Owner manual

DescriptionItem
Head Assembly4
Cable5
Locknut6
Top of Reservoir7
Shaft8
How to check the low level switch
1. Note the distance between the head assembly of the fixture and the top of the reservoir.
2. Turn on power to the hydraulic power unit.
3. Loosen the locknut on top of the reservoir that holds the assembly in place.
4. Raise the low level assembly high enough to cause the HPU Run Status to flash between Faulted and
Low Level. If the Low Level does not display, replace the low level assembly (Step 5). If the low level
assembly is OK, go to Step 6.
5. Detach the cable and remove the existing low level/temperature fixture. Install the replacement fixture and
attach the cable.
Note:
Ensure that the new fixture has the same length as the old one.
Raise the low level assembly high enough to cause the operator interface to flash Low Level.
6. Lower the fixture back into the reservoir to match the distance between the head assembly of the fixture
and the top of the reservoir, approximately 2.54 cm (1 in).
Note:
If there is a fluid leak, the amount of fluid lost before the Low Level indicator flashes is dependent
on the setting described above. If the fluid level switch is set at 2.54 cm (1 in), the fluid loss would
be 67 liters (17.7 gallons).
7. Press the Reset button on the user interface to clear the interlock and change the HPU Run Status back
to NORMAL.
How to Check the Over Temperature Switch
To check the switch:
1. Turn on power to the hydraulic power unit.
Series 505G2 SilentFlo™ Hydraulic Power Unit Product Information 79
Maintenance