Procedure To Repair Weld Joint Cracks On Lift Arms
Usage:
BACKHOE LOADERS416B (8SG, 8ZK),
426B (5YJ, 6KL),
436B (6MJ, 7FL),
428B (7EJ),
438B (3KK) BACKHOE LOADERS
426B (5YJ, 6KL),
436B (6MJ, 7FL),
428B (7EJ),
438B (3KK) BACKHOE LOADERS
Problem:
Some cracks have occurred on the 9R-9139 Lift Arm used on backhoe loaders. These cracks occur in the "cross-tube" to arm weld joint as shown in the illustration below.
Solution:
If a crack occurs in this area, repair as follows:
- 1. Arc out crack before re-welding.
- 2. Weld the top and bottom of the tube to a 14.0 mm (.55 in) weld leg which should span at least 90 degrees with no starts or stops near top or the bottom of the "cross-tube".
COPYRIGHT 1996 CATERPILLAR ALL RIGHTS RESERVED
Caterpillar Information System:
Ride Control Switch Ride Control Switch
Ride Control System On Medium Wheel Loaders Built At Caterpillar Beglium Ride Control System On Medium Wheel Loaders Built At Caterpillar Beglium
New Stabilizer Foot New Stabilizer Foot
Mechanical Hoe Quick Coupler Mechanical Hoe Quick Coupler
Hydraulic Tubes To Stabilizer Cylinders Hydraulic Tubes To Stabilizer Cylinders
Include Warranty Claim Number On Core Credit Request Packing List Form (Form No. 01-089513) And Attach Blue Claims Room Tag (Form No. 01-003883) To Each Returned Air Compressor Include Warranty Claim Number On Core Credit Request Packing List Form (Form No. 01-089513) And Attach Blue Claims Room Tag (Form No. 01-003883) To Each Returned Air Compressor
Repair Of Standard Stick B-Plate Cracks Repair Of Standard Stick B-Plate Cracks
Seat Slide Rail Springs Seat Slide Rail Springs
Air Cylinder Piston In The Cylinder Group May Malfunction Air Cylinder Piston In The Cylinder Group May Malfunction
Circuit Breaker Change Circuit Breaker Change
Wiper Group Windshield Wiper Group Windshield
Incorrect Pressure Sensor On Pump Outlet Of Rear Axle Filter System Incorrect Pressure Sensor On Pump Outlet Of Rear Axle Filter System
Idler/Bogie Roller Bearings May Not Be Correct Idler/Bogie Roller Bearings May Not Be Correct
Limiting Hydraulic Oil Flow When Using Auxiliary Valves Limiting Hydraulic Oil Flow When Using Auxiliary Valves
Trims May Loosen On The Rear Of The 820G And 980G Cabs Trims May Loosen On The Rear Of The 820G And 980G Cabs
Nuts Holding The Weight Group To The Compactor Drum May Not Be Sufficiently Tight Nuts Holding The Weight Group To The Compactor Drum May Not Be Sufficiently Tight
Contact For Ordering FT-Drawings Contact For Ordering FT-Drawings
Rear Propel Pump Interlock Solenoid Wires May Break Rear Propel Pump Interlock Solenoid Wires May Break
Aftercooler Core Cracks Aftercooler Core Cracks
Drain Holes May Be Missing On Left Hand Side (LHS) Bumper Tool Box Drain Holes May Be Missing On Left Hand Side (LHS) Bumper Tool Box
Air Filter Precleaner Modification Can Increase Filter Element Life Air Filter Precleaner Modification Can Increase Filter Element Life
Loss Of Modulation May Occur On Some Motor Graders Loss Of Modulation May Occur On Some Motor Graders
Water Leaks Into Cab Through The Roof Seal Water Leaks Into Cab Through The Roof Seal
Regulate Oil Flow For Supplier Attachments Regulate Oil Flow For Supplier Attachments