BENDIX PP-2 Manuel

Kontrol Ünitesi BENDIX PP-2 için çevrimiçi göz atın veya pdf Manuel indirin. BENDIX PP-2 4 sayfaları. Push-pull type control valves

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Bendix

PP-1

, PP-2

Control Valves

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PP-1

VALVE

FIGURE 1 - PUSH-PULL TYPE CONTROL VALVES

DESCRIPTION

The PP valves are push-pull manually operable on-off air

control valves with an exhaust function. Most are pressure

sensitive, so that they will automatically move from the

applied to the exhaust position as supply pressure is

reduced to a certain minimum, depending on the spring in-

stalled. The exception to this is the PP-8

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PP-1

valves which have no spring. The PP-8

has a larger diameter shaft for button mounting so that when

installed on the same panel with other PP valves the

buttons cannot be inadvertently mixed. The PP-8

normally used to operate tractor spring brakes independently

from the trailer.

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The PP-5

valve is unique in having an auxiliary piston in

the lower cover which, upon receiving a pneumatic signal of

18 psi or more, will cause the valve to move from the applied

to the exhaust position from a 100 psi application.

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The RD-3

valve differs slightly in that it normally remains in

the exhaust position and requires a constant manual force

to hold it in the applied position.

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, PP-5

, PP-8

PP-2

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VALVE

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valve and some

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valve also

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valve is

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, & RD-3

Push-Pull Type

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PP-5

VALVE

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The PP-2

valve has an auxiliary port which may be plumbed

into a service brake line to release the spring brakes if a

service application is made, preventing compounding of

forces on the foundation brakes.

PREVENTIVE MAINTENANCE

Important: Review the Bendix Warranty Policy before per-

forming any intrusive maintenance procedures. A warranty

may be voided if intrusive maintenance is performed during

the warranty period.

No two vehicles operate under identical conditions, as a

result, maintenance intervals may vary. Experience is a valu-

able guide in determining the best maintenance interval for

air brake system components. At a minimum, the PP valves

should be inspected every 6 months or 1500 operating hours,

whichever comes first, for proper operation. Should the PP

valves not meet the elements of the operational tests noted

in this document, further investigation and service of the

valve may be required.

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RD-3

VALVE

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PP-8

VALVE