Overview; General Instructions; Remove The Unit; Keep It Clean - Danfoss PVG 32 Service Manual

Service Manual
PVG 32 Proportional Valve Group
Introduction

Overview

General instructions

© Danfoss | February 2017
This manual includes information for servicing PVG 32 valves. It includes a description of the units and
their individual components, troubleshooting information, and minor repair procedures.
Performing minor repairs may require removal from the vehicle/machine. Thoroughly clean the unit
before beginning maintenance or repair activities. Since dirt and contamination are the greatest enemies
of any type of hydraulic equipment, follow cleanliness requirements strictly. This is especially important
when changing the system filter and when removing hoses or plumbing.
A worldwide network of Danfoss Global Service Partners is available for major repairs. Danfoss trains and
certifies Global Service Partners on a regular basis. You can locate your nearest Global Service Partner
using the distributor locator at www.Danfoss.com.
For specifications and operating parameters on PVG 32 valves, refer to PVG 32 Technical Information
Manual 520L0344.
Do not attempt to service PVG valves without build sheet specifications for reference.
Follow these general procedures when repairing PVG 32 valves.

Remove the unit

Chock the wheels on the vehicle or lock the mechanism to inhibit movement. Prior to performing repairs,
remove the unit from the vehicle/machine. Be aware that hydraulic fluid may be under high pressure
and/or hot. Inspect the outside of the valve stack and fittings for damage. Cap hoses after removal to
prevent contamination.

Keep it clean

Cleanliness is a primary means of assuring satisfactory motor life, on either new or repaired units. Clean
the outside of the valve thoroughly before disassembly. Take care to avoid contamination of the port
connections on the valve stack. Clean parts using a clean solvent wash and air dry.
As with any precision equipment, keep all parts free of foreign materials and chemicals. Protect all
exposed sealing surfaces and open cavities from damage and foreign material. If left unattended, cover
the valve with a protective layer of plastic.

Replace all O-rings and gaskets

Danfoss recommends you replace all O-rings. Lightly lubricate all O-rings with clean petroleum jelly prior
to assembly.

Secure the unit

For repair, place the unit in a stable position with the shaft pointing downward. Secure the motor while
removing and torquing controls, and valves.
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