Rebuilding an air cylinder is a cheap way to restore an air cylinder to proper operation. The internal piston seals will begin to leak air and function of the valve may be compromised. Usually you can diagnose a piston leak when listening for air bypass at the air pilot manifold. There should never be air constantly bypassing out of an air pilot valve. See the attached procedure on how to rebuild an air cylinder.
On Flow Stop cylinders on a CBW, a single piston leak can influence the function of the other valves tied to the same air supply. See the note on how to troubleshoot this problem here.
Video - Why is my shuttle valve leaking air?Rebuild kits/parts are available for most air cylinders. A list of rebuild kits are listed below.
AVD48701 - 4"DUMP BONNET&AIRCYL DBL-ACT
Flow Stop Air Cylinder.
Kit
KZRKDVDA01 - REPAIR KIT 4"DUMP VLV DBL-ACT.
This has been replaced by the
A64DV012.
A64DV012 - ASSY=4" DUMP VALVE N/C FLOW/STOP
Flow Stop Air Cylinder
Kit
KZRKDVDA01 - REPAIR KIT 4"DUMP VLV DBL-ACT.
A64DV004 - BONNET DUMPVAL NC G3 is the drain valve air cylinder for a G3 and a G4 CBW.
Kit
KTWBDVRK01 - DUMPVALVE A64DV004 REPAIR KIT
Air Cylinder Only
Kit
KTWDVACR01 - G3/G4 DRAIN VALVE AIR CYL REPAIR KIT
A64AC001A - N/C DUMP VAL AIR CYL 4+1/2X8 is the drain valve for a classic CBW.
Kit
KTNCDVAC01 - REPAIR KIT A64AC001A
A65AC001 - 7639=AIR-CYL FLOWNOT VLV ASY is the flow not air cylinder.
Kit
KTFNACRK02 - 7639 REPAIR FLO NOT AIR CYL
A14 06400 - BONNET+CYL=4"SS DIVCYL DUMP is the air cylinder for the reuse tank drain.
Kit
KZRDV00100 - REPAIR DUMP VALVE A14 06400
A62 06000 - AIR CYL.-FLOW NOT VALVE - FLOWNOT AT LOAD/UNLOAD
Kit
KTFNACRK01 - 7632 REPAIR FLOW NOT AIR CYL
KZRKDVDA01
KIT PICTURE | COMPONENT | DESCRIPTION | QTY |
---|
| 02 02185 02 02194A 02 18932B 03 01313S 60C132V 02 16021E 60C108V 02 11740D 02 02085 02 02105B 02 16021H 15G220 15G219A 24G020N 60C106V 02 14447B | WASHER=PISTON CUP COMP LIMIT PISTON CUP 2.375X.750=VITON GASKET=DUMPVAL 1/8"RED SILIC +STOP=AIRCYL W/2+11/16STR.SS ORING 2"ID3/16CS VITON75 #329 WASHER 3/8IDX1.250D DUMPVAL ORING 1/2IDX3/16CS VITON #310 SEAT=4"S/S VENT=RED SILICONE UP WASHER=2"OD=PISTON CUP 2.38"ACYL BRASS PISTNCUP WSHR BUMPER=DMPVAL BON'T RED SILC NUTLOK THINHX 3/8-24 SS/NYL LOKNUT 3/8-24 NF2 18-8 SS ROLLED WASH.252ID NYLTITE 25W ORING 5/16IDX1/16CSVITON#011 GASKET=BON 4"S/S DPVAL RED | 2 2 1 1 2 1 2 1 2 1 1 1 1 8 2 1 |
KIT PICTURE | COMPONENT | DESCRIPTION | QTY |
| 15G220 60C108 60C132 02 02105B 02 18932B 24G020N 60C106 06 40065A 02 16021H 02 02194 | NUTLOK THINHX 3/8-24 SS/NYL ORING 1/2IDX3/16CS BUNA70#310 ORING 2"IDX3/16CS BUNA70 #329 2.38"ACYL BRASS PISTONCUP WSHR GASKET=DUMPVAL 1/8"RED SILIC ROLLED WASH.252ID NYLTITE 25W ORING 5/16ID 1/16CSBUNA70#011 DUMP VLV CUP GSKT RED SILICONE BUMPER=DMPVAL BON'T RED SILC PISTON CUP=DUMPVALVE 2+3/8" | 1 2 2 1 1 9 2 1 1 2 |
KTWDVACR01 - BACK TO TOP
KIT PICTURE | COMPONENT | DESCRIPTION | QTY |
---|
