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.
W
Warning
Unintended Machine Movement
Unintended movement of the machine or mechanism may cause injury to the technician or bystanders.
To prevent unintended movement, secure the machine or disable / disconnect the mechanism while
servicing.
W
Warning
Flammable Cleaning Solvents
Some cleaning solvents are flammable. To eliminate the risk of fire, do not use cleaning solvents in an
area where a source of ignition may be present.
W
Warning
Fluid under Pressure
Escaping hydraulic fluid under pressure can have sufficient force to penetrate your skin causing serious
injury and/or infection. This fluid may also be hot enough to cause burns. Use caution when dealing with
hydraulic fluid under pressure. Relieve pressure in the system before removing hoses, fittings, gauges, or
components. Never use your hand or any other body part to check for leaks in a pressurized line. Seek
medical attention immediately if you are cut by hydraulic fluid.
W
Warning
Personal Safety
Protect yourself from injury. Use proper safety equipment, including safety glasses, at all times.
W
Warning
Product Safety
Steering valves are safety components and therefore it is extremely important that the greatest care is
taken when servicing these products. There is not much wear on a steering valve and therefore they
normally outlast the application they are built into. Therefore the only recommended service work on
steering valves is:
•
Changing seals and o-rings
•
Disassemble, clean, and assemble if contaminated
•
Hydraulic testing, including valve setting
Symbols used in this literature
Non removable part, use a new part
Note correct orientation
External hex head
Mark orientation for reinstallation
Internal hex head
Torque specification
Lubricate with hydraulic fluid
Press in - press fit
Inspect for wear or damage
Pull out with tool - press fit
Service Manual
OSQA/OSQB
Introduction
4 |
©
Danfoss | July 2016
HN25D293 | AX00000127en-US0101
