www.hartfordcompressors.com

Form No. 6136DRev. 2

LSC COMPRESSOR PARTS MANUALMODELS: LSC 163, LSC 204 and LSC 255

SERIAL NO. STAMPED ONFLANGE OF ROTOR HOUSING

OR

NAMEPLATE LOCATION(either side)

OLDER MODELS - towards outlet endNEWER MODELS - towards intlet end

IMPORTANT: READ THIS INFORMATION FIRST

This manual is to be used ONLY by parties specifically

AUTHORIZED BY HARTFORD COMPRESSORS INC.

to perform these maintenance procedures.

HARTFORD COMPRESSORS INC.

RESERVE THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS,

PART NUMBERS AND DESIGN WITHOUT NOTICE.

FOR LATEST INFORMATION CONTACT FACTORY.

HARTFORD COMPRESSORS INC., 2003

TABLE OF CONTENTS

DESCRIPTION PAGE

UNLOADER ASSEMBLY

LSC 163 Double Acting (CYL27), “C” and “D” Models Only . . . . . . . . . . . . . . . . . . . 2

LSC 163 and LSC 204 (Standard), “A” thru “D” Models . . . . . . . . . . . . . . . . . . . . . . . 3

LSC 255 (Standard), “A” thru “D” Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

LSC 163, 204, 255 Double Acting (CYL29T), “C” and “D” Models Only . . . . . . . . . . 5

EXPLODED PARTS DRAWING AND PARTS LIST

LSC 163A to Early Version 163D Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

LSC 163E and Later Version 163D Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

LSC 204A to Early Version 204D Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

LSC 204E & F and Later Version 204D Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

LSC 255A to Early Version 255D Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

LSC 255 and Later Version 255D Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

UNLOADER CONTROLLER INDICATORS

Magnetic Style - Slide Valve Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Cam Style - IDR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

E & F

HARTFORD COMPRESSORS INC.LSC - LARGE SCREW COMPRESSORS

HARTFORD COMPRESSORS INC.

179 South Street • West Hartford • Connecticut • 06110 • USAPhone: 860-249-8671 • Fax: 860-548-1705

Email: cserv@hartfordcompressors.com • Website: www.hartfordcompressors.com