TM 5-3810-307-24-1-2
Installation.
a.
Ensure that sliding valve is in place and that the head assembly (1, Figure I-1) is
oriented properly as noted in step c in "Disassembly". Ensure guide pins are aligned
properly.
b.
Place mounting gasket (3) and head assembly (1) on the compressor crankcase.
c.
Insert four new head bolts (2) and tighten finger tight. The longer head bolt
(M8x105mm) should be installed in position "B", Figure I-2. Two cover bolts "E" and "F"
have been loosely installed at the factory to hold the head assembly together.
CAUTION
Use a torque wrench and the following torque-turn sequencing method
with Figure I-2 to tighten head bolts "A" thru "D" and head assembly bolts
"E" and "F". Failure to follow the correct sequence could result in a field
failure of the compressor.
d.
Torque head bolts "A", then "B", then "C", then "D" to between 10 and 12 ft-lbs (13.5 to
16.5 Nm).
e.
Torque head bolts "A", then "B", then "C", then "D" to between 17 and 20 ft-lbs (23 to 27
Nm).
Turn head bolt "A" an additional 180 degrees (+/- 10). Then turn head bolt "B" an
f.
additional 270 degrees (+/- 10). Finally, turn head bolt "C" then "D" an additional 180
degrees (+/- 10).
g.
Torque head assembly bolt "E" then bolt "F" to between 48 and 58 in.-lbs (5.4 to 6.6
Nm).
Turn head assembly bolt "E" then "F" an additional 90 (+15/-5).
h.
i.
Install air and coolant fittings retained from the removal procedure.
Change-1 I-7