Perform this test to check condition of the hydraulic SCV relief valve setting (implement operation pressure). This determines if there is sufficient oil pressure to operate implements.
[1] – Park machine safely.
[2] – Install pressure gauge as follows:
Assemble AM105467 coupler, JTO5486 connector, JTO3017 hose, and JTO3345 pressure gauge in pressure port (A).
[3] – Start engine and set throttle at fast idle.
[4] – Check pressure on gauge by activating SCV control handle, read gauge, and release.
Results
– Pressure should be to specification.
– If there is no pressure, repeat test using different coupler. If pressure exists, replace coupler and repeat test.
– If pressure is below specification, the relief valve may be malfunctioning or hydraulic pump may have damaged or have worn parts.