Figure 5-13. Discharge Valve, Cross Sectional and Exploded View
(3) Cleaning and Inspection.
Refer to figure 5-13 and
reassemble the discharge valve. Torque nut as specified
(a) Clean all parts thoroughly.
(b) Inspect for damage and wear.
(c) Replace damaged or worn parts.
(a) Place the discharge valve gasket and
discharge valve in the cylinder head.
(a) Refer to figure 5-15 and reassemble suction
(b) Install discharge valve plug. Torque as
(b) Refer to figure 5-14 and reassemble the
(c) Install the cap gasket and discharge
e. Suction Valve Unloader. Suction valve unloader
Before installing the unloader apply a
should be removed, cleaned, and inspected after
light coat of silicone grease (MIL-L-
approximately six months of operation and the unloader
4343A or equivalent) to the outside of
repacked with grease.
the plunger and to the inside of the
hold down sleeve and seals.
(a) Disconnect the unloader tubing from the
suction valve cap (fig. 5-14) and remove the cap and O-
(a) Install the gasket (18, fig. 5-16) and suction
valve in the cylinder head.
(b) Remove the unloader assembly from the
(b) Place the unloader over the suction valve
cylinder head and lift out the suction valve and gasket.
(c) Install the suction valve cap and attach
(a) Refer to figure 5-14 and disassemble the
the unloader tubing.
f. Cylinder Head. Remove cylinder head only if
(b) Refer to figure 5-15 and disassemble the
loss of compressor pressure has been isolated to a
defective cylinder, or severe knocking points to in-
ternal problems within the cylinder.