SNAP 4205372 - Caterpillar

Table 1
Required Tools    
Part Number     Part Description     Qty    
177-7861     Hose Assembly     1    
6V-4143     Coupler     2    
8T-0859     Pressure Gauge (0 to 25,000 kPa (0 to 3,600 psi))     1    
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, 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.
Personal injury or death can result from sudden machine movement.Sudden movement of the machine or release of oil pressure can cause injury to persons on or near the machine.To help prevent possible injury or death, refer to the information in Testing and Adjusting, "Machine Preparation for Troubleshooting".
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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
When the eject sequence valve is correctly adjusted, the eject cycle will occur in the correct sequence. When the body is ejected from the fully retracted position, the tailgate should first open fully before the ejector plate starts to move.
Damage to the ejector body or ejector body tailgate may occur if the eject cycle sequence is not correct.
Test and Adjust
Illustration 1 g01184518
(1) Eject sequence valve
Illustration 2 g01184519
(2) Adjustment screw (3) Locknut
Illustration 3 g01184918
(4) Manifold (5) Pressure tap
Stop the engine and install a 8T-0859 Pressure Gauge to pressure tap (5). Pressure tap (5) is located on manifold (4) at the rear of the transfer gearcase.
Loosen lock nut (3) in order to turn adjustment screw (2). Turn adjustment screw (2) clockwise until there is no more adjustment.
Start the engine and run the engine at high idle.
Move the hoist control lever to the EJECT position.
Hold the hoist control lever in the EJECT position, and adjust the eject sequence valve. When the tailgate has reached the fully lowered position, turn adjustment screw (2) counter-clockwise until the ejector plate moves. The pressure should be 13100 to 15510 kPa (1900 to 2250 psi).
If the pressure is incorrect turn adjustment screw (2) until the pressure is 13100 to 15510 kPa (1900 to 2250 psi). Make sure that the tailgate is in the fully lowered position before the ejector plate moves. Tighten lock nut (3) .
Stop the engine.