HARNESS AS-MONITOR 2646623 - Caterpillar

Personal injury or death can result from escaping fluid under pressure.Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Do not adjust the main relief valve above the specified pressure. Adjustment of the main relief valve above the specified pressure may cause damage to the gear pump.
Lower the boom to the ground.
Engage the parking brake. Stop the engine.
Release the hydraulic system pressure. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release" for the correct procedure.
Turn the key to the OFF position.
Raise the cab. Refer to Operation and Maintenance Manual, "Cab Tilting" for the proper procedure.
Illustration 1 g02832716
Typical example of "Standard flow control valve (work tool)" (1) Line relief valve (tilt cylinder rod) (2) Line relief valve (auxiliary circuit) (3) Line relief valve (tilt cylinder head) (4) Line relief valve (lift cylinder head)
Illustration 2 g02827436
Typical example of "High flow control valve" (work tool) (1) Line relief valve (tilt cylinder rod) (2) Line relief valve (auxiliary circuit) (3) Line relief valve (lift cylinder head) (4) Line relief valve lift cylinder head)
Remove the standard flow line relief valve that will be tested.
Illustration 3 g01371952
(5) Line relief valve (B) Tooling (C) Drain port (D) Pressure port (E) Tooling
Assemble Tooling (B), as shown. Secure tooling (B) in a suitable holding device.
Install Tooling (E) to Tooling (B), as shown.
Install the line relief valve (5) that will be tested. Install relief valve (5) to Tooling (B). Tighten the relief valve (5) to a torque of 45 5 N m (33 4 lb ft).
Turn the electric hydraulic pump to the ON position. Check for leaks at the connection.
The 3S-6224 Electric Hydraulic Pump only has a 7.6 L (2 US gal) reservoir. Pump damage may result if the pump is operated with an empty reservoir.
Slowly increase the pressure. Record the pressure, when the line relief valve opens. Compare this pressure to Table 4.
Stop the pump.
Table 4
Work Tool Function     STD 272D/ 299D     XPS/XHP 272D/ 299D    
Lift    
24500