WWW.THOROUGHCLEAN.COM.AU
3. TROUBLE SHOOTING GUIDE
PROBLEM
POSSIBLE CAUSE
REMEDY
COMMENT
# MACHINE WILL NOT START
1. Pump Oil Level too low
2. Fuel empty
3. Choke not on
4. Main switch not ON
5. Fuel is OFF
1. Top up with SAE30 /15W40
2. Top up using clean petrol
3. Engage Choke
4. Turn on
5. Fuel Lever to Open
# MACHINE RUNNING OKAY,
BUT NOT REACHING
SPECIFIED PRESSURE
#Sucking air
Check Suction for Air Leaks
#Valves Sticking
Remove – Clean – Replace
Check Water Quality
#Seat in Unloader Valve Worn/
By-Passing Water
Remove – Fit BPV Service Kit Or
Exchange Valve
Probably Indicate
- Pump Seal/Piston Valve
#HP Jet Wrong Size – Worn Out Check – Replace
- Service Required?
#Worn Piston H.P. Seals
Check – Replace
Check Pistons for Cracks
# Insufficient Water Supply
Check Available Water Supply &
Filters in Suction Line
# FLUCTUATING PRESSURE
#Valves Worn/Sticking
Remove – Clean – Replace
#Block ages/Debris in By-Pas s
Valve
Remove – Clean – Replace
Therefore Check Suction Filters
#Pump Sucking Air
Seal Suction
#Worn Piston HP Seals
Remove – Clean – Replace
Servic e Required
# PSI LOW AFTER PERIOD OF
USE
#Fair Wear / Tear?
Check – Replace HP Jet
Check Recent Activity/Usage
#Suction/Delivery HP Outlet
Valves Worn
Check – Replace
Therefore Check suction Filters
#Unloader Valve Worn
Replace as required
#Piston Seals Worn
Replace as required
Check Big Ends for Piston Slap
#Piston Crac ked
Replace as required
Check Big Ends for Piston Slap
#”O” Rings Failed/Leaking
Replace as required
#”Big End” Worn
Replace as required
#Drive Belts Loose
Check / Tighten
# PUMP “NOISY”
#Air in Suction / Pump Cavitating Identify Air Ingress/Seal
#Broken or Weak Suction Valve
Spring
Check – Replace – As Set
#Valves Clogged/Sticking
Check – Replace – As Set
#Worn Main Crankshaft Bearings
#Probably Uneconomical to
Repair
#Inlet Water Temp over 75 deg
Cels ius
Reduce inlet Water Temp
Enclosed By-Pass for excessively
long periods?
