SANDPIPER SSA2-A - Manual (Page 7)

ssa2dl4sm-REV0614 Model SSA2-A Page 5
TROUBLESHOOTING
PROBLEM: Pump cycles but will not pump. (Note: higher suction lifts require faster
cycling speed for priming.)
POSSIBLE CAUSES:
A. Air leak in suction line.
B. Excessive suction lift.
C. Check valve not seating properly.
D. Leakage at joint of suction manifold or elbow flange.
E. Suction line or strainer plugged.
F. Diaphragm ruptured.
PROBLEM: Pump will not cycle. (Note: Always disconnect air supply to relieve air
pressure before disassembling any portion of pump.)
POSSIBLE CAUSES:
A. Discharge hose or line plugged, or discharge head requirement greater than air
supply pressure. (Disconnect discharge line to check.)
B. Spool in air distribution valve not shifting. (Remove end cap and check spool —
must slide freely.)
C. Diaphragm ruptured. (Air will escape out discharge line in this case.)
D. Blockage in diaphragm chamber preventing movement. (Shut off air supply and
reopen after pressure is relieved.)
PROBLEM: Uneven discharge flow. (Indicates one chamber not
operating properly.)
POSSIBLE CAUSES:
A. Check valve not sealing properly in one chamber.
B. Diaphragm failure in one chamber.
C. Air leak at suction manifold joint or elbow flange one side.
WARRANTY:
This unit is guaranteed for a period of five years against defective material and
workmanship.
The following, currently available complete 'Wet End Kits' have been modified to include
the parts required to change diaphragms out to the newer part number.
476-044-366 Wet End Kit SSA2-A Food Grade Nitrile
476-044-368 Wet End Kit SSA2-A Food Grade EPDM
These kits now include the -030- style diaphragm (2 each) and the 612-197-111 outer
diaphragm plate (2 each). These kits will apply to SSA2-A units with serial numbers
up to 586310.
For SSA2-A units with serial numbers 586311 and above, use the following partial
Wet End Kits:
476-168-366 Wet End Kit SSA2-A Food Grade Nitrile
476-168-368 Wet End Kit SSA2-A Food Grade EPDM
Note: When either of these kits are ordered, they do not include the 612-197-111
outer diaphragm plates.
476-167-366 Include 619-197-111/612-198-150/286-030-366 or 368
476-167-368 (used to change out Diaphragm Plate System)
476-179-366 Include 619-197-113/612-198-150/286-030-366 or 368
476-179-368 (used to change out Diaphragm Plate System)