Superior PEC-215E User manual
Table Of Contents
Important Safety Information 3
Glossary Of Terms 5
Installation Instructions: Wall Mounted 6
Installation Instructions: Cabinet 7
Operating Instructions 8
Chemical Application 9
Maintenance 10
Quick Diagnostics and Solution Guide 11
Component Identification: Wall Mounted 12
Component Identification: Cabinet 13
Pump Repair Kits 14
Replacement Parts 15
Service Manual 16
Warranty 25
Warranty Repairs 26
3
Important Safety Information
The safe operation of this pressure washing system is the first priority of Superior Cleaning Equipment.
This will only be achieved by following the operation and maintenance instructions as explained in this manual and all other
enclosed manuals.
This manual contains essential information regarding the safety hazards, operations, and maintenance associated with this
machine. The manual should always remain with the machine, including if it is resold.
WARNING: To reduce the risk of
injury, read operating instructions
carefully before using.
WARNING: Use protective eye
wear and clothing when operat-
ing equipment in order to avoid
personal injuries.
WARNING: This machine
exceeds 85dB. Appropriate ear
protection must be worn.
WARNING: Trigger gun kicks
back. Hold with both hands.
WARNING: Keep water spray
away from electrical wiring.
WARNING: Risk of injection or
severe to persons. Keep clear of
nozzle spray.
WARNING: Protect from freezing.
WARNING: Risk of injury from
falls when using ladder.
4
Important Safety Information
1. Read the instructions in this manual carefully before attempting to assemble, install, operate or service this pressure
washer. Failure to comply with the instructions could result in personal injury and/or property damage.
2. Hold firmly to the gun and wand during start up and operation of the machine. Do not attempt to make adjustments while
the trigger gun is in operation.
3. Make sure all quick coupler fittings are properly secured before operating pressure washer.
4. All electrically powered equipment must be grounded at all times to prevent fatal electric shots. Do not spray water on or
near electrical components. Do not touch electrical components while standing in water or when hands are wet. Always
make sure machine is disconnected from power source before servicing.
5. High pressure spray can cause serious injuries. Never point pressurized spray at any person or animal. Handle the spray
assembly with care.
6. Do not overreach or stand on anything unstable. Keep a good balance and make sure to keep a steady footing at all times.
7. It is important to keep your machine from freezing in order to keep it in its best working condition. Failure to protect your
machine from freezing may cause damage to the machine and personal injuries may occur as a result.
8. WARNING: Keep hands clear from belt guard and other moving parts. DO NOT OPERATE MACHINE WITH BELT GUARD
REMOVED.
9. Protect high pressure hoses from sharp objects and vehicles. Inspect condition of hoses prior to use, or serious injury
could occur.
10. Do not pass acids or other caustic or abrasive fluids through the pump.
11. Do not attempt to operate this machine if fatigued or under the influence of alcohol, prescription medications, or drugs.
12. Some of the maintenance procedures involved in this machine require a certified technician (these steps are indicated
throughout this manual). Do not attempt to perform these repairs if you are not qualified.
If you need further explanation of any of the information in this manual, suspend any activity involving the equipment and call
our toll free number for assistance, (800) 635-4903.
Detectable amount of chemicals known to the
State of California to cause cancer, birth de-
fects or other reproductive harm may be found
in pressure washing equipment, accessories
and exhaust.
California Health and Safety Code 25249.5
For More Information Visit
www.p65warnings.ca.gov D01-00612
5
Glossary of Terms
Auto Start/Stop – Unit will automatically start when the trigger is pulled, and it will stop the motor on time delay after the
trigger has been released in order to prevent the pump from bypassing and overheating.
PSI – Pounds per square inch. Pressure washers are designed and rated to operate at a specific PSI. Operating at pressures
exceeding the maximum rating could result in damage to the unit and/or SEVERE PERSONAL INJURY.
GPM – Gallons per minute. The orifice on the pressure wand assembly has been selected to deliver up to the maximum GPM
for your machine.
Pressure Wand Assembly – This refers to the gun, wand, and nozzle.
Pump – The pump moves the water through the system and delivers it to the pressure wand assembly.
Unloader Valve – Is a valve located at the head of the pump for unloading water back into the bypass when the trigger gun
is shut o. It also reduces the load on pump when gun is o.
Pump Oil – The oil used within the pump to lubricate its operation. It is Important to use only SAE 30 W Non Detergent (for
GP Pumps).
