Case 580SR Service Manual page 825

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CYLINDER HEAD
Disassembly
Drain the refrigerant oil from the compressor into a
clean calibrated container. Measure and record the
quantity of oil obtained. This information is required
during installation of the new or overhauled unit.
Remove the six cylinder head bolts (10) and using a
hide mallet, gently tap the cylinder head (9) free.
The use of a gasket scraper may also be required to
free the cylinder head from the compressor body.
If the plate (7) and/or cylinder head are to be reused,
carefully remove the gasket (8) using a suitable
scraper.
Gently pry the plate (7) free from the cylinder block
and remove the gasket (6).
Inspect the plate (7) for damage.
Reassembly
Coat the top of the valve plate with clean refrigerant
oil and reassemble the cylinder head using the re-
verse of the disassembly procedure.
When installing the gaskets and valve plate ensure
they are correctly positioned over the locating pins in
the cylinder block.
Install the cylinder head bolts and tighten using the
sequence shown. Torque initially to 20 Nm.
When the overhaul is complete add to the compres-
sor a volume of oil equivalent to that drained prior to
disassembly, or as the reclaim measured fill.
SECTION 50 - CAB HEATING AND AIR CONDITIONING
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