Air System All Models WST WST Air System - The Western Star air system is designed for easy access and adaptability after delivery. - In line air connections to all chassis components are located conveniently under driver’s door cab skirt. - To aid Body Builder connection access, the floor pass through has extra ports in various sizes. This pass through is located under the dead pedal as shown. - Primary supply air is also available by tapping into the supply manifold located under the dash or by using a jumper as show below.
Std Air Switch Airlines and cab pass through are located under the drivers dead pedal In line connections under cab allow for greater flexibility when connecting or changing air control systems Common air switch plumbing Reading WST air schematics Line numbers correspond to bill of material items Jumper between Switches Module numbers designate where parts will be found No. DESCRIPTION 1 COMPRESSOR 2 GOVERNOR 3 RESERVOIR - SUPPLY "SUPPLY" 4A RESERVOIR - SUPPLY "A" 4B RESERVOIR - SUPPLY "B" 4C RESERVOIR - SUPPLY "C" 4D RESERVOIR - SUPPLY "D" 1 2 5 4 3 8 6 7 APPLICATION:
TRACTOR OR TRUCK/TRACTOR WITH SINGLE HAND CONTROL VALVE & WITH MV-3 TYPE DASH VALVE 19 18 ORIGINAL CREATED ON WST TECHNICAL ILLUSTRATOR DO NOT SCALE DRAWING RELEASE NUMBER REV LTR ZONE REVISION DESCRIPTION BY DATE PUR ME APPD ECO92743 2D - - A ITM-37/-16 RMVD;LINE138 MVD TO MANF 07/28/97 CAS ECO95137 2D MIT - - INITIAL RELEASE 06/28/05 WCS P27511-05 2D M1M BCB B REDRAWN IN COREL 06/28/05 NHS Supply air from in dash manifold D 5 RESERVOIR "EXTRA" 6 BRAKE VALVE 7 CHAMBER, SERVICE, CAM 7A CHAMBER, SERVICE, WEDGE 25 880 141 H 25 880 140 H D E S S D D In dash manifold Module Number C 9 10 RELAY VALVE DUAL SUPPLY ( 5.5 PSI CRACK ) 11 RELAY VALVE DUAL SUPPLY ( 4.0 PSI CRACK ) 12 SINGLE CHECK VALVE 13 DOUBLE CHECK VALVE 14 QUICK RELEASE VALVE 15 FRAME TEE 16 TEE 17 AXLE TEE 18 PARK CONTROL VALVE SYSTEM 19 TPV CONTROL - TRAILER AIR SUPPLY 20 TPV (TRACTOR PROTECTION VALVE) 21 HAND CONTROL VALVE 22 SPRING BRAKE / INVERSION VALVE 23 ABS PMV ( PRESSURE MODULATION VALVE ) 24 ATC ( ABS ANTISPIN VALVE ) 25 AIR PRESSUR GAUGE ( DUAL ) 25A AIR PRESSUR GAUGE ( SINGLE ) 8 CHAMBER, SERVICE, PARK , CAM 8A CHAMBER, SERVICE, PARK WEDGE 880 149 B 880 148 B S D E 21 ...
EXH B 880 122 880 116 ...
EXH EXHAUST LINE THROUGH FIREWALL C 871 Item Number D D S S S S B SYSTEM A SYSTEM S S 42 B B B 138 Line sizes noted for all schematics B 26 DRAIN VALVE ( SPITTER VALVE ) 27 DRAIN COCK 28 STOP LAMP SWITCH 29 AIR DRYER 30 QR1-C ( QUICK RELEASE / DOUBLE CHECK VALVE ) 31 GLAD HAND 32 PASSTHROUGH MANIFOLD 33 IN-LINE FITTING 34 FRONT LIMITING VALVE 35 36 PRESSURE RELIEF VALVE 37 PRESSURE PROTECTION VALVE 38 ADJUSTABLE PRESSURE REGULATOR 39 PRESET PRESSURE REGULATOR 40 CONTROL VALVE 41 BP-R1 ( BOBTAIL VALVE ) 42 DC-4 ( DOUBLE CHECK VALVE ) 43 DS-2 ( DOUBLE CHECK VALVE ) D D D 43/27 42 IN CAB MANIFOLD AIR ACCESSORIES B WST three port air switch utilizes a jumper for air common air supply between option switches which cuts the air lines required for dash plumbing in half SYMBOL NYLON HOSE SYMBOL DESCRIPTION B A LINE SIZE LEGEND 1/4 #4 S SUPPLY 3/8 #6 D DELIVERY PORT LEGEND CAB PASS THRU SEE PORT DIAGRAM IN MOD 880 FOR HOLE USAGE DETAILS 1 QUANTITY ITEM NUMBER DESCRIPTION REF AIR SYSTEM PIPING - CAB PIPING 2 880 138 WESTERN STAR TRUCKS INC.
A G C D E F 1/2 #8 C CONTROL 5/8 #10 E EXHAUST 3/4 #12 R RESERVOIR 1/8 NONE #8 TEFLON A ACCESSORY 1 TO PRESSURE PROTECTED AIR SUPPLY 2 IF PASS THROUGH IS FULLY POPULATED USE FIREWALL DRILLING AND BULKHEAD FITTING 728B1-3509 MATERIAL APPROVAL DATE DRAWN BY DATE CHECKED BY DATE THIRD ANGLE PROJECTION UNIT OF MEASURE RESPONSIBLE ENGINEER DATE APPROVED BY DATE MFG ENGR/PURCH AGENT DATE M.MAHLER M.MAHLER N.STREHL 06/28/05 I.LEVKIV T H E I N F O R M AT I O N C O N TA I N E D H E R E I N I S P R O P R I E TA RY D ATA , A N D I S N O T F O R DISSEMINATION OR DISCLOSURE, IN WHOLE OR IN PART, FOR ANY PURPOSE OTHER THAN THAT FOR WHICH IT IS SUBMITTED, EXCEPT AS AUTHORIZED IN WRITING BY WESTERN STAR TRUCKS.
- - 06/28/05 06/28/05 06/28/05 A SUBSIDIARY OF B.BAER UNLESS OTHERWISE NOTED, DIMENSIONS AND TOLERANCES ARE DEFINED ACCORDING TO ASME STANDARD Y1 4.5M-1994, WITH EXCEPTIONS PER FREIGHTLINER EOSM 09E0K17. 06/28/05 LLC R NTS A B 8 7 6 5 4 3 H 5/32 NONE ITEM NUMBER 1 2 DESCRIPTION DESCRIPTION SUPPLEMENTARY DESCRIPTION ITEM/DRAWING NUMBER REVISION LETTER SHEET NUMBER WST MODELS,CAB AIR PIPING 728B1-3509 1 AIR SYSTEM PIPING OF 1 Lighting Harnnes Items numbered for identification in description block Page 1A-19 Rev (2.3) - Feb 2015