TM-9-2320-273-20

TRUCK TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE

NOVEMBER 1980

TM-9-2320-273-20 - Page 122 of 1500

TM 9-2320-273-20

2-64. SYSTEM COMPONENTS (Continued).

D.

RESERVE AIR RESERVOIR. Two reserve air reservoirs are used on M915, M916, and

M918; three on M917, M919, and M920. (See illustrations in para 2-65 thru 2-70.)

E.

RELAY VALVE. Pressure from cab brake valves control flow of air from brake reservoirs

to rear axle brake chambers. Applies rear brakes faster and more firmly than if they were

actuated directly by air pressure in control lines from cab.

2-74