5.1. Changing tools
•
Always return the engine to “IDLE” and turn the control knobs to the "OFF" position before disconnecting
hoses.
•
Once the tool has been changed, advance the engine to “FULL” throttle and turn the valve(s) to the "ON"
position depending on flow requirements of the tool to be used.
5.2.
Cold weather operation
The power unit and tools will perform well in extreme cold weather if the warm-up procedures are followed. These
precedures should be used anytime the temperature is below 40 degrees fahrenheit (4.4 C). In extremely cold
climates, changing to an aircraft quality hydraulic oil (mil. Spec. H-5606) will reduce the warm up time required.
When warm weather returns, be sure to change back to a higher viscosity hydraulic oil.
•
Start the power unit and let it run until it is running smoothly with the choke OFF.
•
Connect the power transmission hoses to the power unit and couple the power transmission hose tool ends
together forming a “loop”.
•
Turn tool control valve “ON” to circulate oil through the hose.
•
When the oil reaches 50 degrees fahrenheit (10 C) you may begin to operate the tools.
NOTE!
•
Refer to operating procedures of this manual before starting
NOTE!
•
Hydraulic system performance is affected when the temperature drops
below 50° F. Therefore, measures should be taken to pre-warm tools and
fluids before operating.
10 av 24
OPERATION AND MAINTENANCE MANUAL I ENG_OMM_MODULAR_POWER_UNIT_RM_P01 I 21th February 2022
@Pandrol 2021
