Operation Preventive Maintenance, Removing

SD-07-2601

Bendix® C-5™Cut-Out Cock

OPERATING HANDLE

LOCK NUT

STEM

WASHER

O-RING

CAP NUT

REDUCER

BUSHING

O-RING	BODY	VALVESEATS VALVE	CLAMPING
	BODY		STUD
			STUD

FIGURE 1

DESCRIPTION

The C-5™cut-out cock is a manually operated on-off valve. Cut-out cocks are used in an air brake system where a manual shut off air lines is desirable such as in trailer and trailer dolly systems.

OPERATION

Note that in Figure 1 the C-5™cut-out cock uses a metal ball valve between two valve seats. Rotating the ball valve 90° will either open or close the air passage through the cut-out cock.

PREVENTIVE MAINTENANCE

Every six months, 1800 operating hours, or 50,000 miles the cut-out cock should be checked for leakage around the ball valve and past the stem o-ring. Once each year, 3600 hours, or 100,000 miles the C-5™cut-out cock should be disassembled, cleaned, and inspected for signs of wear or deterioration.

LEAKAGE CHECK

With the valve in the closed position and air pressure present on either side, a soap solution is applied to the side open to atmosphere. A leakage of not more than a 1" bubble in 5 seconds is permitted.

NOTE: Leakage should be checked in each direction since it is possible for the valve to seal in one direction but not the other.

If the cut-out cock leaks excessively or if wear or deterioration is noted during routine maintenance, it is recommended that it be replaced with a new unit or repaired with genuine Bendix parts.

REMOVING AND INSTALLING

REMOVING

Block and hold vehicle by means other than air brakes. Completely drain all reservoirs. Disconnect air lines from both sides of the cut-out cock.