GASKET 3149947 - Caterpillar

Illustration 2 g00900010
Location of the Hydraulic Connectors (3) Tilt back. (4) Tank port. (5) Raise. (6) Pilot pressure inlet. (7) Dump. (8) Auxiliary 2. (9) Auxiliary 1. (10) Auxiliary valve. (11) LowerNote: The pilot valve in Illustration 2 is for machines with an auxiliary function. Machines without an auxiliary function will not have auxiliary valve (10) .The pilot oil enters the implement joystick at the pilot pressure inlet (6). Illustration 2 shows the position of the pilot pressure inlet, the connector for the return line, and the connectors of the lines which go to the end caps of the main relief valve.
Illustration 3 g00900067
Sectional View of the Joystick ControlTilt Valve in the Hold Position (12) Plunger (13) Lever assembly (14) Adjustment pin (15) Retainer (16) Cup (17) Upper plunger (18) Centering spring (19) Ball (20) Detent coil (21) Retainer (22) Passage to tank port (23) Spool (24) Spring (pressure control) (25) Passage to the return port (26) Passage to the control port (27) Orifice (28) Bias spring (29) Pilot oil supply passage (30) Control port to main control valve (31) Pilot oil supply port When the hand lever is moved, lever assembly (13) will be activated. Adjustment pin (14) will push down on the upper plunger (17).
Illustration 4 g00900573
Sectional View of an Engaged Coil Assembly (12) Plunger. (13) Lever assembly. (14) Adjustment pin. (15) Retainer. (16) Cup. (20) Detent coil.The joystick control is equipped with detent coils. When the joystick control is activated to 90 percent of lever travel, retainer (15) contacts coil assembly (20). If detent coil (20) is energized, the coil assembly will hold retainer (15). The joystick will be held in position until the kickout switch interrupts the flow of current to the coil. When the detent coil de-energizes, lever assembly (13) returns to the HOLD position. Plunger assembly (12) initiates a force against cup (16) in order to assist the spring in pulling retainer (15) from detent coil (20) .The flow of pilot oil through the system is controlled by the cartridge assembly. The movement of each spool in the main control valve is determined by the individual cartridge assembly. The location of the cartridge assembly is shown in Illustration 3. The following sections explain the operation of the cartridge assembly.The Cartridge in the HOLD Position
Illustration 5 g00900497
Sectional View of the Cartridge Assembly (18) Centering spring. (23) Spool. (24) Spring (pressure control). (25) Passage to the return port. (26) Passage to the control port. (28) Bias spring. (29) Passage to the supply port. (32) Hole. (33) Chamber.When the cartridge assembly is in the HOLD position, centering spring (18,), the spring (pressure control) (24), and bias spring (28) keep lever assembly (13) in the HOLD position.Pilot pressure oil flows into the joystick control through the port at the bottom of the valve. Pilot oil flows through passage (31). This is shown in the Illustration 3. The passage takes the oil to port (26) of the cartridge assembly. The pilot oil will flow around spool (23). The pilot oil