Miller ENPAK, Owner'S Manual

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OM-261050 Page 32
7-4. Hydraulic System Prestart Checks
NOTICE − Ensure hydraulic system is properly connected with valves open before starting unit. Damage will result if unit is run before hydraulic system
is complete. Hydraulic pump does not disengage via clutch.
Unit is shipped set for 10 GPM. Contact Factory Authorized Service Agent for pump flow rate changes. See Section 10-3.
7-5. Hydraulic Pump Operation
Unit is shipped set for 10 GPM. Contact Factory Authorized Service Agent for pump flow rate changes. See Section 10-3.
There are 3 modes that the EnPak can be placed in to deliver hydraulic output as required. This is done using the crane pendant.
NOTICE − Check crane manufacturer information to confirm the following operation.
1 Automatic speed control:
Most crane systems default to automatic speed control when first started. To place the EnPak in automatic speed control, if it is not there already, place
the crane pendant speed switch in high speed.
For open center systems, the EnPak will deliver only the required hydraulic output, based on the trigger command from the crane pendant. So for small
trigger commands from the crane pendant, the EnPak will go to 2600 RPM and deliver up to 6 GPM of flow from the hydraulic pump. For medium trigger
pulls, the EnPak will go to 3200 RPM and deliver up to 10 GPM.
Closed center systems do not have a proportional signal available, so there is no operation at 2600 RPM.
2
Low speed lock:
For both open and closed centered systems: Placing the crane pendant speed switch in the low speed position will lock the EnPak at 2600 RPM for
crane loads. If other loads are applied at the same time, the EnPak will go to the required RPM. When the EnPak is locked at 2600 RPM for crane
loads, the hydraulic output is limited to a maximum of 6.5 GPM (open center) or 10 GPM (closed center).
3
High speed lock:
For both open and closed centered systems: The EnPak can still be locked at 3200 RPM on most systems, by toggling the crane pendant speed switch
into high, then into low, and then back to high (each switch transition must occur within 3 seconds). The EnPak will then be locked at 3200 RPM and
have maximum hydraulic output. The EnPak can still be locked into high speed from the EnPak Remote Panel.
EnPak starting with hydraulic load:
To aid in starting the engine during cold weather, the proportional hydraulic valve on the EnPak pump is turned off until the speed of the engine is greater
than 1700 RPM.
Notes