Table 4-1. Troubleshooting - continued
PROBLEM
POSSIBLE CAUSE
REMEDY
Water leakage from
Worn inlet manifold
Install seals. If piston rod sleeves are
under the inlet mani-
seals. Leaking sleeve
scored, replace sleeves and sleeve
fold
O-ring.
O-rings.
Oil leak between
1. Worn crankcase
Replace crankcase piston rod seals.
crankcase and
piston rod seals.
pumping section
2. Excess oil from wicks.
Reduce quantity of oil per oiling.
Oil leaking in the
Worn crankshaft seal
Remove oil seal retainer and replace
area of crank-
or improperly installed
damaged gasket and/or seals.
shaft
oil seal retainer packing.
Bad bearing.
Replace bearing.
Excessive play in
Worn main ball bearing
Replace ball bearing. Properly tension
the end of the
from excessive tension
belt.
crankshaft pulley
on drive belt.
Water in crankcase
1. May be caused by
Change oil at 2 month or 200 hour inter-
humid air condensing
vals.
into water inside the
crankcase.
2. Leakage of manifold
Replace seals, sleeve and O-rings.
inlet seals and/or
piston rod sleeve 0-
ring.
Oil leaking from
Worn crankcase piston
Replace seals.
underside of
rod seals.
crankcase
Oil leaking at the
Damaged or improperly
Replace oil gauge or cover O-ring, and
rear portion of the
installed oil gauge or
drain plug O-ring.
crankcase
crankcase rear cover
O-ring, and drain plug
O-ring.
Oil leakage from
Loose drain plug or worn
Tighten drain plug or replace O-ring.
drain plug
drain plug O-ring.
Loud knocking
1. Pulley loose on crank-
Check key and tighten set screw.
noise in pump.
shaft.
2. Broken or worn
Replace bearings.
bearing.
4-8
