Doosan 844J Wheel Loader Operation and Maintenance Manual (Serial Number 1001 and Up)

Doosan 844J Wheel Loader Table of Contents:

Safety…………………………………………………………………………….. 1-1
To the Operator of a John Deere Wheel Loader …………………………..1-1
General Safety Essentials …………………………………………………………1-4
Location of Safety Labels ………………………………………………………….1-4
Unauthorized Modifications……………………………………………………..1-12
General Hazard Information …………………………………………………….1-12
Before Starting Engine ……………………………………………………………1-20
Machine Operation …………………………………………………………………1-23
Maintenance………………………………………………………………………….1-30
Battery………………………………………………………………………………….1-38
Towing ………………………………………………………………………………….1-40
Shipping and Transportation ……………………………………………………1-41
Operating Controls …………………………………………………………. 2-1
Component Locations ………………………………………………………………2-2
Control Identification…………………………………………………………………2-4
Steering Console and Pedals…………………………………………………….2-5
Front Instrument panel ……………………………………………………………2-14
Transmission Display………………………………………………………………2-22
Right Side Switch Panel ………………………………………………………….2-24
Various Cabin Locations………………………………………………………….2-33
Heater and Air Conditioner Operation……………………………………….2-37
Stereo…………………………………………………………………………………..2-42
Seat Adjustment …………………………………………………………………….2-46
Seat Belt……………………………………………………………………………….2-48
Door Side Latch……………………………………………………………………..2-49
Fuse Box/Relay ……………………………………………………………………..2-50
Window Glass Breaking Tool……………………………………………………2-54

Operation……………………………………………………………………….. 3-1
Instrument Panel Control Functions ……………………………………………3-1
New Machine Break-in Procedures…………………………………………….3-1
Engine Start and Stop………………………………………………………………3-2
Machine Travel ………………………………………………………………………..3-9
Machine Shutdown…………………………………………………………………3-12
Additional Braking ………………………………………………………………….3-14
Boom Raise Kickout ……………………………………………………………….3-14
Boom Lower Kickout (Option)…………………………………………………..3-15
Bucket Angle Indicator ……………………………………………………………3-16
Adjustment of Bucket Position Switch ……………………………………….3-16
Towing Machine……………………………………………………………………..3-17
If Engine Stalls While Traveling ………………………………………………..3-20
Allowable Water Depth ……………………………………………………………3-20
Inspection, Maintenance and Adjustment………………………… 4-1
Preventive Maintenance ……………………………………………………………4-1
Table of Recommended Lubricants…………………………………………….4-3
Fluid Capacities……………………………………………………………………….4-5
Maintenance Intervals ………………………………………………………………4-6
10 Hour / Daily Service …………………………………………………………….4-9
50 Hour / Weekly Service………………………………………………………..4-18
250 Hour / Monthly Service……………………………………………………..4-25
500 Hour / 3 Month Service …………………………………………………….4-35
1,000 Hour / 6 Month Service ………………………………………………….4-37
1,500 Hour / 9 Month Service ………………………………………………….4-40
2,000 Hour / Annual Service ……………………………………………………4-42
12,000 Hour / Six Year Service ………………………………………………..4-49
Severe Conditions Maintenance……………………………………………….4-50
Handling of Accumulator …………………………………………………………4-51
Check Hydraulic Pressures ……………………………………………………..4-52
Tires and Wheels …………………………………………………………………..4-56
Electrical System……………………………………………………………………4-58
022-00029JE Operation and Maintenance Manual Table of Contents III
Bolt Torque Chart …………………………………………………………………..4-59
Long Term Storage…………………………………………………………………4-60
Transportation………………………………………………………………… 5-1
Loading Machine on a Trailer …………………………………………………….5-1
Summary of Safety Precautions for Lifting …………………………………..5-2
Troubleshooting……………………………………………………………… 6-1
Engine ……………………………………………………………………………………6-1
Hydraulic System …………………………………………………………………….6-3
Travel System………………………………………………………………………….6-5
Steering………………………………………………………………………………..6-10
Braking …………………………………………………………………………………6-11
Electrical System……………………………………………………………………6-11
Specifications ………………………………………………………………… 7-1
General Specifications ……………………………………………………………..7-1
Working Range and Dimensions………………………………………………..7-2
Working Capacities ………………………………………………………………….7-4
Approximate Weight of Workload Materials …………………………………7-4
Index ……………………………………………………………………………… 8-1

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