Reliable pump for hydraulically driven devices

The HTL 201 lubrication pump mounts directly to the hydraulic tool and lubricates continuously throughout the working phase of the tool. The hydraulics of the carrier machine drive the lubrication pump. The pump stays on the tool that is to be lubricated, even if the carrier machine is exchanged.

The HTL 201 is ideal for minimizing friction and wear on hydraulic hammers, grippers or pliers, as well as for mini excavators. The pump can be installed in places where there is “virtually no room” to spare. The HTL 201 offers an optimized function, for example, a change-over piston made from aluminium. The pump enables an output per stroke of 0.22 cm3/min so that an output of 6.7 cm3/min at 200 bar is possible.

The pump comes standard with a 120 bar pressure relief valve. An optional 270 bar pressure relief valve is available that enables the usage of a progressive system with main and secondary metering devices. A check valve in the return line is designed to avoid damage in the event that the pressure and return lines are mixed. A larger, threaded strainer enables simple cleaning of the unit. An integrated fine throttle adjusts the variable lubricant output. The HTL 201 uses 310 ml cartridges with chisel paste or with grease up to NLGI 2. An adapter also enables the usage of 380 or 500 ml standard cartridges.

For applications with higher lubricant consumption, like tunnel boring machines, versions with a refillable reservoir of 8 or 17 litres are available. Thanks to the follower plate, the pump can be built in a horizontal position to save space. The reservoir offers a quasi-analogue lubricant level switch with multiple signal levels divided across the analogue signal range from 4 to 20 mA. The user can monitor lubricant feeding during operation and be informed of low-level events ahead.