CORE AS-AFTERCOOLER 4334243 - Caterpillar

Removal Procedure
Start By:
Remove the pump drive shaft.
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 attachments have been lowered, 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.
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.
Note: Install caps and plugs on all openings in order to prevent dirt or debris from entering the system. Cleanliness is an important factor. Before the removal procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal components.Note: For easier assembly, mark all hose assemblies, tube assemblies,wire harnesses and cables for identification purposes.
Drain the hydraulic system. Remove the plug from the ecology drain at the bottom of the hydraulic tank. Drain the hydraulic oil into a suitable container for storage or disposal. The capacity of the hydraulic tank is 38 L (10 US gal).
Illustration 1 g00636110
Remove bolt (1). Remove bolts (3). Remove the washers that hold two split shields (2) to the machine frame.
Illustration 2 g00636111
Remove bolts (4) and remove the washers from pump drive shaft (5). Remove pump drive shaft (5) from the piston pump.
Illustration 3 g00636113
Disconnect tube assembly (6) from valve (8) and valve (10) .
Remove hex head bolts (9) that hold compensator valve (10) to the piston pump. Remove compensator valve (10) from the piston pump.
Remove bolts (7) and remove the washers that hold combination valve (8) to the piston pump. Remove combination valve (8) from the piston pump.
Illustration 4 g00636115
Remove bolts (11) from elbow (12). Move elbow (12) and remove the seal from the piston pump.
Illustration 5 g00636116
Disconnect hose assembly (14) from piston pump (13) .
Remove nut (18) and remove the washer from the shaft of the piston pump .
Remove yoke (16) from piston pump (13) .
Remove bolts (15) and remove the washers that hold bracket (15) to piston pump (13) .
Remove mounting bolts (19), the washers and rubber mountings (20) that hold mounting bracket (17) to the machine frame. Remove mounting bracket (17) from the machine frame.
From the left side of the machine, position a suitable lifting device to the piston pump. Secure the lifting device to a hoist. The weight of piston pump (13) is 50 kg (110 lb). Remove the piston pump from the machine.