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

DIAGNOSIS AND MAINTENANCE
PROBLEM PROBABLE CAUSE SOLUTION_____________
Pulsation *Faulty Pulsation Dampener Check pre-charge. If low, recharge or install
a new one.
Low Pressure *Belt slippage Tighten or replace. Use correct type/length.
*Air leak in inlet plumbing Disassemble, reseal and reassemble
*Pressure gauge inoperative or not Check with new gauge; replace worn
registering accurately or damaged gauge.
*Relief valve stuck, partially plugged Clean and adjust relief valve; check for
or improperly adjusted; valve seat worn worn or dirty valve seats. Repair with
Valve Kit.
*Inlet suction strainer clogged or improper size Clean. Use adequate size. Check frequently
*Worn Piston Assy. Abrasives in pumped Install proper filter. Suction at inlet manifold
fluid or severe cavitation. Inadequate water must be limited to lifting less than 20’ of water
supply or –8.5 PSI vacuum.
*Fouled or dirty inlet or discharge valves Clean inlet and discharge valve assemblies
*Worn inlet or discharge valves Replace worn valves, valve seats.
*Leaky discharge hose Replace discharge hose and check for air
tight connections.
* Worn nozzle Replace nozzle to proper size
Pump runs extremely *Restricted inlet or air entering the inlet Proper size inlet plumbing; check for air
rough, pressure very low plumbing tight seal.
*Damaged cup or stuck inlet or discharge Replace worn cups or valves; clean out
valve foreign material.
*Worn inlet seals allowing air into system Install new inlet manifold seals and possibly
or leaking fluid sleeves.
*Stressful inlet condition Pressurize inlet
Cylinder o-ring blown next *Pressure in excess of rated PSI or distorted Check for plugged nozzle, closed valves or
to discharge manifold manifold from freezing damage improperly adjusted by-pass valve and replace
defective manifold or o-ring. PROTECT FROM
FREEZING.
Leakage at the cylinder *Loose cylinders. Cylinder motion caused by Remove spacer shims on manifold studs. Do
o-rings at the discharge improper shimming of the discharge not remove too many shims or the ears of the
manifold and black manifold. manifold will be bowed when the manifold is
powdery substance in the retightened, causing looseness in the center of
area of the o-ring. the cylinder.
Water leakage from under *Worn inlet manifold seals. Leaking sleeve Install new o-rings as required. Replace scored
the inlet manifold o-ring. sleeves.
Oil leak between crankcase *Worn crankcase piston rod seals. Replace crankcase piston rod seals.
and pumping section *Excess oil from wicks Reduce quantity of oil per oiling.
Oil leaking in the area of *Worn crankshaft seal or improperly Remove oil seal retainer and replace damaged
crankshaft installed oil seal retaining package gasket and/or seals
*Bad bearing Replace bearing
Excessive play in the end *Worn main ball bearing from excessive Replace bearing. Properly tension belt. Use
of the crankshaft pulley tension on the drive belt correct type and length.
Water in crankcase *May be caused by humid air condensing Change oil every 3 months or 500 hour intervals
into water inside the crankcase using special CAT PUMP non detergent
HYDRAULIC OIL
*Leakage of manifold inlet seals and/or Replace seals, sleeves and o-rings
piston rod sleeve o-ring
Oil leaking from side of *Worn crankshaft seals Replace seals
crankcase
Oil leaking at the rear *Damaged or improperly installed oil Replace oil gauge, cover o-ring, or drain
portion of the crankcase gauge or worn crankcase rear cover plug o-ring as needed.