Hale MBP Booster - Manual (Page 60)

59 Silencer Series Booster Pump, p/n: 029-0020-83-0
Troubleshooting
❑
RELLEF VALVE
DOES NOT
RELIEVE PRES-
SURE WHEN
VALVES ARE
CLOSED Incorrect setting of
control (PDM) Valve • Check and repeat proper procedures for setting relief valve
system.
• See Section 3 Operation, heading “Relief Valve Procedures” on
page 35.
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
ORIGINAL
PRESSURE SET-
TING AFTER
OPENING
VALVES Dirt in system caus-
ing sticky or slow
reaction • Check and repeat proper procedures for setting the relief valve
system.
• See Section 3 Operation, heading “Relief Valve Procedures” on
page 35.
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
VALVE IS
LOCKED OUT Drain hole in hous-
ing, piston or sens-
ing 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
OBTAINE
PROPER SET-
TING ON
RELIEF VALVE
Chart continued on
next page.
Using the wrong
procedures • Check instructions for setting the relief valve and reset.
• See Section 3 Operation, heading “Relief Valve Procedures” on
page 35.
Blocked strainer • Check and clean the strainer in the supply line from the pump dis-
charge to the control valve. Check truck manual for the exact
location.
• 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.
Condition
Possible
Cause
Suggested Corrective Action
Figure 5-2: Troubleshooting Charts