Product Manual A

Maintenance
31609 A MTP4000-6000DZV/DZD Operating Manual 63
4. Cover bolts should be tightened to the following specification during assembly.
DIAPHRAGM PUMP SYSTEM
Disassembly
1. Loosen the clamp and disconnect the air hose from the priming valve.
2. Drain the oil from the seal oil reservoir via the line on the lower reservoir connection.
3. Disconnect the lower oil line at the reservoir, hold 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.
4. Disconnect the oil lines from the gland and unbolt the gland only if further pump disassembly is planned.
5. Remove the bolts and nuts holding the two halves 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.
6. Loosen (do not remove) the four bolts securing the 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.
7. Lower the vacuum pump to create sufficient slack to remove the belt. Once the belt is removed, the vacuum
pump can be completely unbolted and removed if desired.
Table 5 - Bolt Torque Values
Bolt Size Torque
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)