Danfoss PVH57-63 Variable Displacement Piston Pump Instructions
- June 9, 2024
- Danfoss
Table of Contents
Danfoss PVH57-63 Variable Displacement Piston Pump Instructions
PVH57/63
All parts shown are included in control kit.
Pressures must be set by user to circuit requirements.
Notes:
- ‘‘F ’’ type equal SAE threads
- ‘‘M’’ type equal metric threads
- ‘‘B’’ and ‘‘C’’ thru-drives created from ‘‘A’’ thru-drive pump with ‘‘B’’ or ‘‘C’’ thru-drive adapter kit installed.
- All screws/O-rings are included with each ‘‘kit’’ to convert from ‘‘A’’ to ‘‘B’’ or ‘‘C’’ thru-drive unit.
Typical Cross Section
Note
Parts are shown as installed for right hand rotation. For left hand rotation,
install control rod and control piston in valve block port #2. Install bias
rod, bias piston and spring in valve block port #2.
Pump Startup
Make sure the reservoir and circuit are clean and free of dirt and debris
prior to filling with hydraulic liuid.
Fill the reservoir with filtered oil to a level sufficient to prevent vortexing at suction connection to pump inlet. It is good practice to clean the system by flushing and filtering using an external slave pump.
Before starting the pump, fill with fluid through one of the ports. This is particularly important if the pump is above the fluid level of the reservoir.
When initially starting the pump, remove all trapped air from the system. This can be accomplished by loosening the pump outlet fittings or connections before starting the pump, or by using an air bleed valve. All inlet connections must be tight to prevent air leaks.
Once the pump is started, it should prime within a few seconds. If the pump does not prime, check to make sure that there are no air leaks in the inlet line and connections. Also check to make sure that trapped air can escape at the pump outlet.
After the pump is primed, tighten the loose outlet connections, then operate for five to ten minutes (unloaded) to remove all trapped air from the circuit. If reservoir has a sight gage, make sure the fluid is clear —not milky.
Add fluid to the reservoir up to the proper fill level.
Model Code
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