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
OTHER ADJUSTMENTS AND REPLACEMENTS80
To avoid serious injury or death:
A Do not work under the machine in this
condition.
A For your safety do not rely on hydraulically
supported devices, they may leak down and
suddenly drop or be accidentally lowered.
To avoid personal injury or death:
A When lifting the machine itself with an
attachment, place a safety block or safety post
to prevent the machine from turning over. Keep
the lock lever for attachment control in the
"LOCK" position.
A Make sure that no obstacles, such as stones are
caught in the track. Remove such obstacles before
adjusting the track tension.
A Track seam
The ends of the rubber track are joined with a seam.
When adjusting the tracks, the seam must be
positioned on the top midway between the idler and
the sprocket.
If the seam is positioned incorrectly, the tracks will be
tensioned too loosely, and a further readjustment will
be necessary.
A Rotate the track after adjustment one to two times to
check the tension.
A Additionally following points are to be observed when
adjusting rubber tracks.
(1) If the track loosen more than 50 mm, readjust
them.
(2) Check track tension 50 hours after initial use and
readjust if necessary. Check and adjust thereafter
every 50 service hours.
BSpecial Information when Using Rubber
Tracks
1. When turning, make a slow swing turn. Avoid spin
turns to reduce lug wear and entry of dirt.
2. The relief valve may be activated if too much dirt and
sand clog the tracks. In this case move the machine for
a short distance straight backwards to let the earth and
sand fall off, then a turn can be made.
3. Avoid using rubber track on riverbeds, stony
underground, ferro-concrete and on iron plates. The
rubber can damage as well as increase wear on the
tracks.
(1) Seam (Mark " ")
(A) 10 to 15 mm
(1) Drive sprocket
(2) Idler
(A) 80 to 85 mm