Back Flow Preventer – Device to prevent flow backwards into potable water supply.
Maximum Working Pressure - Each machine is equipped with a safety pressure relief valve which prevents over pressur-
ization of the high pressure system. It is an important safety device and must not be tampered with in any way.
Pressure Switch - A pressure switch is used to control the motor for the auto stop/start feature.
Flow Switch – A flow switch is installed on the outlet of the high pressure pump and will shut o the pump and motor in the
absence of water flow as well as turning it back on when flow is detected (by squeezing the trigger).
6
Installation Instructions: Wall Mounted
1. Mount to wall using appropriate hardware (not included). Secure to wall using the 4 holes located on the unit wall mount
bracket.
2. Screw o the oil plug located on top of the pump. Insert pump oil dipstick into the pump (located in plastic bag with man-
ual)
3. Mount Cox hose reel to wall using appropriate hardware (not included).
4. Connect 3/8” jumper hose coupler to the chemical injector 3/8” M nipple. The opposite hose end has been pre-connect-
ed to the hose reel.
5. Connect water supply to system water inlet connection.
6. Ensure the control knob is in the OFF position. The control knob is located on the right side of the control box.
7. Connect electric power cord into an approved receptacle (110 volts, 15 amps). NOTE: Do not use an extension cord.
8. Refer to OPERATING INSTRUCTIONS to begin use.
7
Installation Instructions: Cabinet
1. Connect water supply hose to inlet water hose connection (located on right side of the cabinet). Water supply hose not
included.
2. Screw o the oil plug located on top of the pump. Insert pump oil dipstick into the pump (located in plastic bag with man-
ual)
3. Ensure the control knob is in the OFF position. The control knob is located on the left side of the control box.
4. Connect electric power cord into an approved receptacle (110 volts, 15 amps). NOTE: Do not use an extension cord.
5. Refer to OPERATING INSTRUCTIONS to begin use.
8
Operating Instructions
1. Perform pre-start maintenance inspection on all applicable systems prior to operating the machine. This is essential
for the safe, eective and eicient operation. You will get optimum performance from your system ONLY if these instruc-
tions and inspections are followed. Any indication that the pressure washing system was not operated and maintained
according to these instructions may cancel the manufacturers’ warranty.
Controls – Make sure all controls turned to the o position.
Pump oil level - Level the pressure washer. Be sure oil level in the pump is correct on dip stick. If the level is low, add the
correct oil to the proper level. USE ONLY SAE 30 W NON-DETERGENT OIL. DO NOT OVER FILL.
Visually inspect all electrical components to assure they are in good condition, showing no signs of exposure, breakage
or splicing.
Visually inspect all hoses, nozzles and guns to assure they are in good condition. If replacements are necessary they
must be rated to withstand the machines operating pressure and temperatures.
2. Attach high-pressure hose to water outlet quick connector. Attach the other end of high pressure hose (with quick
coupler) to spray gun. Ensure that quick disconnect connections are tightly locked together. Apply a sharp pull on hose to
confirm they are secured.
Attach wand nozzle specific to task requirements (i.e. chemical or pressure wash)
Quick Coupling Operation – Pull back sleeve end and insert male end into nozzle quick coupler, release sleeve and con-
firm connection by pulling on nozzle.
3. Attach water source to water inlet located on pump. The water source must be attached with a good quality standard
garden type hose (1/2” minimum is required). Connect male fitting into the female pump inlet fitting. Make sure that the
inlet screen/filter is intact and fitted correctly.
Turn on water source. WATER MUST BE IN SUFFICIENT SUPPLY, AND PRESSURE MUST BE BETWEEN 20 – 60 PSI
TO ENSURE PROPER AND SAFE OPERATION. Specific attention should be given if using a well water supply.
Ensure water is flowing from end nozzle with trigger gun pulled. Deplete system of all air.
4. Start electric motor. Turn PUMP switch to “ON’”. PUMP switch is located on the frame beside the motor, or for auto
stop/start systems, PUMP switch is located on the electrical box.
