Product Description
Check Valve (CV2) DC Lift
Frequently Asked Questions
Q: What is the RA 520-337/004 check valve used for?
A: The RA 520-337/004 is a check valve (CV2) for DC lift systems in Raymond electric lift trucks. It prevents backflow of hydraulic fluid in one-way circuits and maintains pressure in lift and lowering systems.
Q: Which Raymond lift truck systems use the RA 520-337/004?
A: This check valve is integrated into DC lift pump and motor assemblies in select Raymond reach trucks and electric pallet jacks. Verify your equipment controls and hydraulic schematic to confirm compatibility.
Q: What pressure rating does the RA 520-337/004 have?
A: Typical DC check valves in lift systems are rated for 2,500 to 3,000 psi. Verify the specific pressure rating against your equipment specifications to ensure proper hydraulic system protection.
Q: What are failure symptoms for the RA 520-337/004?
A: Symptoms of check valve failure include: slow or jerky lift operation, inability to hold load height, excessive pressure in one direction, or hissing sounds from the valve area. These indicate the valve ball or seat is damaged or stuck.
Q: What is the service life of a DC check valve?
A: DC check valves typically last 3 to 5 years in normal lift truck duty. Life depends on fluid cleanliness, pressure spikes, and thermal cycling. Contaminated hydraulic fluid shortens service life significantly.