PLUG 5P3685 - Caterpillar

Move throttle control switch (3) to the LOW IDLE position.
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Move engine start switch (4) to the OFF position.
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Remove bolts (5) and the washers from the rear of side panel (6) .
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Remove bolts (7) and the washers from the front of side panel (6). Remove side panel (6) .Note: The cab can be tilted in order to provide greater access to components under the cab. However, the cab must be lowered and fastened before the machine is operated. Refer to Disassembly and Assembly, KENR8176, "Cab - Tilt".
Connect Tool (A) to Tool (B). Make two sets of tools.
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Vibratory Pump is Shown From Right Side
Remove the cap from the low amplitude pressure tap in port "M1" (8). Connect one Tool (B) to the low amplitude pressure tap in port "M1" on the vibratory pump.
Remove the cap from port "M2" (9). Connect second Tool (B) to the high amplitude pressure tap in port "M2" (9) on the vibratory pump.
Move engine start switch (4) to the START position. Release the switch when the engine starts.
Operate the engine at low idle for a few minutes. Move throttle switch (3) to the HIGH IDLE position.
Monitor the hydraulic oil temperature with Tool (C). Operate the machine until the oil temperature reaches 43 6 °C (110 10 °F).
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Move amplitude selector switch (10) to the LOW AMPLITUDE position.
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Actuate vibratory switch (11) on the propel lever.
Watch the pressure at port "M1" (8). Record the initial pressure reading as the main relief pressure. An initial pressure reading registers on the gauge for a brief period of time. Then, the pressure will reduce to the operating pressure. Record the pressure at port "M2" (9). Subtract the pressure recorded at port "M2" from the maximum pressure recorded at port "M1". The pressure differential should be 34500 2400 kPa (5004 348 psi).
Actuate vibratory switch (11) in order to stop the vibratory system.
Move amplitude selector switch (10) to the HIGH AMPLITUDE position.
Actuate vibratory switch (11) on the propel lever.
Watch pressure at port "M2" (9). Record the initial pressure reading as the main relief pressure. An initial pressure reading registers on the gauge for a brief period of time. Then, the pressure will reduce to the operating pressure. Record the pressure at port "M1" (8). Subtract the pressure recorded at port "M1" from the maximum pressure recorded at port "M2". The pressure differential should be 34500 2400 kPa (5004 348 psi).
Actuate vibratory switch (11) in order to stop the vibratory system.
Move throttle switch (3) to the LOW IDLE position.
Move engine start switch (4) to the OFF position.
If the pressure is inside the specified range, go to Step 29. If the pressure is outside the specified range, go to Step 25.
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Remove bolts (12) and the washers from the rear of side panel (13) .
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Remove bolts (14) and the washers from the front of side panel (13). Remove side panel (13) .
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High Amplitude Vibratory Relief Valve
Use the following procedure in order to