Hale MG - Manual (Page 105)

Muscle Pumps
5-41
d. On valves with 5 inch NST discharge
fittings
1) Remove cap from discharge
connection
2) Reaching into discharge tube
apply a coating of grease to the
valve ball surface.
3) Making sure hands and fingers are
clear manually operate valve
through a couple of complete
cycles to spread grease.
4) On valves mounted in line or tank
suction valves do the following:
a) Gain access to the outlet side
of valve.
b) Remove piping from discharge
connection.
c) Remove thread cap from T-
bolt on V-clamp.
d) Remove jam nut from clamp
then loosen T-bolt nut.
e) Slide the clamp towards the
connectors to clear valve then
remove the connector and O-
ring.
f) Apply a coat of grease to the
valve ball.
g) Make sure fingers are clear of
valve and manually operate
valve through a few complete
cycles.
h) Apply a light coat of grease to
the O-ring groove and insert a
new O-ring into groove.
i) Install discharge connector and
secure in place by tightening
T-bolt nuts to 20 ft-lb.
j) Install jam nut and thread cap.
k) Reconnect discharge piping.
5) Test operate apparatus and check
for leaks.
6) Return apparatus to service.
3. 40BD Valve Seat Replacement
a. Place apparatus out of service in
accordance with departmental
procedures.
b. Open all drains and release pressure
from pump system.
c. Gain access to the outlet side of valve.
d. Remove piping from discharge
connection.
e. Remove thread cap from T-bolt on V-
clamp.
f. Remove jam nut from clamp then
loosen T-bolt nut.
g. Slide the clamp towards the
connectors to clear valve then remove
the connector and O-ring.
h. Carefully pry the seat housing out of
the valve using the ridge provided.
i. Push seat assembly out of housing.
j. Clean and inspect all parts and mating
surfaces.
k. Install new valve seat seal on seat
then push seat and seal assembly into
housing.
l. Apply a light coat of grease and
install new seal in groove of seal
housing.
m. With the seat oriented towards the
valve ba ll push seat and housing
assembly into discharge side of valve
body.