As an expert on Kranzle pressure washer repair, I’m excited to share a comprehensive guide to help you diagnose and fix common issues with your Kranzle pressure washer. Whether you’re experiencing complete pressure loss, pulsation pressure loss, or cavitation pressure loss, this guide will provide you with the technical details and step-by-step instructions to get your Kranzle back in top working condition.
Primary Types of Pressure Loss
1. Complete Pressure Loss
- Symptoms: No measurable pressure on the gauge, only a small stream of water from the nozzle.
- Causes: Malfunctioning unloader valve or bypass valve.
- Repair: Replace or clean the unloader valve.
- Unloader valve replacement cost: $50-$100 depending on the model.
- Unloader valve cleaning process: Disassemble, soak in a degreasing solution, inspect for wear or damage, and reassemble.
2. Pulsation Pressure Loss
- Symptoms: Half of the output lost on the gauge, rhythmic pulsation like a massage showerhead.
- Causes: Obstructed or damaged check valves.
- Repair: Replace the check valves.
- Check valve replacement cost: $10-$20 per valve.
- Check valve replacement process: Locate the six check valves (three intake and three discharge), remove and inspect each one, replace any damaged or obstructed valves.
3. Cavitation Pressure Loss
- Symptoms: Random pressure loss, often accompanied by unusual sounds.
- Causes: Air in the pump, clogged nozzles, or other issues.
- Repair: Identify and address the root cause.
- Potential causes: Restricted water flow, worn pump seals, damaged impeller, or clogged inlet filter.
- Repair process: Inspect the entire system, clean or replace any faulty components, and ensure proper water flow.
Common Causes of Pressure Loss
- Inadequate flow to the pump: Ensure the water supply is adequate and the inlet filter is clean.
- Recommended water flow rate: 3-5 GPM (gallons per minute).
-
Inlet filter mesh size: 80-100 mesh.
-
Leaking connections: Check all hose connections, fittings, and seals for any leaks and tighten or replace as needed.
-
Common leak points: Quick-connect fittings, high-pressure hose, and pump inlet/outlet.
-
Clogged nozzles: Inspect the nozzle for any debris or buildup and clean or replace it as necessary.
- Nozzle orifice size: Varies by model, typically 0.3-0.5 mm.
-
Nozzle cleaning process: Soak in a descaling solution, use a nozzle cleaning tool, or replace the nozzle.
-
Stuck inlet assembly: Disassemble and clean the inlet assembly, including the check valves and inlet filter.
-
Inlet assembly components: Inlet filter, check valves, and inlet fitting.
-
Malfunctioning check valves: Inspect and replace any damaged or obstructed check valves.
- Check valve types: Ceramic, stainless steel, or brass.
-
Check valve cracking pressure: Typically 2-3 PSI.
-
Unloader valve issues: Clean or replace the unloader valve to resolve complete pressure loss.
-
Unloader valve function: Regulates pressure by diverting water back to the inlet when the trigger is released.
-
Water seals failure (in tank-fed systems): Replace any worn or damaged water seals in the pump.
- Water seal materials: Typically made of nitrile rubber or PTFE.
- Water seal replacement cost: $10-$20 per seal.
Diagnosing and Repairing Pulsation Pressure Loss
- Identify Symptoms:
- Half of the output lost on the gauge.
-
Rhythmic pulsation like a massage showerhead.
-
Check Valve Inspection:
- Locate the six check valves (three intake and three discharge) on the pump.
-
Visually inspect each check valve for signs of obstruction or damage.
-
Replace Check Valves:
- Remove and replace any damaged or obstructed check valves with new ones.
- Ensure the new check valves are compatible with your Kranzle pump model.
Technical Specifications for Repair
Pump Repair Kits
- Available for various Kranzle pump models: AM, APG-15, APG-18, AQ, AZL.
- Repair kit contents: Oil seals, plungers, valve rebuild kits, and other essential components.
- Repair kit cost: $50-$150 depending on the pump model and kit contents.
Unloader Valve Repair
- Replacing or cleaning the unloader valve can resolve complete pressure loss.
- Unloader valve replacement cost: $50-$100 depending on the model.
- Unloader valve cleaning process: Disassemble, soak in a degreasing solution, inspect for wear or damage, and reassemble.
Check Valve Replacement
- Replacing damaged check valves can resolve pulsation pressure loss.
- Check valve replacement cost: $10-$20 per valve.
- Check valve replacement process: Locate the six check valves, remove and inspect each one, replace any damaged or obstructed valves.
Additional Resources
Kranzle USA Repair Videos
- Official videos and articles for diagnosing and repairing Kranzle pressure washers.
- Topics covered: Troubleshooting, maintenance, and step-by-step repair guides.
Kranzle USA Manuals
- Detailed manuals for identifying parts and performing repairs on Kranzle pressure washers.
- Available for download on the Kranzle USA website.
Dirt Killer Shop
- Online store for purchasing Kranzle pressure washers and genuine repair parts.
- Offers a wide selection of Kranzle models and accessories.