Tangye HYDRAPAK User manual

©Allspeeds Ltd
This equipment is manufactured to the highest
standards of workmanship and will give years of
satisfactory service with the minimum of attention
providing the following points are borne in mind.
The Hydrapak, is a -speed light-weight totally enclosed
pump in corrosion resistant alloys and suitable for use
with oil or water. All pumps are fitted with a standard
low pressure plunger which has an output of 51 cc. per
stroke and a maximum pressure of 5 bar (750 psi), but
there is a choice of six sizes of high pressure plunger
covering a pressure range of 110 to 690 bar (1600 to
10,000 psi). The actual high-pressure of which your
pump is capable (depending on the size plunger fitted) is
indicated on the end cover.
Pressure Plunger Assemblies with the following High-
pressure plunger sizes, are available.
All valves etc. are readily accessible for cleaning and
maintenance and a suction filter is fitted for protection
against the ingress of dirt, etc.
In addition to the operating handle, there are two
controls; a release valve and push/pull pressure
selection button.
The pump is fitted with a rubber faced delivery valve
and ball-type suction valves, one for high pressure and
one for low pressure. When the pump is operating on
low pressure, both high and low pressure pistons are
operative. The action of the pressure selection button is
to lift the low-pressure suction ball off its seat so that
the low- pressure system is rendered inoperative: only
the high-pressure piston is operative at this point.
Choice of the Hydraulic Medium
Oil is preferable as a medium because of its lubricating
qualities. A good quality hydraulic oil of ISO 3 viscosity
should be used.
When water is used it should be clean and soft and be
changed if impurities are picked up during operation.
Operating the Pump
First ensure that the release valve is closed by rotating
the control knob clockwise as far as it will go. Tighten by
hand only. Engage the operating lever in the most
convenient position and check that the pressure
selection button is pulled out. The pump will now
operate on low pressure. When the effort on the lever
becomes excessive (pumping against a pressure over 5
bar), the pump should be changed over to high pressure.
To do this push the pressure selection button in as far as
it will go. Do not apply effort on the operating lever
whilst performing this changeover or you will prevent
the push button from being pushed fully home. Take
care not to operate the pump when oil in the cistern is
low, as air may be drawn in and the system will have to
be vented.
To release the pressure, rotate the release valve control
knob anti-clockwise. If the system is backloaded (as
would be the case with a jack or ram and cylinder still
under load) the valve should be cracked open very
gently in order to prevent rapid return of the ram. The
valve is fully opened by approximately three and a half
turns.
The Operating Lever
The operating lever socket has a square broached hole,
situated off the centre line of the handle axis, so that by
turning it over, additional alternative positions are
available.
Seven positions of lever engagement are possible, at
intervals of 45°, with this arrangement the maximum
swing of the lever is 60°.
Charging and Venting the System
After charging the system with fluid, all air should be
expelled, via an air vent at the highest point in the
system by operating the pump on low pressure. The
Hydrapak Pump may be operated in any position except
one, i.e. on end with the front delivery connection
downwards. When in this position it is not possible to
expel all the trapped air and this will cause inefficiency.
(See later notes).
Rocker Shaft
Occasionally charge the rocker shaft bearing surfaces
with a medium grade grease via the nipple provided.
Suction Strainer
This strainer needs occasional thorough washing out in
clean paraffin to remove all the filtered dirt. Remember
to close the release valve when the suction strainer is
removed otherwise the system will empty itself through
the passageway. After cleaning and replacing the
strainer the pump should be vented.
High Pressure
Plunger diam
1/ " 9/16" 5/8" 3/4" 1" 1 1/4"
Max working bar 690 55 448 310 17 110
Pressure (psi) 10,000 8,000 6,500 4,500 ,500 1,600
Displacement per
stroke (c.c)
3.6 4.6 5.7 8.1 14.5 .6
H DRAPAK PUMP OPERATING INSTRUCTIONS

©Allspeeds Ltd
Suction Connections
The suction connection in the pump body is a 3/8" B.S.P.
threaded hole with a flat-bottomed seat. This provides
for a sealing washer either at the bottom of the hole or
under a stud coupling on the outside face.
