HPRV/port relationshipsHPRV valveControls port BHPRV valveControls port AHPRV valveControls port DHPRV valveControls port CHPRV (60/68)The high pressure relief and pressure limiter valve assemblys may be removed for cleaning andreplacement of the O-rings. HPRV valves are factory set and are not field adjustable. Refer to thepump model code for the factory setting of each valve when ordering replacements.Removal1. Mark the location of each valve prior to removal.2. Using a 22mm wrench remove the HPRVs.3. Remove and discard the Orings (L060) and backup rings (L068).InspectionClean oil off the sealing surfaces and inspect the sealing surfaces for nicks or scratches. Check thevalves for damage. Replace any damaged components.Reassembly1. Lubricate and install new backup rings (L068) and O-rings (L060).2. Install HPRV and pressure limiter valves in their original locations.Service ManualH1 45/53/60/68 Tandem Closed Circuit Axial Piston PumpsMinor repair60 | © Danfoss | June 2018 520L0928 | AX00000103en-US0303
