CONTROL GP-ELECTRONIC 3670070 - Caterpillar

Specification
Table 1
Pilot Relief Valve Pressure Setting    
Date:    Machine Serial Number:    
Machine Settings     Engine Speed    
Engine Speed Dial "High Idle"
Item     Specification     Actual    
Pilot Relief Valve     4100 200 kPa
(595 29 psi)        Introduction
The pilot relief valve limits the pressure in the pilot system. The pilot relief valve setting is adjustable.Required Tools
Table 2
Required Tools    
Pt. No.    Description    Qty    
198-4240     Digital Pressure Indicator Gp        
198-4234     Digital Indicator     1    
198-4238     Pressure Sensor Gp     1    
198-4236     Adapter Cable As     1    Machine Preparation
Place the machine on level ground.
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
Illustration 1 g03260576
Main control valve (1) Pressure tap (2) Jam nut (3) Pressure reducing valve
Connect a 34450 kPa (5000 psi) pressure gauge to pressure tap (1) .Test Procedure
Start the engine.
Place the machine controls at the following settings: engine speed dial "High Idle". Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Place the hydraulic activation control lever in the UNLOCKED position.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Stall any implement function and check the pilot pressure setting at pressure tap (1) .The pilot pressure setting should be 4100 200 kPa (595 29 psi). If the pilot pressure setting is not within the specification, adjust pressure reducing valve (3) .Adjustment Procedure
Illustration 2 g03260677
Main control valve (2) Jam nut (3) Pressure reducing valve
Remove cap from pressure reducing valve (3) to expose the internal hex screw.
Loosen jam nut (2) .
Turn the internal hex screw to adjust the pressure to 4100 200 kPa (595 29 psi).Note: Turn the internal hex screw clockwise to increase the pressure. Turn the internal hex screw counterclockwise to decrease the pressure.Note: Always make final pressure adjustments on pressure increase.
Tighten jam nut (2) to a torque of 14 2 N m (10 1.5 lb ft).
Repeat the "Test Procedure" to confirm the pressure setting.
Replace the cap on pressure reducing valve (3) .