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Appendix III — Special Applications

Meritor WABCO

Maintenance Manual 34 (Revised 03-16)

Meritor WABCO System Saver Series Single Cartridge Air Dryer Component Replacement
Guide — Dedicated Purge

Figure 6.9

Figure 6.9

O-RIN

HEATER ASSEMBLY

DESICCANT CARTRID

PRESSURE RELIEF VALVE

PUR

E VALVE ASSEMBLY

OUTLET CHECK
VALVE ASSEMBLY

TURBO CUT-OFF
VALVE ASSEMBLY

1800

1200

Spring not used with U Series dryers.

4003885

Содержание 1200E

Страница 1: ...Maintenance Manual 34 System Saver Series Single Cartridge Air Dryers System Saver Series 1200E P U 1800E P U 1200 Plus MCP Revised 03 16...

Страница 2: ...azards are associated with the processes procedures described These may cause death or injury in any form if the instructions in the operational or procedural task are not followed precisely Warnings...

Страница 3: ...Air Pressure Checks Operational Test for System Saver Series Air Dryers Regeneration and Purge Style 32 Pressure Controlled Check Valve Test Regeneration Style Only 34 Section 4 Appendix I Glossary D...

Страница 4: ...Notes...

Страница 5: ...ver 1000 1200 and 1200E Series and System Saver TWIN Air Dryers and Modification Instructions for Units Equipped with Alcohol Evaporators provides installation instructions To order literature visit o...

Страница 6: ...sture is retained by the desiccant Moisture that condenses out also collects in the base of the dryer When the compressor unloads the water is expelled and dried air flows back through the dryer dryin...

Страница 7: ...dryer at the inlet port Moisture laden air and contaminants pass through the desiccant Moisture is retained by desiccant moisture also collects in the base of the dryer Contaminants are removed as ai...

Страница 8: ...10 psi 69 kPa is taken from the supply and secondary tanks for the regeneration Back flow dries desiccant preparing it for the next cycle On 1200 P UP 1800 P and UP Dry air flows from the separate pur...

Страница 9: ...ection 6 Figure 1 5 Figure 1 5 1002141c PURGE VALVE EXHAUST COMPRESSOR DISCHARGE LINE COMPRESSOR CONTROL PURGE PORT COMPRESSOR INTAKE LINE PRESSURE CONTROLLED CHECK VALVE SUPPLY TANK SYSTEM RESERVOIRS...

Страница 10: ...03 16 Figure 1 6 Figure 1 6 4012522a COMPRESSOR DISCHARGE LINE PURGE VALVE EXHAUST COMPRESSOR CONTROL PURGE PORT DRYER INLET PORT COMPRESSOR INTAKE LINE SUPPLY TANK SYSTEM RESERVOIRS ONE WAY CHECK VAL...

Страница 11: ...Plus Series air dryers with Multi Circuit Protection Refer to Section 2 for instructions for removal of old parts and installation of new parts Figure 1 7 Figure 1 7 1002146b SYSTEM SAVER 1200 OR 180...

Страница 12: ...nual 34 Revised 03 16 Figure 1 8 Figure 1 8 4007692a PRESSURE RELIEF VALVE DESICCANT CARTRIDGE SYSTEM SAVER 1200 PLUS SERIES AIR DRYER OUTLET CHECK VALVE ASSEMBLY GOVERNOR O RING PURGE VALVE ASSEMBLY...

Страница 13: ...Figure 1 9 Figure 1 9 4011774a PURGE VALVE ASSEMBLY HEATER ASSEMBLY GOVERNOR OUTLET CHECK VALVE ASSEMBLY O RING TURBO CUT OFF VALVE ASSEMBLY PRESSURE RELIEF VALVE DRAIN VALVE DESICCANT CARTRIDGE SYST...

Страница 14: ...the filter elements and desiccant needed to filter and dry system air Spin on spin off design allows quick and easy maintenance The System Saver 1800 Series cartridge is 3 2 inches 81 mm taller than...

Страница 15: ...out the purge valve during a compressor unload cycle Figure 1 14 Figure 1 14 Pressure Controlled Check Valve PCCV Used with System Saver Series regeneration style air dryers The PCCV is usually mounte...

