ELBOW AS 3866229 - Caterpillar

Start By:
Connect the steering frame lock.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Turn the disconnect switch to the OFF position.
Personal injury can result from contact with refrigerant.Contact with refrigerant can cause frost bite. Keep face and hands away to help prevent injury.Protective goggles must always be worn when refrigerant lines are opened, even if the gauges indicate the system is empty of refrigerant.Always use precaution when a fitting is removed. Slowly loosen the fitting. If the system is still under pressure, release it slowly in a well ventilated area.Personal injury or death can result from inhaling refrigerant through a lit cigarette.Inhaling air conditioner refrigerant gas through a lit cigarette or other smoking method or inhaling fumes released from a flame contacting air conditioner refrigerant gas, can cause bodily harm or death.Do not smoke when servicing air conditioners or wherever refrigerant gas may be present.Use a certified recovery and recycling cart to properly remove the refrigerant from the air conditioning system.
Recover the refrigerant. Refer to Service Manual, SENR5664, "All Products Air Conditioning and Heating Systems with R-134a Refrigerant" for the recovery and charging procedure. Refer to Special Publication, NENG2500, "Air Conditioning Tools" for the correct tools.
Drain the engine coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct draining and filling procedures.
Illustration 1 g03646884
Disconnect harness assemblies (1) and (2). Disconnect positive cable assembly (3).
Illustration 2 g03647064
View in between the cab and the hydraulic tank.
Disconnect brackets (4) and (5) from the back of the cab.
Illustration 3 g03646898
View under left front side of cab.
Remove ground straps (4).
Illustration 4 g03646918
Remove nuts (7). Lower brake valve (8).Note: Step 8 is for machines equipped with HMU steering only.
Make a temporary mark on connection (9) to assemble in the correct orientation. Remove bolts (10) and disconnect shaft assembly (11).
Illustration 5 g03646924
Bottom right side of cab.
Disconnect hose assemblies (12). Disconnect window washer fluid hoses (13).
Illustration 6 g03646931
Right rear corner of cab.
Close valve (14).Use Tooling (B) to clamp hoses (15). Disconnect hoses (15).
Illustration 7 g03647081
Remove four bolts (16) from the top of the cab.
Illustration 8 g03647122
Attach Tooling (A) and a suitable lifting device to cab (17). The weight of cab (17) is approximately 1270 kg (2800 lb).
Illustration 9 g06088963
Remove bolts (18) and (19). Remove cab (17).Installation Procedure
Install cab (17) in the reverse order of removal.
Tighten bolts (19) to a torque of 850 100 N m (627 74 lb ft).