OPERATOR'S MANUAL
Table Of Contents
- OPS - Excavator U48-4 (RD45881312)
- Abbreviation List
- General Symbols
- Foreword
- Safety First
- Contents Page
- Safe Operation
- Dealer Service
- Technical Data
- Description of Machine Parts
- Instrument Panel and Control Elements
- Checks Before Start
- Daily Checks
- Checking the Devices
- Starter Switch
- Display Selector Switch
- LCD Display for Normal Operation
- Warning Lamp
- LCD Display for Warning
- Setting the Clock
- Reordering the year/month/day and Changing the AM/PM System to the 24 hour one
- Log Record
- Periodic Check
- If all the Check Points are not Displayed at a Glance on a Single Screen
- When the Checkup is Completed
- Horn Switch
- Working Light Switch
- AUX Port Flow Rate Limit Switch
- Auto Idle Switch
- Throttle Potentiometer
- Travel Speed Switch
- CAB Type Machines
- Air Conditioner
- Handling the Safety Devices
- Operation of the Engine
- Excavator Operation
- Running-In of the New Excavator
- Starting
- Driving
- Turns
- Up and Downhill Driving
- Parking on a Slope
- Operation of the Dozer
- Two Pattern Selection System (TPSS)
- Operation of the Boom
- Operation of the Arm
- Operation of the Bucket
- Unit Swing and Boom Swing Operation
- Auxiliary Port Operation
- How to Release Pressure Trapped in the Hydraulic System
- 1 Way or 2 Way Circuit Selection Valve Operation
- Auto Idle (AI) Operation
- Important Information on Excavator Operation
- Transporting the Excavator on a Vehicle
- Lifting of the Excavator
- Maintenance
- Maintenance Intervals
- Opening and Closing of Covers
- Daily Checks
- Checking Coolant Level
- Checking Fuel Level
- Checking Engine Oil Level
- Checking Hydraulic Oil Level
- Checking V-Belt
- Checking Radiator and Oil Cooler
- Checking Washer Liquid
- Cleaning Pre-Cleaner
- Checking and Cleaning Engine and Electrical Wiring
- Greasing Boom Swing Fulcrum
- Washing Whole Machine
- Greasing Front Attachments (without Bucket Pin and Boom Swing Fulcrum)
- Greasing Bucket Pin and Bucket Link Pin
- Regular Checks and Maintenance Work
- Other Adjustments and Replacements
- Troubleshooting
- Operation Under Cold Weather Conditions
- Long Storage
- Recommended Oils
- Appendices
- Lifting Capacity
- List of Screens
45EXCAVATOR OPERATION
HOW TO RELEASE PRESSURE TRAPPED
IN THE HYDRAULIC SYSTEM
1. Lower the attachments and the blade down to the
ground.
2. Turn the key to "STOP" position and shut off the
engine.
3. After stopping the engine, turn the key to "RUN"
position.
4. Set the lock lever to "Unlock" position.
5. Move the operating lever to release pressure in the
hydraulic system.
[How to release pressure trapped in the AUX port]
1. Perform the above operations of 1 to 4.
2. Turn "ON" the AUX port enable switch.
3. Make sure that the flow volume in all the AUX ports is
not minimized.
If the pressure is removed after minimizing the flow
volume in the AUX port, release pressure is not
removed completely and the hose coupler may be
unable to connect and disconnect.
4. Move the AUX port knob mounted to the operating
lever to the right and left to release pressure in the
AUX port.
D There are two types of machine, one has the AUX port
knobs mounted to the right and left operating levers,
the other has the AUX port knob mounted to one
operating lever.
Make choice according to the type of machine.
(1) Lock lever for attachment control
(2) Attachment control lever (left)
(A) "Unlock"
(B) "Lock"
(1) AUX port enable switch (Switch 3)
(1) Flow volume in
AUX port display
(A) Flow volume in AUX port
(B) Maximum
(C) Minimum
(B) Maximum status of flow volume in AUX port
(C) Minimum status of flow volume in AUX port