Страница 16: ...type compressors Figure 1 19 Figure 1 19 ECON Valve This valve must be installed if System Saver 1200 Series air dryers NOT DESIGNATED E are used with Holset E type compressors This valve is not requ...

Страница 17: ...dryer purge Figure 1 24 Figure 1 24 Pressure Protection Elements Ports that are located directly on the air dryer The eight ports are directly connected to the primary secondary and any auxiliary air...

Страница 18: ...necessary Check the entire air system for leaks and repair as necessary When draining air tanks before servicing the air dryer check for water and or oil that may have accumulated in the tanks Water a...

Страница 19: ...e cycle and flow is noticeably stronger at high engine RPM especially under load Turbo cut off valve leaking No pressure build up in system high compressor discharge line pressure Valve stuck in close...

Страница 20: ...snap ring washer spring valve body and O ring 3 Clean and inspect the valve bore If the bore is damaged so that a tight seal cannot be maintained replace the air dryer 4 Install the new O ring on the...

Страница 21: ...ems Parts To obtain this publication refer to the Service Notes page on the front inside cover of this manual NOTE Use the grease included with the replacement kit to lubricate O rings and seals Syste...

Страница 22: ...ut out pressure of the compressor through signal lines from the system reservoir as well as the compressor head controlling onload and offload Use only the Meritor WABCO governor specified for use wit...

Страница 23: ...e you have all of the parts required to replace the purge valve Use the grease included with the replacement kit to lubricate O rings and seals Do not grease the rubber seat If shims are included in t...

Страница 24: ...bly Figure 2 16 Figure 2 16 10 Install spring in valve head fit valve head assembly into bore NOTE If shims are included in the replacement kit they must be installed above and below the spring If the...

Страница 25: ...e all of the parts required to replace the bypass valve Use the grease included with the replacement kit to lubricate O rings and seals Figure 2 19 2 Remove the snap ring cover spring and valve body 3...

Страница 26: ...e relief valve in the UP position or within 30 of vertical Figure 2 22 If not installed in the correct position serious personal injury and damage can result NOTE The threads on the replacement pressu...

Страница 27: ...lug from the heater receptacle 3 Remove the three mounting bolts Remove the air dryer from its mounting location Figure 2 24 and Figure 2 25 Figure 2 24 Figure 2 25 4 Attach the new unit to the frame...

Страница 28: ...by jacks Jacks can slip and fall over Serious personal injury and damage to components can result NOTE The pressure protection elements are not serviceable on the System Saver 1200 Plus with MCP The e...

Страница 29: ...the compressor discharge line is long enough to keep inlet air below 175 F 80 C Figure 3 1 Refer to Section 5 Figure 3 1 Extreme Cold Make sure the air dryer heater is in good working order by runnin...

Страница 30: ...replace if necessary Make sure governor to dryer port 4 line is free of water oil Remove and inspect purge valve and clean water oil from top of piston Debris under purge valve seat such as particles...

Страница 31: ...rflow from purge valve after initial purge blast dryer decompression Air dryer not connected to supply tank or connections reversed at dryer Yes No Verify proper dryer installation per system diagram...

Страница 32: ...s Yes Inspect compressor Repair replace per manufacturer s instructions Air flows out of purge valve entire time compressor is unloaded NOTE With U Series air dryers the compressor unloads through the...

Страница 33: ...Yes Yes Inspect valve bore for wear If a new turbo cut off valve does not seal in a clean lubricated bore replace the air dryer Piston is broken Yes Yes Replace the turbo cut off valve Air dryer froze...

Страница 34: ...Water in tanks often following aftermarket installation or when dryer is a replacement for a competitive brand Pressure controlled check valve not installed in correct tank or not installed at all Yes...

Страница 35: ...st of air followed by a mild flow which will last 10 45 seconds 5 Shut off the engine 6 Apply a soap solution to each connection that contains pressurized air Check the connections to see if soap solu...

Страница 36: ...ther air system problems or the pressure controlled check valve is not operating correctly Identify and repair all air leaks and air system problems Clean the Regeneration and Outlet Check valves Disc...