Delivery connections
There are two delivery connections positions, one on
the front face and the other on the top _face of the
pump. Either one may be used but not both together. A
delivery valve stopper is screwed into that connection
not in use and as this locates the delivery valve cage in
either position, it must always be fitted and on no
account must a pressure gauge or any other connector
be screwed in direct as an alternative.
The standard fitting for the gauge is direct to the pump,
the back of the gauge lying flush with the top of the
pump body. A banjo and bolt is supplied when mounting
in this manner and must be specially ordered. The
delivery connections are tapped 1/ " B.S.P. and are
suitable for a stud coupling or hose with an external face
joint.
Testing the Pump
When your pump is set up for operation, remove all
trapped air and systematically check as follows:
ALWAYS ENSURE:-
1. That a full effective stroke is possible on low pressure
when the pump is operated at a reasonable speed and
that 5 bar can be developed and held.
. That a full effective stroke is possible on high pressure
when the pump is operated at a reasonable speed and
that the full rated pressure of the pump can be
developed and held.
3. That after several strokes either on high or low
pressure no air is picked up to cause a loss of effective
stroke*. Check that it is not possible to raise high
pressure when on low pressure position.
*A small amount of free movement of the handle is
associated with clearance of the working parts, and
should not be confused with loss of effective stroke due
to other causes.
4. That there is no external leakage of fluid from any
part of the pump.
5. That the fluid is returned back to the system in
reasonable time when the release valve is opened.
6. That the 'Push" "Pull" pressure selection button has a
positive location in either position and that it cannot be
caused to jump out to the low pressure position when
operating the pump rapidly on high pressure.
Trapped Air in the Pump
Air in the pump will cause loss of effective pumping
stroke and will also permit high pressure to be raised
even when the pressure selection button is in the low-
pressure position. It is, therefore, essential to exclude all
air to obtain the best performance. If, after having
vented the system, the pump continues to collect air, a
systematic check should be made on all the seals of the
suction side of the pump to ensure that they are not
defective or loose.
Possible sources of air leakage into the pump are as
follows:-
1. At the suction connection
. Release valve cage joint washer.
3. Release valve stem seal.
4. Suction Filter Joint Washer.
5. Pressure Selection Button Seal.
Should there be a positive suction head on the pump
and if the above items are defective, they will become
sources of external leakage.
Pressure Relief Valve
A pressure relief can be fitted direct into the pump body
and can be set to any desired pressure within the rating
of the pump. Full details on request.
Other Liquids
Although primarily designed for use with oil or water
other liquids can be used in the pump. In certain
circumstances they require special seals. Full details on
request.
IMPORTANT SAFET WARNING
Always check operating pressure of equipment when
using pump. High pressure pump rating stamped on
pump plate.
The connecting hose from pump to equipment should
be of adequate pressure rating, be correctly fitted, and
in good condition. In circumstances where a hose would
be subject to undue flexing, sharp bends, or mechanical
damage; we recommend the fitting of steel piping.
We recommend that any servicing of equipment is
carried out by Tangye Approved Service Agents. Details
of Approved Service Agents on application to Tangye.
FAULT DIAGNOSIS
1. No delivery.
. Pump handle when operated does not operate
plunger.
3. Loss of full delivery.
4. Pump will not change from low to high
pressure.
POSSIBLE FAULT
1. Cistern empty.
. Link plates broken.
3. Air in system.
4. Dirt in system. Remove filter and flush pump.
Tangye – A division of Allspeeds
Royal Works, Atlas Street
Clayton-Le-Moors, Accrington, Lancashire. BB5 5LW, UK
Tel: [phone] Fax: [phone]
Email: [e-mail]
Website: www.allspeeds.co.uk