5. Pressure adjustment - The pressure regulator (unloader) is located on the pump (see diagram). It controls pressure
being generated by the pressure washer. This regulator may be adjusted to the desired pressure by turning the adjust-
ment knob. Turning the adjustment knob clockwise will increase the pressure. NEVER OPERATE SYSTEM AT A HIGHER
PSI THAN THE MAXIMUM RATING. This machine has been adjusted to operate at a specific maximum pressure as per
the machine specifications. Pressure may be reduced for lighter use by turning the Pressure Regulator/Unloader counter
clockwise. If continuing to turn the unloader clockwise does not increase the pressure, then this implies the maximum has
been reached for the system. Any further turning of the unloader will cause the pressure to spike when the wand trigger is
released, resulting in possible damage to the machine. To avoid this eect, loosen the unloader (counter-clockwise) until
the pressure just starts to drop (see pump head pressure gauge) and until it no longer exceeds the maximum pressure
rating for the machine.
6. You are now ready to start the cleaning operation - Pull trigger on the pressure wand assembly to start cleaning.
To stop the pressurized water, release the trigger. DO NOT LEAVE UNIT RUNNING WHEN NOT IN USE.
7. To stop Operation. Turn PUMP switch to ‘OFF’. Squeeze and release trigger after shutting o to relieve system of pres-
sure.
8. Prior to storage – Inspect pressure washer for any damage or required maintenance. If your machine is to be exposed
to cold weather, please refer to winter pump instructions found in this manual. If possible, do not allow unit to remain
outside in the elements.
9. Warning – If unit is left running while not in use, pump damage may occur. Do not leave unit running while not in use!
9
Chemical Application
NOTE: Do not remove back flow preventer as chemical may flow back into potable water source. For standard chemical injec-
tion, ensure the black nozzle is properly fitted at the end of the wand. The chemical injector will not function if this nozzle is not
fitted.
1. Chemical preparation – Select detergent/chemical that best suits your cleaning task. Prepare dilution according to the
manufacturer’s instructions. The volume of chemical being used may be adjusted at valve located on the chemical injector.
2. Insert the intake hose, located on the chemical injector at the pump, into the chemical being used.
3. Fit black nozzle on the standard wand, or for the dual wand, turn adjustment knob on, and adjust for required flow rate.
For high pressure soap systems, the black nozzle is not needed; use one of the other wand nozzles.
4. To apply chemical, engage trigger on pressure wand assembly. Turn chemical injector’s nipple to adjust flow. For the high
pressure soap systems, open ball valve and engage trigger.
5. Chemical can now be applied through pressure wand assembly. It will take 5 – 15 seconds for chemical to travel to spray
nozzle. The volume of chemical being used may be adjusted at the chemical injector.
6. For best results apply chemical from bottom to top, and allow for proper penetration time prior to rinsing. Do not allow
chemical to dry. Rinse from bottom to top and then top to bottom.
10
Maintenance
Daily
1. Check pump oil for proper level and adjust accordingly.
2. Examine the quality of the oil.
3. Check pump for oil and/or water leaks.
4. Inspect and clean inlet filters.
Weekly
1. Examine all fittings, components, hoses, connections, and nozzles for damages, loose parts, or leaks (Replace accord-
ingly).
Recommendation for Oil Changes and Component Replacement
1. Change the oil in the pump after the first 50 hours and every 500 hours after the initial oil change. Use SAE 30 W
Non-Detergent for GP Pumps.
2. Change all other components on the pump as needed.
Water Condition
Use a softener on your water system if local water is known to be high in mineral content. This prevents scale buildup in
heater coil, cleans better with considerably less detergent, prevents streaking on painted surfaces and glass when rinsing.
Winter Pump Protection
The following procedure MUST be used when the pressure washing unit is stored at temperatures below freezing.
1. All water must be drained or blown (via compressed air) from system. Connect a short piece of male fitted ½” garden
type hose on to the female inlet on the pump.
2. Place the open end of the hose into a wide mouthed container of full strength, winter rated, vehicle windshield wash-
ing fluid or Anti-Freeze, RATED FOR MINIMUM -40°F.
3. Connect the pressure wand assembly.
4. Start the pump and engage trigger on the pressure gun. Operate the system until the fluid runs the same color as the
windshield washing fluid. Your machine is now prepared for storage.
