WACKER Group 0007659, Repair Manual

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Disassembly/Assembly Procedures PG Repair
wc_tx000608gb.fm
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5.13 Testing
See Graphic: wc_gr003501
This procedure requires a vacuum gauge (P/N 28755) and a
tachometer.
5.13.1 Fill the pump housing with cold water until it flows out from the
discharge port.
5.13.2 Tighten the pump cover and the prime plug.
5.13.3 Bring the engine up to operating speed. Check the engine rpm with the
tachometer. See chapter
Technical Data for engine speeds.
Note:
Keep the pump housing filled with water at all times while the
pump is running. If too much water is lost during the test procedure,
stop the engine and prime the pump. It may be necessary to tilt the
pump or partially cover the discharge port, to prevent the water in the
pump housing from being lost while still allowing air to be vented.
5.13.4 Grease the mounting face of the vacuum gauge (1) to ensure a good
seal. Press the gauge over the inlet port.
5.13.5 The gauge reading should slowly climb and then hold steady.
With the gauge still against the inlet port, turn off the engine. The
gauge reading should not change.
Note: See the vacuum chart for appropriate gauge readings.
This test MUST be completed within a few minutes of starting the
pump to prevent the water in the pump housing from getting hot, which
will result in lower readings. If possible, allow cold water to run into the
discharge port while testing the pump.