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Low pressure
(Cont.)
Pump
runs
extremely
low
rough,
pressure very
Fouled or dirty inlet or discharge valves.
Worn inlet or discharge valves. Leaky
discharge hose.
Inlet restriction andlor air leaks. Damag-
ed cup or stuck inlet or discharge valve.
Worn inlet manifold seals.
Cylinder O-rings blown
manifold
next to discharge
0-Rings
at the
Leakage
at the cylinder
discharge manifold and
black, powdery
substance
in
the 'area
of
the 0-Rings.
Pressures
in
excess of rated PSI.
Warped manifold.
Loose cylinders. Cylinder motion caused
by improper shimming of the discharge
manifold.
Water leakage from Worn inlet manifold seals.
under the inlet
manifold.
Leaking sleeve 0-Ring.
Oil leak between Worn crankcase piston rod seals.
crankcase and
pump-
ing
section
Oil leaking
in
the area
Worn crankcase seal or improperly install.
of
crankcase
ed
oil
seal retainer packing.
Bad bearing.
end of the
crankcase tension to drive
belt.
Excessive
play
in
the
Worn main
ball
bearing from excessive
pulley
Water
in
crankcase May be caused by humid air condensing
into water inside the crankcase.
piston rod sleeve 0-Ring.
:
Leakage of manifold inlet seals and/or
Oil leakage from under May
be
caused by excessive oiling of the
side
of
crankcase wick lubricators.
Worn crankcase piston rod seals.
Dil leaking at'tha rear Damaged or improperly installed oil gauge
portion
of
the
xankcase
I
or crankcase rear cover 0-Ring, and drain
~lua
0-Ring.
3il leakage from drain
Loose
drain plug or worn drain plug
,lug
I
0-Ring.
-
.
.oud
knocking noise
in
Pulley
loose
on crankshaft.
lump
Broken or worn bearing.
hquent
or
premature Scored rods or sleeves.
ailure
of
the inlet
nanifold seals
I
Overpressure to inlet manifold.
lhort
cup
life
I
Damaged or worn chrome plating of the
cvlinders.
SOLUTION
Clean inlet and discharge valve
assemblies.
Replace worn valves, valve seats and/c
discharge hose.
foreign material, replace worn valves.
Replace worn cup or cups, clean out
Replace worn seals.
Check for plugged nozzle. closed valve!
or improperly adjusted by-pass valve.
Replace manifold.
~~
Exchange middle andoutboardcylinder,
Install new seals. If piston rod sleeves
are scored, replace sleeves and sleeve
0-Ring.
0-Rings,
Replace crankcase piston rod seals
damaged gasket and/or seals.
Remove oil seal retainer and replace
Replace bearing.
Replace ball bearing. Properly tension
belt. Check shaft shims.
Change'oil every month or
200
hours.
Replace seals, sleeve and 0-Rings.
Wipe free of oil.
Do
not oil lubricators
for
a
short period. If leakage continues,
replace the crankcase piston rod seals.
Replace oil gauge or cover 0-Ring, and
drain
plug 0-R,ing.
righten drain plug or replace 0-Ring.
:heck key and tighten set screw.
3eplace bearings.
3eplace rods and sleeves.
3educe inlet pressure per instructions.
3eplace the cylinders.