5. Disconnect fluid supply, blow out with compressed air, and cap end.
11
Quick Diagnostics And Solutions Guide
Problem Possible Causes Solutions
No pressure
or
very low pressure
Metal in oil ●Examine oil in pump to see if there is metal in oil
●If you find traced or pieces of metal, your pump has damaged compo-
nents
Dirt in water ●Verify if there is direct in nozzle tip or in valves in pump
●If nozzle is plugged, clean or replace it
●If valves in pump are clogged, clean valves
●If valves in pump are damaged, replace valves
Wrong nozzle size ●Make sure you have the right nozzle size
●The black nozzle will drop pressure in order to use chemical injector
and is only for soap or chemical
●If you are not using soap, use a dierent color
Pressure too high Wrong nozzle size ●Make sure you have the right nozzle size
Unloader adjust
improperly or
damaged
●Check pressure of pump with a pressure gauge and adjust to desired
pressure
●If you cannot reduce pressure, replace unloader
12
Component Identification: Wall Mounted
1 Motor
2 Pump
3 Unloader
4 Water Inlet
5 Chemical Injector Inlet
6 Water Inlet Filter
7 Pressure Switch (Unloader Side)
8 Pressure Switch (Pump Side)
9 Power Cables (Pressure Switches)
10 Power Cable (Motor)
11 Power Cable (Wall Outlet)
12 Electrical Box
13 O/On Knob
13
Component Identification: Cabinet
1 Hose Reel Handle
2 Hose Reel
3 Pump/Unloader/Pressure Switches
4 Chemical Injector Line
5 Chemical Storage Area
6 O/On Knob
7 Electrical Box
8 Motor (Behind Electrical Box)
9 Lifting Bracket x 2
10 Service Access Panel (Rear of Cabinet)
11 Power Cable (Wall Outlet)
12 Water Inlet
14
Pump Repair Kits
Kit Number K309 K311 K312 K313
Part Number 8.756-376.0 GP-KIT-311 8.756-379.0 8.756-380.0
Item Numbers Included In Kit 2, 3, 4, 5, 6, 13, 14, (7),
(15)
31 17, 18, 19, 21, 22 17, 18, 19, 20, 21, 22, 56
Number of
Assemblies In Kit
6 3 3 1
Number of Cylinders Kit Services 3 3 3 1
Model PSI GPM HP Drive
ET1509E17 2610 2.1 3.7 Direct
15
Description / Part Number
Motor, 2 HP
TECHTOP-2HP
Pump, GP ET1509E17
GP-ET1509E17
Unloader, VRT3
8.750-299.0
Pressure Switch, PA PR 16
9.802-458.0
Pump Oil, 1 Quart
8.923-424.0
Chemical Injector
8.756-797.0
Foam Cannon With Bottle
AW-0018-0459
Wash and Wax, Chemical
Quart or Gallon
Wooden Handle, Metal Tip, 5 ft.
ER-T60
Bristle Brush, Yellow, 10”
ER-206
Replacement Parts
Description / Part Number
Trigger Gun, Landa, 5000 PSI
8.751-234.0
Wand, Variable Pressure, 4000 PSI,
1/4” SS
8.711-308.0
Trigger Gun, GP 5010
PJ-GUN-DG5010
Dual Wand, Suttner ST-53
8.710-613.0
QC Nozzle 4 Pack, #3.5
9.802-291.0
Hose, High Pressure, 25 ft.
8.921-149.0
Landa Hose, High Pressure, 50 ft.
8.925-155.0
CoxReel Hose Reel (Wall Mounted)
CR-HPL-N-350K
In-Line Filter
8.709-961.0
QC Nipple, Steel, 3/8” MPT
9.802-171.0
Coupler, Brass, 1/4” MPT
9.802-165.0
Swivel, Stainless Steel, 3/8” M x
3/8” F
8.712-446.0
For other replacement parts, please contact
us at (800) 635-4903
16
This manual is intended for technical personnel to assist in the diagnosis and repair of issues with pressure washers.
Some of the information in this manual will apply to other pressure washer models and may not apply to this model.
This manual is not intended for use by non-technical personnel.
It is advised to always refer to competent technical personnel when repairs are advised to avoid equipment damage or poten-
tial personnel injury.
If you have any technical questions please do not hesitate to call or e-mail
(800) 635-4903
or
Info@sceclean.com
Service Manual
17
Problem Possible Cause Solution
No flow
No power Make sure pump is operating. Check drive belts and couplings, make
necessary adjustments
Trigger gun valve Check trigger gun, repair or replace.
No water source Ensure water supply is not restricted and hoses are in good repair and
not kinked.
