LANDA VHP • 8.913-949.0 • Rev. 5/13
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
14
TroubleshooTIng
problem
possIble Cause
soluTIon
pulsaTIon
Faulty pulsation damper
Check precharge. If low, recharge or install
new one.
loW
pressure
Worn nozzle
Replace with nozzle of proper size.
Belt slippage
Tighten or replace with correct belt.
Air leak in inlet plumbing
Disassemble, reseal and reassemble.
Relief valve stuck, partially plugged or
improperly adjusted. Valve seat worn
Clean and adjust relief valve; check for
worn or dirty valve seats. Kit available.
Inlet suction strainer clogged or
improperly sized
Clean. Use adequate size. Check more
frequently.
Worn packing.
Abrasives in pumped in cavitation.
Inadequate water
Install proper filter. Suction at inlet mani-
fold must be limited to lifting less than 20
feet of water or 8.5 psi vacuum.
Fouled or dirty inlet or discharge valves Clean inlet and discharge valve
assemblies.
Worn inlet, discharge valve blocked
or dirty
Replace worn valves, valve seats and/or
discharge hose.
Leaky discharge hose
Replace.
pump runs
exTremely rough,
pressure
very loW
Restricted inlet or air entering the inlet
plumbing
Proper size inlet plumbing; check for air
tight seal.
Inlet restrictions and/or air leaks. Stuck
inlet or discharge valve
Replace worn cup or cups. Clean out
foreign material. Replace worn valves.
WaTer leakage
from unDer
manIfolD.
Worn packing
Install new packing.
oIl leakIng In area
of CrankshafT
Worn crankshaft seal or improperly
installed oil seal O-ring
Remove oil seal retainer and replace
damaged O-ring and/or seals.
Bad bearing
Replace bearing.
exCessIve
play In enD of
CrankshafT
pulley
Worn main bearing from excessive
tension on drive belt
Replace crankcase bearing and/or
tension drive belt.
WaTer In
CrankCase
Humid air condensing into water inside
crankcase
Change oil intervals. Use any high grade
automotive 30 weight non-detergent oil.
Worn packing and/or piston rod sleeve;
O-rings on plunger retainer worn
Replace packing. Replace O-rings.
oIl leakIng from
unDersIDe of
CrankCase
Worn crankcase piston rod seals
Replace seals.
oIl leakIng aT
rear porTIon
of CrankCase
Worn crankcase piston rod seals
Replace seals.
louD knoCkIng
Pulley loose on crankshaft
Check key and tighten set screw.
noIse In pump
Broken or worn bearing
Replace bearing.
