Karcher Manifold HR + Control Head Pressure Piston (9.002-029.0)

Karcher 9.002-029.0 Manifold HR + Control Head Pressure Piston

Name: Karcher 9.002-029.0 Manifold HR + Control Head Pressure Piston
Brand: Karcher
SKU: 9.002-029.0
Price: 115.0 AUD
Availability: InStock

SKU 9.002-029.0

BARCODE 4039784984110

By: Karcher

$115.00 - $115.00

$115.00

$115.00 - $115.00

$115.00

Availability: 1 in stock ready to be shipped or picked up

Quantity

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Delivery Options:

→ Pickup available at: 208 Princes Highway, Arncliffe.
→ Same day delivery within Sydney, Australia.
→ We ship nationwide.

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Product Description

Karcher Manifold HR & Control Head Pressure Piston (9.002-029.0)

Ensure your high-pressure cleaning equipment delivers flawless, uninterrupted power with the Karcher Manifold HR + Control Head Pressure Piston (9.002-029.0). Manufactured directly by Karcher, this highly specialized internal pump assembly is a critical component responsible for regulating internal water pressure and managing the machine's automatic start/stop functions. Acting in tandem with the unloader valve, this pressure washer control head utilizes the internal piston to detect when you pull the trigger gun, instantly signaling the motor to activate and deliver high-pressure water to the lance.

When this internal assembly becomes damaged by hard water scale, winter frost, or simple mechanical fatigue, your machine will suffer from severe operational issues. The motor may fail to turn on when you pull the trigger, or it may rapidly pulse and stutter, drastically reducing your cleaning efficiency. By installing this genuine Karcher replacement manifold and piston, you completely restore the system's hydraulic integrity. Crafted from highly durable, pressure-rated materials, this essential pump repair part ensures your Karcher pressure washer returns to its peak, reliable performance for demanding exterior cleaning tasks.

Who Is This Manifold & Piston Assembly Ideal For?

This genuine Karcher control head restores precise motor activation and pressure regulation. It is highly recommended for:

Appliance Repair Technicians: Sourcing exact-fit, OEM pump components to properly rebuild client machines suffering from internal pressure loss and motor pulsing.
DIY Homeowners: Fixing their own Karcher machine that refuses to turn on when the trigger is pulled, avoiding the massive cost of a brand new unit.
Commercial Cleaners: Maintaining the reliability of their workhorse pressure washers, ensuring the auto start/stop system functions perfectly on every job site.
Users with Hard Water: Replacing internal pistons that have become jammed or permanently corroded by severe calcium and mineral buildup.

Key Features and Performance Benefits:

Restores Auto Start/Stop Function: The internal pressure piston accurately detects water flow changes, ensuring the motor turns on immediately when you pull the trigger.
Cures Machine Pulsing: Replaces worn internal seals and cracked manifolds that cause erratic pressure drops and constant machine stuttering.
Genuine OEM Reliability: Manufactured specifically by Karcher (Part 9.002-029.0) to ensure a flawless, watertight fit inside the pump housing.
High-Durability Materials: Engineered from high-strength, corrosion-resistant polymers and metals to withstand immense hydraulic pressure and constant friction.
Cost-Effective Pump Rebuild: Allows you to replace specific faulty internal components rather than discarding the entire expensive pump block.

Technical Specifications:

Brand: Karcher (Genuine OEM Replacement Part)
Product Type: Manifold HR + Control Head Pressure Piston
Part Number: 9.002-029.0
Compatibility: Suits selected Karcher high-pressure washers (Check parts diagram for exact model fitment)
Function: Regulates internal water pressure and activates the motor micro-switch.
Application: Internal water control and system maintenance

Restore perfect pressure regulation and motor activation. Available for nationwide delivery.

Delivery Information

Dispatch: Items marked as “In stock” or “Ready to be shipped” are usually dispatched within 1 business day after payment is received. If an item is not in stock and ordered from our supplier, please allow 3–5 business days for processing before it is ready for delivery or pickup. All standard delivery options still apply.

Shipping: Delivery costs are calculated at checkout based on your location and order size. Bulky items and chemicals may attract additional freight charges and cannot be sent to PO Boxes.

Delivery: Parcels are delivered by road freight. Authority to leave may be used if no one is available to receive the order. For full details, please see our Shipping & Delivery Policy

Business days to delivery

NSW
City	1 Day
VIC
Melbourne	1 Day
Regional	3–4 Days
QUEENSLAND
Brisbane	1–2 Days
Regional	3–4 Days
SOUTH AUSTRALIA
Adelaide	2–3 Days
Regional	4–5 Days
NORTHERN TERRITORY
All Areas	4–6 Days
WESTERN AUSTRALIA
All Areas	4–6 Days
TASMANIA
All Areas	4–6 Days

Frequently Asked Questions

What does the Control Head Pressure Piston do?

The pressure piston sits inside the manifold. When you pull the trigger on your gun, the change in water pressure physically pushes this piston outwards. The piston then presses against a micro-switch, which turns the electrical motor on to generate high pressure.

How do I know if this part is faulty?

If you pull the trigger on your gun and water flows out, but the motor completely refuses to turn on, the pressure piston is likely jammed. Alternatively, if the machine constantly pulses on and off, the manifold may be cracked or the internal seals worn out.

Why does the piston get jammed?

The piston operates in an extremely tight internal cylinder. If you use hard water (bore water), calcium and mineral scale can build up around the piston, causing it to seize. It can also jam if tiny grains of sand bypass the water inlet filter.

Will this part fit my specific Karcher machine?

Karcher has used many different manifold designs over the years. You must check your specific machine's parts diagram or match the part number 9.002-029.0 to guarantee it will fit your pump block.

Does this assembly include the electrical micro-switch?

No. This part is purely the hydraulic/mechanical manifold and the internal piston. The electrical micro-switch box that the piston pushes against is a completely separate component.

Is this an original Karcher part?

Yes, this is a 100% genuine OEM Karcher spare part, guaranteeing precise dimensional accuracy and safety under extreme pressure.

Do I need special tools to replace this manifold?

You will need Torx (star) screwdrivers or Allen keys to dismantle the main pump casing. The manifold itself is usually held in place by metal U-clips or bolts depending on your exact machine model.

Should I use grease when installing this?

Yes. It is highly recommended to apply a small amount of dedicated silicone plumber's grease to the external rubber O-rings before sliding the manifold into the pump head to ensure a perfect, watertight seal without tearing the rubber.

Can I just clean my old piston instead of replacing the whole manifold?

If the piston is just dirty, you can sometimes clean and re-grease it. However, if the plastic manifold itself has a hairline crack, or the internal cylinder walls are scored and scratched, the entire assembly must be replaced to hold pressure.

Is it safe to repair this myself?

Because this repair involves dismantling the pump near electrical components, you MUST ensure the machine is completely unplugged from the wall. If you are not confident, it is always safest to take the machine to a qualified appliance repairer.

How can I prevent this from breaking in the future?

Always use a high-quality water inlet filter to prevent sand from entering the pump, and properly 'winterize' your machine by clearing all water out of the pump before storage to prevent frost from cracking the plastic manifold.

Do you supply spare parts to repair shops?

Yes, Freshway Supplies provides competitive trade and volume pricing for appliance repair businesses and small engine mechanics. Contact us to set up your trade account.