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
REGULAR CHECKS AND MAINTENANCE WORK66
EVERY 200 SERVICE HOURS
Do all 50 and 100 hour servicing at the same time.
BAdjusting V-belt Tension
To avoid personal injury:
A First stop the engine and remove the key.
A After servicing, make sure to replace the belt
cover in its original position.
C Checking and adjustment of the air-conditioner
belt tension
1. Press the air-conditioner belt down in the middle, with
a force of approx. 58.8 to 68.6 N (6 to 7 kgf). The belt
tension is correct if it deflects about 7 to 9 mm. If
otherwise, loosen bolt of the tension pulley and shift
the tension pulley in the direction shown by the arrow.
2. Replace the air-conditioner belt if worn out, cracked or
torn.
A If the engine is run with a loose air-conditioner belt, the
belt could slip and cause insufficient battery charging.
Check air-conditioner belt tension regularly.
A Should the air-conditioner belt break or jump off, the
indicator light for battery charge will light up. Stop the
engine and remove the key immediately.
C Checking and adjustment of the fan belt tension
1. Press the fan belt down in the middle, with a force of
approx. 68.6 N (7 kgf). The belt tension is correct if it
deflects about 12 to 15 mm. If otherwise, loosen bolt
and shift the alternator in the direction shown by the
arrow.
2. Replace the fan belt if worn out, cracked or torn.
A If the engine is run with a loose fan belt, the belt could
slip and cause overheating of the engine. Check fan
belt tension regularly.
(1) Air-conditioner belt
(2) Tension pulley
(3) Air-conditioner compressor
(4) Pulley
(5) Bolt
(A) 7 to 9 mm
(B) Tighten
(1) Fan belt
(2) Alternator
(3) Pulley
(4) Fan pulley
(5) Bolt and nut
(A) 12 to 15 mm
(B) Tighten