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Instructions for using the portable Hydraulic Tester
0.0 The Tester is designed to measure flow, pressure, temperature and rpm. It can take full
system pressure up to 420 bar (depending on model) and measure flow in both directions
for motor and cylinder testing.
0.1 Make all tests at operating temperatures because as the oil temperature increases it
becomes thinner and any internal leakage becomes greater.
0.2 Testing will be easier and faster if quick disconnect couplers are used to attach the Test Unit.
0.3 There are two basic test 'set-ups' when using either the DHT or DHCR Testers:
A) The In Line test to check out pumps, entire systems and also monitoring operating
conditions.
B) The Tee Test to check out pumps, directional control valves and overall system
condition.
0.4 A preliminary check of the hydraulic system's oil supply, pump rotation, filters, oil lines,
cylinder rods as well as looking for external leaks should be made prior to installing the
hydraulic tester.
1.0 Installing the Test Unit
1.1
Connect the Tester to the circuit, see page 22 for Port Sizes. The inlet and outlet ports
are marked on the turbine block. Use hoses and fittings of sufficient diameter for the flow
being tested. Avoid restrictions at inlet and outlet ports of the Tester. Also avoid sharp
bends because at high pressure hoses will deflect and straighten under pressure.
1.2
When the pressure loading valve is used ensure it is fully opened by turning the knob
counter clockwise.
1.3
When no flow is passing through the turbine, the display will read "L" for "LOW" flow.
1.4
When low pressure testing is required connect the optional low pressure gauge with
quick disconnect coupler only after the pressure has first been checked on the high
pressure gauge. REMEMBER to disconnect the low pressure gauge for high pressure
tests otherwise the gauge will be damaged. Note: An automatic cut-out valve which
protects the LP gauge is available. Consult sales office.
1.5
With the DHCR Testers connect the cable and micro-bore hose assembly at the
readout then connect to the flow block. IMPORTANT after testing disconnect at the
flow block first to avoid oil spillage.
1.6
Connect the remote flow block to the circuit as specified above in 1.1 and 1.2.
1.7
Select "EXT" on switch and program in correct meter factor if not already present.
(see section on programming).
1.8
Continue tests as specified for the hydraulic tester.
Models - DHT and DHCR
6
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