Clogged spray nozzle Check spray nozzle, repair or replace
Clogged inlet filter Check inlet filter, repair or replace
Float Valve stuck (optional) Float valves can become stuck in the “UP” position. Manually dislodge
and inspect for problems
Faulty unloader valve Remove and check for proper action, repair or replace
Low pressure, adequate
flow
Incorrect or no spray nozzle Nozzle should be properly sized for the system. Low pressure indicates
that the nozzle in use is too large.
Worn spray nozzle Replace nozzle when it shows signs of internal erosion
Debris in valves Clean valves and check o-rings for pits and cracks.
Lance on low pressure Adjust pressure so the water flows through properly
Unloader is not adjusted cor-
rectly Adjust unloader to proper level.
Pressure gauge inaccurate Use a new pressure gauge on a quick connect at outlet to check system
pressure and replace if gauge is faulty.
Pump packings bad If low pressure persists, pump packings may need replaced.
Low pressure, low flow
Volume Improperly adjusted If unit has volume adjustment, it may need readjustment
Discharge leaks Look for leaks on the discharge side of system.
Downstream chemical injector
(Dema)
Remove the injector and retest system. If the flow is restored, replace the
injector
Loose drive belts If belts do not have proper deflection, replace them.
Pump not running at rated speed Check engine throttle and see that the motor is rated for the same speed
as the pump
Stripped pump drive coupling Inspect coupling and repair or replace.
Defective easy start valve
(optional) Check the start or throttle-back valve for proper operation.
Malfunctioning motor or gear Ensure that the motor or engine is working properly
Unloader stuck in bypass Piston assembly may be stuck or fouled
Low pressure, low flow -
bogs
Outlet restriction Build up can restrict flow. If water is not flowing freely, flush with garden
hose to isolate the clog or restriction.
Clogged nozzle Distorted spray pattern can indicate a clogged nozzle.
Nozzle too small Ensure nozzle is proper size for the system
Hose restriction Correct any kinks or restrictions. Replace crushed hoses
Debris in the system Debris can lodge in the discharge side of the system (valves, fittings,
injectors, filters) Flushing with water may correct it.
Excessive pressure
Small nozzle spray Nozzle must be properly sized for the rated flow and pressure. Reset
unloader or pressure relief if nozzle size is changed.
Faulty pressure gauge Check the pressure gauge using a properly calibrated pressure gauge on
quick connects at the equipment outlet.
Improperly adjusted unloader Adjust to the proper pressure using pressure gauge.
Faulty unloader Check the unloader action. If it is not working properly, it may need
repaired or replaced.
Fluid System Diagnostics - Flow and Pressure (1/2)
18
Problem Possible Cause Solution
Pump chatters
or vibrates
Air in system Inspect places where air can enter the system. i.e. fittings, hose, connec-
tions etc
Chemical line not submerged If the chemical valve is on, ensure that the chemical line is fully sub-
merged in the chemical
Inlet line restricted All inlet connections should be snug and not kinked to reduce the chanc-
es of pump starvation.
Inadequate water supply
Water supply to the system must meet or exceed the rated flow (GPM)
on the serial number plate. Faucet must be completely opened or water
above the tank outlet in a gravity fed system
Float valve stuck
(optional)
If float valve is stuck in the up position, water can not enter the float tank.
Unstick valve if possible of replace if necessary.
Turbulence in float tank
(optional)
Excessive turbulence allows the pump to draw air into the system. Cor-
rect excessive turbulence.
Inlet or inlet strainer clogged Regularly clean the inlet and inlet strainer to keep debris from entering
the float tank
Water supply too hot Inlet temperature should not exceed 140F - 160F range.
Inlet line vibrates
Air in system Inspect places where air can enter the system, i.e.; fittings, hose, connec-
tions etc.
Debris in inlet check valves If there is no float tank and the outlet line does no vibrate, the inlet check
valve may be clogged. Remove debris. Check o-rings under valves.
Outlet line vibrates
Air in system Inspect places where air can enter the system, i.e.; fittings, hose, connec-
tions etc.
Debris in inlet check valves
If there is no float tank and the outlet line does no vibrate, the inlet check
valve may be clogged.
Remove debris.
Pump packing bad If they show signs of ware or damage, replace them
Inlet and outlet lines
vibrate
Inlet and outlet check valves
fouled
Look for the source of debris in the inlet and discharge check valves and
remove.
