Hydraulic Pump; Connect The Hydraulic Hoses - Holmatro Varipump M304 Manual

EN
5.1.2

Hydraulic pump

The motor drives a single-stage or two-stage radial plunger pump which is able to deliver the allowable
pressure at the specified oil volume given in chapter 3.4. Each pump has 2 safety valves to limit the
maximum pressure. The settings of one of the valves can be changed to a lower maximum pressure by
an Holmatro certified technician. The other valve is sealed and can not be changed. If in doubt, consult
the Holmatro dealer.
5.1.3 Quick-lock couplers
The tool is equipped with a male and a female Quick-lock coupler. Quick-lock couplers are pushed into
each other and then lock.
In case of duo hoses, the supply hose and the return hose are bundled together with ties. Each end of
the hose has a female and male coupler.
If you want to connect or disconnect a tool and/or a hose, you must first set the pressure relief valve on
the pump to the "neutral" position. After connecting the hose(s) and the tool you must set the pressure
relief valve to the "operation" position so you can use the tool.
5.1.4 High-Flow couplers
The High-Flow coupler is a screw-on coupler used on a single or duo-hose system.
In case of duo hoses, the supply hose and the return hose are bundled together with ties. Each end of
both hoses has the same coupler: female and male couplers.
If you want to connect or disconnect a tool and/or a hose, you must first set the pressure relief valve on
the pump to the "neutral" position. After connecting the hose(s) and the tool you must set the pressure
relief valve to the "operation" position so you can use the tool.
5.2

Connect the hydraulic hoses

5.2.1 General
Dependent on the type of control valve the pump is equipped with:
• Quick-Lock couplers: one male and one female. These couplers are connected to the hydraulic
hose(s) with the flow direction in such a way that the hydraulic oil flows from the male into the
female coupler.
• High-Flow couplers: two male or two female couplers.
WARNING
Never use damaged couplers.
Caution
Never use pliers or similar tools to connect the hydraulic couplers.
5.2.2 Connect the Quick-Lock couplers
Refer to Fig. 9.
WARNING
Always make sure that the pressure relief valve is in the "neutral" position, before you
connect hydraulic hose(s) to the pump.
• Turn the retainer ring on the female coupler anti-clockwise to unsecure the lock ring.
• Remove the dust cap from the female coupler by pushing back the lock ring. The dust cap slips off.
• Pull the dust cap from the male coupler.
44
All manuals and user guides at all-guides.com
916.219.123_002 Varipumps