COUPLING AS- 3236177 - Caterpillar

Removal Procedure
Start By:
Remove the air cleaner. Refer to Disassembly and Assembly, Air Cleaner - Remove and Install for the correct procedure.
At temperatures lower than −15° C (5° F), care should be taken when removing the Diesel Exhaust Fluid (DEF) line connectors. To limit possible damage to the DEF line connectors, carefully apply heat to the area of the DEF line connectors.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
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.Dispose of all fluids according to local regulations and mandates.
Open the left side access door and turn the battery disconnect switch to the OFF position.
Drain the coolant from the cooling system into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct draining.
Illustration 1 g06081860
Remove the bolt, the washer, and plate (1).
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Drain the diesel exhaust fluid into a suitable container for storage. Remove drain plug (2) to drain the diesel exhaust fluid.
Illustration 3 g06079810
Disconnect harness assembly (3).
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Disconnect diesel exhaust fluid lines (6) from the DEF heater. Refer to Disassembly and Assembly, "Diesel Exhaust Fluid Lines - Remove and Install" for the correct procedure.
Disconnect two hose assemblies (5) from the DEF heater.
Loosen the jam nuts. Slide the bolts through the slots in the plate to remove two straps (7). Remove diesel exhaust fluid tank (4).Installation Procedure
Install diesel exhaust fluid tank (4) in the reverse order of removal.
Tighten the four bolts that secure straps (7) to a torque of 5.5 0.5 N m (49 4 lb in).End By:
Install the air cleaner. Refer to Disassembly and Assembly, Air Cleaner - Remove and Install for the correct procedure.