Fluid System Diagnostics - Flow and Pressure (2/2)
19
Fluid System Diagnostics - Unloader (1/2)
Problem Possible Cause Solution
Very low or no flow Unloader stuck in bypass Isolate the flow problem. If it occurs before the unloader discharge point,
check the piston assembly to see if it is fouled or stuck in bypass mode.
Unloader will not
unload
Debris in unloader Take bottom nut o unloader, identify ball, spring and seat. Clean out any
debris
Sever leak on the outlet of unit Check for leaks and repair
Unloader (flow) cycles
with system under pres-
sure
Improper flow Any variation in flow form what the orifice is sized can cause cycling.
System must produce the rated flow constantly.
Nozzle too small A nozzle that is too small can cause the flow to be reduced.
Nozzle clogged A distorted spray pattern indicates a clogged nozzle
Improper unloader orifice The systems rated output should indicate the proper sized orifice for your
system.
Unloader orifice clogged Check the orifice for clogs and clear out any debris.
Injector orifice clogged If the system has a Venturi injector downstream of the unloader, check
the orifice for clogs.
Other downstream restriction
Scale buildup can restrict flow. Check; controls, valves, switches, trigger
gun, and lance. Descale as necessary and begin preventive maintenance
program for scale prevention.
Pump not delivering the rated
pressure See low pressure or low flow diagnostics.
High water supply pressure Check inlet water supply for excessive pressure.
Unloader (flow) cycles
with system in bypass
No restrictions on the unloader Check unloader bypass port to see if a flow restrictor is properly installed.
Install one if none is present.
Downstream leakage (excessive) Causes the unloader to since a continuing flow and divert it to the closed
gun. Repair or replace.
Accumulator downstream (op-
tion) Remove the accumulator from the system.
Unloader (pressure)
produces smooth flow and
low volume
Unloader adjusted too low Adjust the unloader using the pressure gauge for the correct pressure.
Spray nozzle clogged A distorted spray pattern indicates a clogged nozzle.
Spray nozzle too small A small nozzle causes a reduced flow and cycling may result
Injector orifice blocked If the system has a Venturi injector downstream of the unloader, check
the orifice for clogs.
System not delivering rated flow See flow diagnostics.
Unloader (flow) produc-
es smooth flow and low
volume
Unloader adjusted too low Adjust unloader and regulator until proper pressure is achieved.
Unloader valve stuck in bypass If unloader is sticking, repair or replace as necessary.
Restriction in system
Downstream restrictions can cause a reduction in flow. Check; controls,
valves, switches, trigger gun, and lance. Descale as necessary and begin
preventive maintenance program for scale prevention.
20
Fluid System Diagnostics - Unloader (2/2)
Problem Possible Cause Solution
Unloader (pressure) pro-
duces low flow and normal
pressure
Unloader adjusted too low If the unloader is diverting flow to bypass it may be adjusted too low,
readjust as necessary.
Spray nozzle too large Ensure the proper nozzle is installed on system.
Internal nozzle erosion The number of hours of usage can give you a clue to the extent of the
ware. If in doubt, change.
Insuicient pump pressure Check pump seals and packings and tighten drive belts.
Unloader (pressure) pro-
duces low flow and normal
pressure
Unloader adjusted too low If the unloader is diverting flow to bypass it may be adjusted too low,
readjust as necessary.
Spray nozzle too large Ensure the proper nozzle is installed on system.
Internal nozzle erosion The number of hours of usage can give you a clue to the extent of the
ware. If in doubt, change.
Insuicient pump pressure Check pump seals and packings and tighten drive belts.
Unloader (flow) produc-
es low flow and normal
pressure
Unloader adjusted too low If unloader is diverting flow to bypass, readjust using the pressure gauge.
Nozzle too large Ensure the proper sized nozzle is being used.
Unloader (pressure) leaks
from main spring or ad-
justing bolt
Shaft O-ring in valve body warn Check O-rings for ware or damage and replace as necessary.
Unloader (flow) pressure
increases when trigger
released
Unloader piston stuck or frozen Check unloader shaft for proper action. Unstick piston and shaft or
replace unloader
Bypass port clogged o restricted Ensure that unloader bypass port is not clogged
Excessive tension on main spring If tension is incorrect, adjust or replace as necessary
Unloader (flow) leaks wa-
ter around adjusting bolt Sleeve O-ring worn Check O-rings for ware or damage and replace as necessary.
Table of contents
