Drain Valve - Graco 231–581 A Series Instructions-Parts List Manual

WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 9.
42a
42b
42d
42
Fig. 28
1. Turn the handle (45) to the closed position. Drive
out the pin (44). Remove the handle.
2. Remove the base (43).
3. Unscrew the drain valve (42). The gasket (42a)
and seat (42b) will stay in the valve.

Drain Valve

Apply thread sealant
Apply grease
to face of base
Torque into pump
manifold to 185 in–lb
42c
(21 N.m)
Handle shown
in closed position
43
44
45
02819
Repair
1. Unscrew the spring retainer from the valve body.
Remove the spring, washers and stem/ball. Clean
any debris from the ball or seat area.
2. If replacing the gasket (42a) or seat (42b), pry out
the gasket.
NOTE: Whenever the gasket (42a) is removed, re-
place it with a new one.
3. Coat the o-ring (42d) with grease. Press the stem
into the valve body. Install the spring, washers and
spring retainer into the valve body.
4. Place the seat (42b) in the valve body so the
lapped side is toward the ball. Apply a small
amount of grease to the new gasket (42a) and
install it in the valve body.
NOTE: The gasket will protrude from the end of the
valve until the valve is tightened into pump, which
correctly seats the gasket.
Replacement
1. Apply a small amount of thread sealant (42e) onto
the valve (42) threads. Tighten the valve into the
pump manifold to 185 in–lb (21 N.m).
2. Lightly grease the face of the base (43) and install
the base. Turn the stem so the pin hole is vertical.
3. Securely install the handle (45) and drive pin (44).