carrier and drum type brakes on each wheel. tires, 15 by 19.5, 8 ply tubeless. 1-22.   BRAKES 1.  PARKING  BRAKE.  Located  on  transmission  output brakes permits brake shoes to center themselves in shaft; drum and shoe type brake. Actuated by lever located brake  drum. next to operator’s seat and connected by cable to parking 3.  HYDRAULIC  BRAKE  VALVE.  Consists  of  power brake actuating lever. section  (provides  power  assist  to  service  brakes)  and 2. SERVICE BRAKES. Floating shoe and drum master cylinder section. Power assist section connected by hydraulic brake located on each wheel. Actuation of the plunger to service brake pedal. 1 - 2 3 .    S T E E R I N G    S Y S T EM 1-12