7/05 Model HDB2-A Page 5 Rev B
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.)
E. Plugged or dirty exhaust muffler.
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.
D. Plugged or dirty muffler.
For additional information, see the Warren Rupp Troubleshooting Guide.
WARRANTY:
This unit is guaranteed for a period of five years against defective material and
workmanship.
RECOMMENDED WARREN RUPP ACCESSORIES
TO MAXIMIZE PUMP PERFORMANCE:
• Tranquilizer
®
Surge Suppressor: For nearly pulse-free flow.
• Warren Rupp Filter/Regulator: For modular installation and service
convenience.
• Warren Rupp Speed Control: For manual or programmable process
control. Manual adjustment or 4-20mA reception.
For more detailed information on these accessories,
contact your local Warren Rupp Factory-Authorized Distributor,
or Warren Rupp corporate headquarters.
Available Service Kits
Part No. Description
476-100-000 Air End Kit
Seals, O Rings, Gaskets, Sleeve and Spool Set, Pilot Valve
Assembly
476-043-354 Santoprene Diaphragms and Check Balls, Fibre Gaskets,
Nitrite O Rings
476-043-360 Buna Diaphragms, Check Balls and O Rings, Fibre Gaskets
476-043-364 EPDM Diaphragms and Check Balls, Fibre Gaskets, Nitrite O
Rings
476-043-365 Neopreme Diaphragms and Check Balls, Fibre Gaskets, Nitrite
O Rings
476-043-633 Viton Diaphragms, PTFE Check Balls, Gaskets and O Rings
476-043-635 PTFE Overlay Diaphragms, Check Balls, Gaskets and O Rings,
Neoprene Backup Diaphragm
476-043-636 Food Grade Nitrite Diaphragms, PTFE Check Balls, Gaskets
and O Rings
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