Hale MG - Manual (Page 101)

Muscle Pumps
5-37
6) Rotate the input gear shaft to
check for proper operation.
7) Using a lifting device, remove the
gearbox from the holding fixture.
8) Install the gearbox; see paragraph
B.2 this section.
O. Primers
1. ESP Priming Pump
(Refer to figure 6-7)
The hale ESP primer is relatively maintenance
free. If after testing of the priming system the
primer fails to pull the required vacuum the primer
vanes may be worn and require replacement.
The following procedures should be used to
replace the primer vanes.
a. Place apparatus out of service in
accordance with departmental
procedures.
b. De-energize apparatus electrical system.
NOTE: Before beginning disassembly make note
of the position and locations of components to
ensure correct re-assembly.
c. Tag and disconnect wires from battery
connection, solenoid connection and
ground connection point.
d. Tag and disconnect hose from suction
connection.
e. Loosen nuts on studs or bolts that
hold primer assembly to mounting
pad. Remove primer to suitable work
area.
f. Remove the 3/8-16 UNC X2-1/2 inch
long cap screw and remove the 3/8-16
UNC nut from stud. Carefully
separate pump assembly from motor.
g. Using a non-marring mallet carefully
separate the pump head from the
pump body.
h. Remove the shaft and rotor assembly,
and the vanes from the pump body.
i. Remove the seal from the pump head
assembly.
j. Inspect all components for corrosion
and abnormal wear. Clean all
components. Obtain new components
as necessary.
k. Carefully press new seal into the
pump head assembly.
l. Insert rotor and shaft assembly into
pump body assembly. Slide new
vanes into the slots in the rotor. Rotate
the rotor and shaft making sure the
vanes move freely in the slots.
m. If necessary install new pins into the
pump head assembly. Align the pins
with the holes in the pump body
assembly and slide pump head over
rotor shaft. Once head is seated
against the pump body make sure the
rotor assembly turns freely in the
pump assembly.
n. Install motor on pump assembly and
secure in place using 3/8-16 UNC X2-
1/2 inch long cap screw and 3/8-16
UNC nut on the stud. Tighten the nut
and cap screw.
o. Place primer assembly on the
mounting point and tighten cap
screws or nuts.
p. Reconnect suction hose making sure
the connection is tight.
q. Reconnect ground wire, battery
connection and solenoid connection.
r. Energize apparatus electrical system.