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Installation Guide for Danfoss Piston Kit 180R9433

Step-by-step installation guide for the Danfoss Piston Kit 180R9433. Includes instructions for extracting and inserting the piston, spring, and cover, along with torque specifications for VDHT series pumps.

Quick answers from the manual

Quick answer

  • This guide provides instructions for replacing the piston in Danfoss VDHT series high-pressure pumps using the 180R9433 kit. p. 1

Key actions

  • Extracting the piston p. 1
  • Inserting the new piston p. 1

Problems and fixes

O-ring falls out

Replace the O-ring in the cover before remounting.

p. 1

Technical specifications

Parameter Value Meaning Pages
Torque 30 Nm Tightening torque for the 4 cover screws p. 1

Where to find it in the PDF

  • Installation Guide p. 1
Table of contents

Manual images

Click an image to enlarge
Piston extraction procedure Page 1 Piston insertion procedure Page 1

Quick guide from the manual

This document provides the installation procedure for the Danfoss Piston Kit 180R9433, compatible with VDHT 3/4, 1, ED (N), EA (N), BL (N), and BL (M) pumps. The process involves extracting the old piston and spring, and inserting the new components. Ensure you have a 13 mm hexagon key or 6 mm Allen key and a torque wrench ready.

Kit contents

  • Complete piston "10"
  • Spring "11"

Piston extraction

Piston extraction procedure
Piston extraction procedure
  1. Use a 13 mm hexagon key or 6 mm Allen key to unscrew plug "C".
  2. Remove spring "11".
  3. Remove piston "10" by placing a finger into the center of the piston and pulling it out.

Piston insertion

Piston insertion procedure
Piston insertion procedure
  1. Push the new piston "10" into the valve.
  2. Place the new spring "11" behind the piston.
  3. Mount cover "C" ensuring the spring fits into the groove in the cover.
  4. Screw the 4 screws into the cover. Tighten to a torque of 30 Nm.

Important notes

If the small O-ring in cover "C" falls out during disassembly, it must be replaced in the cover before remounting the assembly.

Manufacturer information

Danfoss A/S

Brand profile
Manufacturer website https://www.danfoss.com Support https://www.danfoss.com/en/service-and-support/ Manufacturer manuals https://www.danfoss.com/en/service-and-support/downloads/

Practical help

Common problems

O-ring falls out during disassembly

Ensure the O-ring is replaced in the cover before remounting the assembly.

Before use

  • 13 mm hexagon key
  • 6 mm Allen key
  • Torque wrench capable of 30 Nm

Manual page author

Michael Turner

Technical manual editor

Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.