BENDIX MC-12 MODULATOR CONTROLLER ASSY Průvodce řešením problémů Strana 26
- Strana / 70
- Tabulka s obsahem
- ŘEŠENÍ PROBLÉMŮ
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
24
More info: visit www.bendix.com 1-800-AIR-BRAKE (1-800-247-2725)
Push-Pull Valves
Spring
Brakes
S
D
E
E
D
S
PP-1
®
Valve
PP-8
™
Control
Valve
Push-Pull Cont rol Valves
Push-pull control valves are most often mounted
on the vehicle dash board and are used for a variety
of control applications. The PP-1
®
and PP-2
™
valves
are pressure sensitive, normally closed, on/off control
valves which automatically return to the exhaust
(button out) position when supply pressure is below the
required minimum. They may be manually operated
to either position when pressure is above the required
minimum. Pressure settings and button confi guration
and wording may vary, depending on application.
The PP-1
®
control valve is commonly used to control
parking and emergency brakes. This valve was also
used in conjunction with the TP-2
™
tractor protection
valve in pre-FMVSS 121 single circuit tractor air
systems.
Unlike most other push-pull control valves, the PP-8
™
is nonautomatic, and will remain in the applied (button
in) position regardless of delivery or supply pressure.
The PP-8
™
control valve is commonly used to control
the tractor brakes only in the (FMVSS 121-compliant)
dual system.
The PP-3
™
control valve is primarily used to control
the TP-3
®
tractor protection valve in pre-FMVSS 121
tractor systems. It features a tripper piston which
prevents manual override of the emergency application
of trailer brakes.
Trailer Supply Valve (Tractor Protection Control)
The PP-7
™
push-pull control valve is a pressure
sensitive, on/off control valve which will automatically
return to the exhaust (button out) position when supply
pressure is below the required minimum. It may
PP-1
®
Control
Valve
be manually operated to either position when
pressure is above the required minimum. Button
confi guration and wording may vary depending
on application. The automatic exhaust pressure
is 40 psi.
The PP-7
™
valve is used to control the tractor
protection system and is generally identifi ed as
the trailer air supply valve. The valve employs
an air operated interlock in the lower body which
will apply the trailer brakes when the tractor
spring applied parking brakes are applied. The
interlock ensures that the tractor parking brake
can not be applied without the trailer parking
brakes also being applied. Normally this action
will not affect the position of the PP-7
™
valve
button. The interlock of tractor and trailer parking
is a requirement of government regulations (e.g.
FMVSS 121).
PP-7
™
Control
Valve
PP-3
™
Control
Valve
RD-3
™
Valve
(See Page 27)
Release
Front
Rear
Supply
- Air Brake Handbook 1
- The Air Brake Handbook 3
- Device Index 4
- Handbook Section Index 5
- General Precautions 6
- Section 1: An Overview 7
- Bendix Air Compressors 8
- Compressors 10
- Concerns? 11
- Governors and Components 12
- Reservoirs and Components 13
- Air Dryers 14
- Air Dryers and Filters 15
- Dual Circuit Brake Valves 17
- Actuators 19
- Slack Adjusters 20
- Foundation Brakes 21
- Foundation Brakes, continued 22
- Quick Release, Ratio Valves 23
- Ratio, Proportioning Valves 24
- Relay Valves 25
- Push-Pull Valves 26
- Spring Brake Valves 27
- Lever Operated Control Valves 28
- Additional Control Valves 29
- Park Co ntrol Valves 30
- Emergency Systems 30
- Dash Control Modules 31
- Tractor Pr otection Valves 32
- Trailer Spring Brake Valves 33
- ABS Components 37
- Truck a nd Tractor ABS 38
- Operation 38
- ATC Operation 39
- Advanced ABS 40
- Advanced ABS Features 42
- Trailer ABS Components 43
- Trailer ABS Operation 43
- “Curb-Side” 44
- “Driver-Side” 44
- Controllers with PLC 45
- Troubleshooting ABS 46
- A - Display 48
- B - Receiver 48
- C - Sensor 48
- Bendix M odules 49
- Pre-Trip Safety 49
- Inspections 49
- Fan Clutches 49
- Friction 50
- Braking Force 50
- Leverage 52
- Deceleration 53
- Deceleration (continued) 54
- Properties of Compressed Air 55
- The Fundamentals of 57
- Compressed Air Brakes 57
- S-Cam and Air Disc Brakes 58
- Air Brake System Balance 59
- II. Mechanical Systems 60
- NOTE: The EC-60 62
- Contact Bendix 65
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