21739 Force BEARING, Needle

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
ZZ     6V-9512     Face Seal Plug     1    
6V-9508 Face Seal Plug     1    
6V-9829 Cap As     1    
6V-9511 Face Seal Plug     1    
6V-9832 Cap As     1    
5P-0046 Cover     1    
9U-7092 Tapered Cap/Plug     2    
9U-7091 Tapered Cap/Plug     3    
9U-7087 Tapered Cap/Plug     1    
9U-7086 Tapered Cap/Plug     1    
9U-7081 Tapered Cap/Plug     1    
9U-7080 Tapered Cap/Plug     1    
9U-7076 Tapered Cap/Plug     1    
9U-7075 Tapered Cap/Plug     1    
9U-7073 Tapered Cap/Plug     1    
6V-9833 Cap As     1    
9U-7069 Tapered Cap/Plug     3    
9U-7068 Tapered Cap/Plug     1    Start By:
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
Remove the engine enclosure. Refer to Disassembly and Assembly, "Engine Enclosure Group - Remove and Install".
Remove the muffler. Refer to Disassembly and Assembly, "Muffler - Remove".
Remove the fan guard. Refer to Disassembly and Assembly, "Fan Guard - Remove and Install".
Remove the fan. Refer to Disassembly and Assembly, "Fan - Remove and Install".
Remove the gear pump (fan drive). Refer to Disassembly and Assembly, "Gear Pump (Fan Drive) - Remove".Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.Note: Put identification marks on all hoses, on all hose assemblies, on all harness assemblies, and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.
Keep all parts clean from contaminants.Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
At operating temperature, the hydraulic oil is hot and under pressure. Hot oils can cause burns.To prevent possible personal injury, release the pressure in the implement hydraulic circuit (boom, stick, bucket, and swing), travel circuits, and the hydraulic oil tank at the filler cap before any hydraulic lines or components are disconnected or removed.Remove the filler cap only when the engine is stopped and the filler cap is cool enough to touch.
Move the battery disconnect switch to the OFF position.
Drain the coolant from the system. The capacity of the cooling system is approximately 39 L (10 US gal).
Drain the hydraulic oil from the system. The capacity of the hydraulic system is approximately 255 L (67 US gal).
Illustration 1 g00992583
Loosen hose clamps (1) and disconnect hoses (2) .
Illustration 2 g00992584
Loosen hose clamps (3) and disconnect hoses (4) .
Illustration 3 g00992585
Disconnect hoses (7) .