WPG VL411LDC, Instructions Manual

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Rev 19.3/9-18 22 VL411LDC: #35162
V
ACUUM
P
UMP
M
AINTENANCE
− D
YNAFLO
DV1032102
WARNING: Before proceeding with any maintenance, disconnect power source.
If the vacuum pump takes too long to attain full vacuum, it may require maintenance. Replace
the diaphragm or the head assembly (see REPLACEMENT PARTS LIST), as necessary to obtain
acceptable pump performance.
CAUTION: Do not over-tighten the head screws, because this may damage the
threads in the pump body.
Replacing the Diaphragm
1) Remove the four head screws (1) and lock washers
(2), and remove the head assembly (3).
2) Remove the diaphragm retaining screw (4),
diaphragm (5), rubber O-ring (6) and flat washer
(7). Be sure to note the diaphragm orientation for
reassembly.
3) Replace the flat washer, rubber O-ring, diaphragm
and diaphragm retaining screw.
4) Reverse the steps above for reassembly, as shown.
Replacing the Head Assembly
15
1) Remove the hose fittings from the head assembly,
and carefully clean the threads. Be sure to note the
fitting locations for reassembly.
2) Remove the four head screws (1), lock washers (2)
and head assembly (3).
3) Replace the head assembly, and reverse the steps
above for reassembly, as shown.
4) Reinstall the hose fittings, using an appropriate
thread sealant.
15 CAUTION: Depending on the product, the head assembly (3) may be rotated to an orientation different from the one shown.
When removing the head assembly, always take note of its orientation and install it the same way during reassembly. Make sure
that the intake and exhaust ports remain in their original positions.
1 HEAD SCREW 5 DIAPHRAGM
2 LOCK WASHER 6 RUBBER O-RING
3 HEAD ASSEMBLY 7 FLAT WASHER
4 DIAPHRAGM RETAINING SCREW