GMC T Series 1994 Repair Manual page 64

SD-7H15 AIR CONDITIONING
NOTICE: When fasteners are removed, always reinstall them at the same location from which they were
removed. If a fastener needs to be replaced, use the correct part number fastener for that application. If
the correct part number fastener is not available, a fastener of equal size and strength (or stronger) may
be used. Fasteners that are not reused, and those requiring thread locking compound will be called out.
The correct torque value m ust be used when installing fasteners that require it. If the above conditions
are not followed, parts or system damage could result
SUBJECT
General Description.....................................................................................................................................................1D4-1
Inspection...................................................................................................................................................................... 1D4-1
Leak C h e c k ................................................................................................................................................................1D4-1
Disassembly of the Clutch A ssem b ly...................................................................................................................1D4-2
Assembly of the Clutch A ssem b ly........................................................................................................................ 1D4-3
S pecifications................................................................................................................................................................... 1D4-4
General Specifications............................................................................................................................................... 1D4-4
Fastener Tightening Specifications............................................ ........................................................................... 1D4-4
Special T o o ls .................................................................................................................................................................... 1D4-5
The Sanden SD-7H15 is a belt-driven seven cylinder
compressor with an integral clutch. The clutch assembly
is the only part of this compressor that is serviceable.
The compressor can be identified by a label attached
to the compressor body giving the part number, model,
SECTION 1D4
COMPRESSOR
CONTENTS
GENERAL DESCRIPTION
and manufacturer's name. The date code is stamped on
the front left mounting ear viewed as facing the clutch
(figure 1). It will be either a two-digit number or a num-
ber-letter combination. The first number gives the year
of manufacture. This is followed by one of the numbers
1 through 9, indicating the months January through
September. October, November, and December are
indicated by an X, Y, or Z.
Although certain service operations can be performed
without removing the compressor from the vehicle, the
operations described here are based on bench repair
with the compressor removed from the vehicle. They
have been prepared in order of accessibility to the com­
ponents (figure 2).
INSPECTION
LEAK CHECK
Before disassembling any compressor components,
check for leaks in the following areas:
• Check around the shaft seal, front housing seal,
valve plate, and oil plug. If a leak is found, replace
the compressor.
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