Disassembly and Reassembly
33
3. Four Cylinder Only—Install the gaskets,
cylinder heads, and discharge manifold with
all bolts assembled loosely. Tighten the
discharge manifold bolts in a criss-cross
pattern to 70% of final torque. See “Torque
Values” on page 24. Tighten the cylinder head
bolts in a criss-cross pattern to 70% of
recommended torque. See “Torque Values” on
page 24. Use a hand torque wrench to tighten
the cylinder head bolts to final torque. Use a
hand torque wrench to tighten the discharge
manifold bolts to final torque.
Figure 17: Cylinder Head Torque Sequence
Discharge Valve Plates
Removal
1. Remove the cylinder head. See “Cylinder
2. After removing the head and gasket, remove
the discharge valve plates. It may be necessary
to turn the valve plate slightly clockwise to
loosen it.
Figure 18: Valve Plate Removal
3. When the valve plate is free, turn it by hand
and lift it straight out of the compressor body.
The discharge valve assembly can skew and
wedge itself into the compressor body during
removal. If this happens, gently tap the
assembly back into the cylinder and start over.
Figure 19: Valve Plate Removal or Installation
4. Remove and discard the O-rings.
Figure 20: O-ring Location
AGA521
AGA540
AGA541
AGA542
