OPERATING INSTRUCTIONS FOR HTWP21 SERIES
AIR DRIVEN TORQUE PUMPS
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FILLING OF PUMP WITH OIL
Remove the cap (3) from the oil filler.
Stand the pump on a level surface and fill the tank via the filler breather (3) with Hi-force HFO46 oil until the oil
level is at the maximum level as shown on the level gauge. N.B more oil can be added if desired to assist cooling
but never to more than 25mm below the tank lid.
If the pump was supplied full of oil then no further action is necessary.
CONNECTION OF AIR CONTROL PENDANT
The air control pendant has three self sealing quick release connections, one male and two female. The male
connection should be connected to the pendant air supply connection (12) on the pump gauge panel. The female
connectors should be connected to the pendant signal connections (11). One connection controls tool advance and
the other controls tool retract. If the pendant button functions are later found to be incorrect simply swap the
connections.
AIR SUPPLY
An air supply up to a maximum of 10 bar must be connected to the air inlet port (19). However the air regulator (13)
should be adjusted so that the reading on the air pressure gauge (10) is a maximum of 7 bar (100psi). Operating
the pump at above this pressure may result in damage to the motor. The maximum air consumption of the pump is
up to 132m³/h (78 cfm) at maximum pressure and power output. Satisfactory operation can be achieved with lower
flow rates but tool operation will be slower. Add viscosity grade 22 air line lubrication oil, to reservoir (15), via filler
plug adjacent to air lubricator control (14). Do not use hydraulic oil. Adjust the flow of oil using the air lubricator
control to give a drop of oil approx every minute.
CONNECTION OF TORQUE TOOL TO PUMP
Connect the torque tool to the pump using Hi-Force hoses type HTWH. Ensure both halves of the couplers are
clean before connecting.
Connect the female coupler on the red hose to the male tool advance coupler (7). Connect the male end of the
black hose to the female tool retract coupler (8). Connect the other ends of the hoses to the torque tool. N.B. If
using torque tools other than Hi-Force or tools that have been modified, check that the tool is connected correctly
so that the advance pump port is connected to the advance port on the tool. Failure to do this may result in tool
damage or personal injury.
INITIAL OPERATION
Torque wrenches and hoses are not always completely filled with oil when new. For safe and efficient operation the
air must be removed from the system. The following should be carried out with a torque wrench connected to the
pump, but not fitted on a bolt. The torque wrench must be located at a lower level than the pump.
Connect the pump to an air supply. (The motor will not start until a pendant button is pressed.) Adjust the air
regulator control (13) to between 5 and 7 bar, as shown on the air pressure gauge (10).
Press and hold the advance button on the control pendant. The motor will start and the torque wrench should
advance until it reaches the end of its stroke and then the pressure on gauge (5) should start to build up. If the
torque wrench does not advance and pressure is shown on the gauge then it may already be fully advanced. If
there is no pressure registering on the gauge, turn the adjustable pressure relief valve knob (6) clockwise until
pressure shows on the gauge. If the tool retracts, then swap the pendant signal hoses (11).
Press and hold the retract button on the control pendant. The torque wrench should retract until it reaches the end
of its stroke and the pressure should build up to a maximum of 120 bar. If the pressure goes above 120 bar then
the tool is connected the wrong way round. This must be corrected before proceeding otherwise tool damage or
personal injury may result.
Repeat this advance and retract cycle at least 10 times to purge air from the system.
