Hale 80FC - Manual (Page 76)

❑ Troubleshooting
76 Pump Ends
p/n: 029-0020-61-0
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, disman-
tle, 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 Set-
ting 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 3.5 “Relief Valve Procedures” on
page 50.
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 Con-
trol 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 proce-
dures. • Check instructions for setting the relief valve and reset.
• See Section 3 Operation, heading 3.5 “Relief Valve Procedures” on
page 50.
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 60.
• 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 Section “Appendix C1: Lube and Sealant Specifica-
tions” on page 139.
• Refer to separate valve manual for additional information.
Condition
Possible
Cause
Suggested Corrective Action
Figure 5-2: Troubleshooting Chart