Danfoss Series 40 M46 Tandem, Руководство по обслуживанию, Страница: 5 / 48

Overview
This manual includes information for the installation, maintenance, and minor repair of the Series 40 M46
pump. It includes a description of the unit and its individual components, troubleshooting information,
and minor repair procedures.
Performing minor repairs requires the unit to be removed 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
Global Service Partners and certifies their facilities on a regular basis. You can locate your nearest Global
Service Partner using the distributor locator at www.powersolutions.danfoss.com.
Warranty
Performing installation, maintenance, and minor repairs according to the procedures in this manual will
not affect your warranty. Major repairs requiring the removal of a unit’s front flange voids the warranty
unless done by a Danfoss Global Service Partner.
General instructions
Follow these general procedures when repairing Series 40 M46 variable displacement closed circuit
pumps.
Remove the unit
Prior to performing repairs, remove the unit from the vehicle/machine. Chock the wheels on the vehicle
or lock the mechanism to inhibit movement. Be aware that hydraulic fluid may be under high pressure
and/or hot. Inspect the outside of the pump and fittings for damage. Cap hoses and plug ports after
removal to prevent contamination.
Keep it clean
Cleanliness is a primary means of assuring satisfactory pump life, on either new or repaired units. Clean
the outside of the pump thoroughly before disassembly. Take care to avoid contamination of the system
ports. Cleaning parts using a clean solvent wash and air drying is usually adequate.
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 pump with a protective layer of plastic.
Replace all O-rings and gaskets
Danfoss reccommends you replace all O-rings, seals, and gaskets during repair. Lightly lubricate all O-
rings with clean petroleum jelly prior to assembly.
Safety precautions
Always consider safety precautions before beginning a service procedure. Protect yourself and others
from injury. Take the following general precautions whenever servicing a hydraulic system.
Service Manual
Series 40 M46 Variable Pumps
Introduction
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