Страница 37: ...valve located between the air dryer and the secondary air tank usually at the supply tank Secondary air gauge not plumbed to the secondary air system Use a calibrated air gauge in the secondary tank...

Страница 38: ...re level in the air system supply tank which triggers the compressor unload cycle Dedicated Purge Tank A separate air tank used exclusively for holding air used in an air drying cycle This tank elimin...

Страница 39: ...here are no valves or other devices in the dryer to supply tank line to prohibit or restrict the flow of air back from the supply tank to the air dryer Feed purge valve by a direct line from the air g...

Страница 40: ...mal running Two minutes maximum Occasional three times per day maximum Seven minutes Compressor unloaded time Minimum for purge cycle 20 seconds Maximum duty cycle Compressor on time total running tim...

Страница 41: ...valve eliminates the need for the external Econ valve Figure 6 2 Figure 6 1 PURGE VALVE EXHAUST COMPRESSOR DISCHARGE LINE COMPRESSOR COMPRESSOR INTAKE LINE PRESSURE CONTROLLED CHECK VALVE SUPPLY TANK...

Страница 42: ...s manual for installation instructions To replace an ECON valve that is mounted directly to the air dryer follow these instructions 1 Unscrew and remove all of the lines from the Econ valve at the ai...

Страница 43: ...place the Econ valve assembly on Meritor WABCO System Saver 1200E air dryers follow these instructions 1 Remove the Econ valve assembly A Using a flare wrench loosen the compression nuts on each end o...

Страница 44: ...ications following the torque instructions in the kit Alcohol Evaporator Check the vehicle s air system for an alcohol evaporator NOTE Typically an alcohol evaporator will be installed in the line bet...

Страница 45: ...E COMPRESSOR COMPRESSOR INTAKE LINE PRESSURE CONTROLLED CHECK VALVE SUPPLY TANK WET SYSTEM RESERVOIR INTERNAL CHECK VALVE DRYER INLET PORT UNLOADER LINE RESERVOIR TO GOVERNOR LINE 1800 1200 SYSTEM RES...

Страница 46: ...GE LINE COMPRESSOR COMPRESSOR INTAKE LINE PRESSURE CONTROLLED CHECK VALVE SUPPLY TANK WET SYSTEM RESERVOIR INTERNAL CHECK VALVE DRYER INLET PORT UNLOADER LINE 1800 1200 SYSTEM RESERVOIR SUPPLY LINE DR...

Страница 47: ...em Saver Series Single Cartridge Air Dryer Component Replacement Guide Dedicated Purge Figure 6 9 Figure 6 9 O RING HEATER ASSEMBLY DESICCANT CARTRIDGE PRESSURE RELIEF VALVE PURGE VALVE ASSEMBLY OUTLE...

Страница 48: ...ge Lube and install O ring Install replacement cartridge T PRESSURE RELIEF VALVE Unscrew and remove old valve Screw replacement valve into dryer or Street Tee fitting Do not exceed recommended torque...

Страница 49: ...Revised 03 16 7 Appendix IV Exploded View of System Saver 1200 Plus Series Air Dryer Figure 7 1 Figure 7 1 4007692a PRESSURE RELIEF VALVE DESICCANT CARTRIDGE SYSTEM SAVER 1200 PLUS SERIES AIR DRYER O...

Страница 50: ...to prevent the vehicle from moving 3 Drain the entire air system Open all of the drain valves on all of the reservoirs 4 Ensure that all residual pressure has been released and the air dryer has been...

Страница 51: ...ndix VI Exploded View of System Saver 1200 Plus Series with Multi Circuit Protection Figure 9 1 Figure 9 1 4011774a PURGE VALVE ASSEMBLY HEATER ASSEMBLY GOVERNOR OUTLET CHECK VALVE ASSEMBLY O RING TUR...

Страница 52: ...Meritor WABCO Vehicle Control Systems 2135 West Maple Road Printed in USA Troy MI 48084 7121 866 OnTrac1 668 7221 Copyright 2016 Revised 03 16 meritorwabco com Meritor Inc Maintenance Manual 34 16579...

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