Troubleshooting Guide - Maxus MX5223 Manual Del Usuario

Operating Instructions and Parts Manual

Troubleshooting Guide

SYMPTOM
Low pressure and /or pump
runs rough
Water leakage from under
pump manifold
Water in pump crankcase
(milky oil)
Frequent or premature failure
of the pump water seals
Strong surging at the inlet and
low pressure
Oil leakage between the
engine and the pump
Fluctuating pressure
Pressure drops after period of
normal use
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CAUSE
1. Worn or wrong size tip
2. Inlet filter on pump clogged
3. Worn water seals, abrasives in water,
or natural wear
4. Fouled or dirty inlet or discharge
valves
5. Restricted inlet
6. Worn inlet or discharge valves
7. Leaking high pressure hose
8. Pump drawing in air
9. Unloader valve seat faulty or worn
Worn water seals
1. Humid air condensing inside
crankcase
2. Oil seals leaking
1. Scored damaged or worn plungers
2. Abrasive material in the fluid
3. Inlet water temperature too high
4. Overpressurizing pump
5. Excessive pressure due to partially
plugged or damaged tip
6. Pump running too long without
spraying
7. Pump running dry
Foreign particles in the inlet or discharge
valve or worn inlet and/or discharge
valves
Worn oil seals and/or o-ring
1. Valve worn, dirty or stuck
2. Pump drawing in air
3. Tip clogged
1. Worn pump water seals
2. Nozzle worn
3. Valve worn, dirty or stuck
4. Unloader valve seat worn or dirty
5. Nozzle in low psi position
SOLUTION
1. Replace with tip of proper size
2. Clean. Check more frequently
3. Check filter. Replace water seals. See service center
4. Clean inlet and discharge valve assemblies. Check
filter
5. Check garden hose, may be collapsed or kinked.
Check inlet water flow
6. Replace worn valves
7. Replace high pressure hose
8. Ensure hoses and fittings are tight
9. Check and replace
Install new water seals. See CAT service center
1. Change oil as specified in maintenance schedule
2. Install new oil seals. See CAT service center
1. Install new plungers. See CAT service center
2. Install proper filtration on pump inlet plumbing
3. Check water temperature; may not exceed 100° F.
4. Do not modify any factory set adjustments.
5. Clean or replace tip.
6. Never run pump more than 1 minute without
spraying
7. Do not run pump without water
Clean or replace valves. See CAT service center
Replace oil seals and/or o-ring. See service center
1. Check and replace
2. Ensure hoses and fittings are tight. Purge air from
garden hose
3. Check or replace
1. Check and replace
2. Check and replace
3. Check, clean or replace
4. Check, clean or replace
5. Pull back nozzle to high pressure position
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