Altec DL Series - Energize Pilot System and Record Tank Pressure

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Section 1
Testing
(Continued)
Figure 2 — Gauge On Pilot Drain Quick Disconnect
4. Start the engine. With the engine running at idle, energize the pilot system as
described in Step 4a or 4b.
a. If the unit is equipped with a two speed digger, move the digger shift switch to the
High position.
b. If the unit is not equipped with a two speed digger, fully shift and hold the
intermediate or upper boom hand control in the Retract position.
5. Record the tank pressure shown on the gauge.
6. Turn off the engine. Leaving the pressure gauge turned on, remove it from the tank
pressure quick disconnect and attach it to the pilot pressure quick disconnect, located
on the lower right corner of the lower control valve (refer to Figure 3). Do not rezero
the pressure gauge when relocating it. The same pressure gauge must be
used for both readings.
Figure 3 — Gauge On Pilot Pressure Quick Disconnect
7. Add 160 psi to the tank pressure recorded in Step 5 to obtain the upper value of the
pilot pressure range. Add 155 psi to the tank pressure value to obtain the lower value
of the pilot pressure range. (Example: upper value=160+tank pressure; lower
value=155+tank pressure.)
Drain Port
Test Quick
Disconnect
Pilot Pressure
Port