Hale RSD - Manual (Page 64)

❑ Troubleshooting
64 Troubleshooting
Hale Series Pumps, Nov.-05, Rev-A
Relief Valve Does
Not Relieve Pres-
sure When Relief
Valves are Closed
- continued. Relief valve
inoperative. • Possibly in need of lubrication. Remove valve from pump, dis-
mantle, clean and lubricate.
• Refer to relief valve manual and follow maintenance instructions
for disassembly, cleaning and lubrication.
Relief Valve Does
Not Recover and
Return to Origi-
nal Pressure
Setting After
Opening Valves. Dirt in system causing
sticky or slow reaction. • Check and repeat proper procedures for setting the relief valve
system.
• See Section 3 Operation, heading 3.7 “Relief Valve Procedures”
on page 40.
Relief valve
inoperative. • Blocked bleed orifice - clean the bleed orifice with a small wire or
straightened paper clip.
• Refer to relief valve manual and follow maintenance instructions
for disassembly, cleaning and lubrication.
Relief Valve
Opens When
Control Valves
are Locked Out. Drain hole in housing,
piston or sensing
valve is blocked. • Clean the valve drain hole with a small wire or straightened paper
clip.
• Refer to relief / sensing valve manual and follow maintenance
instructions for disassembly, cleaning and lubrication.
Unable to Obtain
Proper Setting
on Relief Valves. Using the wrong pro-
cedures. • Check instructions for setting the relief valve and reset.
• See Section 3 Operation, heading 3.7 “Relief Valve Procedures”
on page 40.
Blocked strainer. • Check and clean the strainer in the supply line from the pump dis-
charge to the control valve. Check truck manual for location.
• Also see Section 4 Preventive Maintenance, heading “Intake
Strainers” on page 48.
• Check and clean tubing lines related to the relief and control
valves.
Dirty control valve. • Remove the control valve and clean.
“Hunting” condition. • Insufficient water supply from the pump to the control valve.
• Check the strainer and relief valve system for flow restrictions.
• Remove and clean the control valve.
Discharge Valves
Are Difficult to
Operate.
Chart continued on
next page.
Lack of lubrication. • Recommended weekly lubrication of discharge and suction valve.
• Use a good grade, petroleum based, silicone grease.
• For Hale Products, SVS Valves, etc., use Never-Seez ® White
Food Grade with PTFE.
• Also see “Appendix C1: Lube and Sealant Specifications” on
page 115.
• Refer to separate valve manual for additional information.
Condition
Possible
Cause
Suggested Corrective Action
Figure 5-2: Troubleshooting Chart