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ENGINE: BENCH TEST
69
ENGINE
Installing Engine on Test Bench
Test Procedure
Testing Range of Rebuilt Engines
Horsepower Check·up . . .
Overhaul after Bench Test
BENCH TEST
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A rebuilt engine should be submitted to a rig
test as follows.
Installing Engine on Test Bench.
Place the engine on test bench.
To secure, use clamping arms I. 35100 G/3, front,
and I. 35100 G/4, rear,
as
shown in figures 120
and 12l.
Then connect:
- the engine exhaust manifold to the exhaust
hose of tesl bench (fig. 121);
- the flywheel to bench prop
abaft
through the
mounting flange.
Next tie up fuel and coolant lines.
Instead of low oil pressure indicator sending
unit, connect the oil delivery line to bench oil
gauge.
Eventually wire up the ignition distributor and
generator to the control board.
Fig, 120 - Detail of engine on test bench.
Fig. 12' • Engine on test bench.
In foreground the bench exhaust hose.
Test Procedure.
After starting the engine see whether:
- oil, coolant or fuel leaks occur at faying sur-
faces, lines and gaskets;
- oil circulates correctly and test bench oil
gauge reads 42.7 to 56.9 psi (3 to 4 kg/em')
as
specified;
- troubles are detected in operation.
In case of irregular running, stop engine and
remedy the trouble before proceeding with the test.
It should be noted, however, that during the
initial test period engine operation is still rough
due to friction between contact surfaces of moving
parts which still need breaking in, especially when
pistons and bearings have been replaced, crank-
shaft and cylinders ground.
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