HEAD AS 1881867 - Caterpillar

Removal Procedure
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 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.
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: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes.
Open the left side access door and turn the battery disconnect switch to the OFF position.
Illustration 1 g02681837
Use two people to remove right access door (1). The weight of access door (1) is approximately 35 kg (77 lb). Remove the bolts and access door (1) .
Illustration 2 g02681856
Attach a suitable lifting device to tow arm (5) .
Remove the cotter pin and pin (4) that retains hydraulic cylinder (2) to tow arm (5) .
Remove the bolt that retains depth gauge (3) to tow arm (5) .
Lower tow arm (5) .
Illustration 3 g02681860
Disconnect hose assemblies (7) and (10) from valve block (6) and hydraulic cylinder (2) .
Remove the cotter pin, pin (8), and hydraulic cylinder (2) .
Remove the bolts and support assembly (9) .
Remove the nuts, the washers, and the indicator from the top of the platform. Remove depth gauge (3) .
Illustration 4 g02681876
Remove the bolts and move remote drain hose assemblies (11) out of the way.
Drain the hydraulic oil into a suitable container for storage or disposal. Refer to Operation and Maintenance Manual for the correct procedure.
Illustration 5 g02681896
Disconnect harness assembly (16) .
Disconnect hose assembly (15) .
Remove the bolts, the clamps, and hose assembly (12) from gear pump (13) .
Remove the bolts, the clamps, and hose assembly (14) from gear pump (13) .
Illustration 6 g02681898
Remove bolts (17), gear pump (13), and the O-ring seal.