Sun Pumps SPB 10-16C-1.0 - Manual (Page 2)

An Unloader or Relief Valve must be installed to prevent over pressurizing the
pump in the event the discharge or downstream plumbing becomes plugged or is turned
off. Severe damage to the pump will result if this condition occurs without a relief valve
in the line. CAUTION: Failure to install such a safety valve will void the warranty
on the pump. Discharge regulating devices should be at minimum pressure setting
at start-up. On systems over 2000-PSI SECONDARY PROTECTION is recommended
by installing a pop-off valve, safety valve or rupture disc. START SYSTEM WITH ALL
VALVES OPEN OR IN THE LOW PRESSURE SETTING.
Use PTFE liquid (sparingly) or tape to connect accessories or plumbing. Exercise
caution not to wrap tape beyond the last thread to avoid tape from becoming lodged in the
pump or accessories. This condition will cause a malfunction of the pump or system.
STORING: For extended storing or between use in cold climates, drain all pumped
fluids from the pump and flush with antifreeze solution to prevent freezing and
damage to the pump. DO NOT RUN PUMP WITH FROZEN FLUID.
SERVICING THE VALVE ASSEMBLIES
DISASSEMBLY
1. Remove the fasteners securing the discharge manifold to the crankcase of the pump.
2. Support the discharge manifold and tap from the backside with soft mallet. Gradually
work free from cylinders.
3. Valve assemblies will remain in the manifold. Pump models with the o-ring groove
on the outside of the valve seat require the assistance of a Valve Seat Removal
Tool to remove the valve seat. The valve, spring and retainer will then fall out
when the manifold is inverted.
Pump models without the o-ring groove on the outside of the valve seat permit the seat,
valve,
spring and retainer all to fall out when manifold is inverted.
REASSEMBLY
1. Examine Retainer for wear and replace as needed. Place Retainer in manifold
chamber with nylon tab down.
2. Examine springs for fatigue and replace as needed. Insert spring into center of