| 60C132 60C108 02 02194 02 02185 02 02085 02 02105B 60C106 02 18931F 15G220 | ORING 2"IDX3/16CS BUNA70 #329 ORING 1/2IDX3/16CS BUNA70#310 PISTON CUP=DUMPVALVE 2+3/8" WASHER=PISTON CUP COMP LIMIT UP WASHER=2"OD=PISTON CUP 2.38"ACYL BRASS PISTONCUP WSHR ORING 5/16ID 1/16CSBUNA70#011 GASKET=DUMPVALVE-1/60+72WEHU NUTLOK THINHX 3/8-24 SS/NYL | 2 2 2 2 2 2 2 1 1 |
KTNCDVAC01 - BACK TO TOP
KIT PICTURE | COMPONENT | DESCRIPTION | QTY |
---|
|
60C106 02 16021D 02 16021H 02 16021E 06 40064 06 40065A 06 40069G 60C134 06 20537 03 01618 02 18651 03 01630 02 19302
| ORING 5/16ID 1/16CSBUNA70#011 DUMP VALVE BUMPER RETAINER BUMPER=DMPVAL BONT RED SILC WASHER 3/8IDX1.250D DUMPVAL DUMP VALVE GASKET RETAINER DUMP VLVE CUP GSKT RED SILC N/C DBL ACT DYE DMP VLV GSKT ORING 2.5ID3/16CS BUNA70 #333 2+7/8 AIR CYL SPRING DIVIDER PISTON CUP WASHER 3"AIRCYL WASHER=2 WAY BRAKE CYL 3"AIRCYL PSTNCUP CMPLMTWSH PISTON CUP 2+7/81D CYLINDER | 3 1 1 1 1 1 1 2 1 2 1 2 2 |
KIT PICTURE | COMPONENT | DESCRIPTION | QTY |
---|
| 02 02085 02 02101S 02 02105B 02 02185 02 16021C 02 16021D 02 16021E 03 01313S 06 50083 15G220 24G020N 27B260156S 60C106 60C110 60C132 06 20702C 02 02194 24G027N | UP WASHER=2"OD=PISTON CUP CYLINDER HEAD TAP.HOLE (SS) 2.38"ACYL BRASS PISTNCUP WSHR WASHER=PISTON CUP COMP LIMIT BUMPER=DUMP VALVE BONNET DUMP VALVE BUMPER RETAINER WASHER 3/8IDX1.250D DUMPVAL +STOP=AIRCYL W/2+11/16STR.SS 7639=FLOW NOT VLV GSKT NEOPR NUTLOK THINHX 3/8-24 SS/NYL ROLLED WASH.252ID NYLTITE 25W SPCRSLD.26ID.375OD.156L 316SS ORING 5/16ID 1/16CSBUNA70#011 ORING 1/2IDX3/32CS BUNA70 #112 ORING 2"IDX3/16CS BUNA70 #329 FLOW NOT VALVE GASKET PISTON CUP=DUMPVALVE 2+3/8" ROLLED WASH.312ID NYLTITE 31W | 2 1 1 2 1 1 1 1 2 2 3 6 2 2 2 2 2 4 |
KIT PICTURE | COMPONENT | DESCRIPTION | QTY |
---|
| 60C132 03 01313S 02 02085 02 02194 02 02105B 60C106 02 18651 02 02185 02 18931F 02 16021E 02 16021C 02 14446 02 14443 24G030N 24G020N 02 14166 | ORING 2"IDX3/16CS BUNA70 #329 +STOP=AIRCYL W/2+11/16STR.SS UP WASHER=2"OD=PISTON CUP PISTON CUP=DUMPVALVE 2+3/8" 2.38"ACYL BRASS PISTONCUP WSHR ORING 5/16ID 1/16CSBUNA70#011 WASHER=2 WAY BRAKE CYL WASHER=PISTON CUP COMP LIMIT GASKET=DUMPVALVE-1/60+72WEHU WASHER 3/8IDX1.250D DUMPVAL BUMPER=DUMP VALVE BONNET DISC-4"S/S DUMP VALVE GASKET-4"S/S DUMP VAL BONNET ROLLED WASH.379ID NYLTITE 37W ROLLED WASH.252ID NYLTITE 25W SEAT 4" DUMP VALVE BUNA-N | 2 1 1 1 1 1 1 1 1 1 1 1 1 8 4 1 |
KIT PICTURE | COMPONENT | DESCRIPTION | QTY |
| 02 02085 02 02101S 02 02105B 02 02185 02 16021C 02 16021D 02 16021E 03 01313S 06 20702A 06 20702C 06 20702E 15G220 24G020N 27B260156S 60C106 60C110 60C132 02 02194 | UP WASHER=2"OD=PISTON CUP CYLINDER HEAD TAP.HOLE (SS) 2.38"ACYL BRASS PISTONCUP WSHR WASHER=PISTON CUP COMP LIMIT BUMPER=DUMP VALVE BONNET DUMP VALVE BUMPER RETAINER WASHER 3/8IDX1.250D DUMPVAL +STOP=AIRCYL W/2+11/16STR.SS FLOW NOT VALVE GASKET RET. FLOW NOT VALVE GASKET FLOW NOT ACTUATOR CYL HEAD NUTLOK THINHX 3/8-24 SS/NYL ROLLED WASH.252ID NYLTITE 25W SPCRSLD.26ID.375OD.156L 316SS ORING 5/16ID 1/16CSBUNA70#011 ORING 1/2IDX3/32CS BUNA70 #112 ORING 2"IDX3/16CS BUNA70 #329 PISTON CUP=DUMPVALVE 2+3/8" | 2 1 1 2 1 1 1 1 2 2 1 2 3 6 2 1 2 2 |