Diaphragm Pump System; Disassembly - Generac Power Systems MAGNUM Owner's Manual

Maintenance
Lay the cover gasket and cover over the bolt holes
2.
and disc hinge.
Insert the lubricated bolts, noting that the bolts in
3.
the hinge area are longer than the others.
Cover bolts should be tightened to the following
4.
specification during assembly.
Table 7 - Bolt Torque Values
Bolt Size
3/8 in. 24 ft-lbs (33 Nm)
1/2 in. 59 ft-lbs (80 Nm)
5/8 in. 117 ft-lbs (159 Nm)
3/4 in. 205 ft-lbs (278 Nm)

Diaphragm Pump System

Disassembly

Loosen the clamp and disconnect the air hose from
1.
the priming valve.
Drain the oil from the seal oil reservoir via the line
2.
on the lower reservoir connection.
54
Torque
Disconnect the lower oil line at the reservoir, hold
3.
the disconnected end over a container and move
the line and container down to below the
connected end of the oil line. This will drain the
remaining oil from the lines and gland.
Disconnect the oil lines from the gland and unbolt
4.
the gland only if further pump disassembly is
planned.
Remove the bolts and nuts holding the two halves
5.
of the vacuum pump belt guard together. Remove
the two bolts and nuts holding the guard halves to
the vacuum pump support table. Remove the belt
guard halves.
Loosen (do not remove) the four bolts securing the
6.
vacuum pump to the support table. The belt is
tensioned by means of shims under the vacuum
pump. Loosen the support table bolts and insert a
large screwdriver or pry bar between the vacuum
pump and support table. Lift the vacuum pump
enough so that the shims can be removed.
Lower the vacuum pump to create sufficient slack
7.
to remove the belt. Once the belt is removed, the
vacuum pump can be completely unbolted and
removed if desired.
The vacuum pump support table and seal oil
8.
reservoir can now be unbolted and removed if
desired.
Owner's Manual for Dry-Prime Diesel Trash Pumps