T4B 54 I Q G G s in Ek 0 I 0 V A 0 W 3Q 0 a J i 1 I Z 18 xy I J 9 l W r JQ V 4 5 Al Q T4B 54 5 Q 1985 86 CK BRAKE BOOSTER HYDRAULIC I 1987 88 RV BRAKE BOOSTER HYDRAULIC 1 ACCUMULATOR KIT Includes item 2 4 820 1 6 BRACKET Mt 4 805 2 O RING Accum 1 N S 17 NUT Mounting Brkt 4 805 3 RING Spool Valve Plug Flet 2 N S 18 BOOT Pedal Rod Not req d for all 4 PLUG Spool VaIve 2 N S appl 1 4 859 5 O RING Spool Vlv Plug 1 N S 19 GROMMET Pedal R0d 2 N S 6 SPRING Spool VaIve 2 N S 20 ROD Pedal 3 4 658 7 HOUSING Boos 2 N S 21 PIN Input Pstn 4 810 8 SCREW W Lk Wa Hsg to Cvr 4 815 22 ROD W Pstn Boos Input Also lncls 9 SEAL Boos Rtn Pipe Ftg 1 4 810 13 14 19 20 23 3 4 658 10 VALVE KIT Accum 4 810 23 SEAL Pstn 1 N S 11 FITTING Rtn Line 4 845 24 STUD Boos to M Cyl Mt 4 805 12 VALVE Spool 2 N S 25 RETAINER Output Push Rod 4 659 13 SEAL Pedal Rod 2 4 810 26 svnme Pm Rm 4 810 14 SEAL Hsg 1 N s 27 RETAINER Psm Rm spr 2 N s 15 COVER Boos Hsg 3 4 815 28 BAFFLE Output Rod Spr 4 659 29 ROD Output Push 4 658 NOTE 1 Part of SEAL KIT Boos Group 4 810 V NOTE 2 Part of BOOSTER Boos Repair Kit Group 4 805 NOTE 3 Not serviced separately for models with Diesel Eng see NOTE 2 1988 GENERAL MOTORS SERVICE PARTS OPEFIATIONS LT TRUCK 52R i 4 000 GROUP 4 80 l 1 88 V