BLADE GP 2C9571 - Caterpillar

Sudden movement of the machine or release of oil under pressure can cause serious injury to persons on or near the machine.To prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic system.
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 Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Table 1
Required Tools
Digital Pressure Indicator    
Tool    Part Number    Description    Qty    
A     4C-6500     Digital Thermometer     1    Note: Perform the Relief Valve (Main) - Test and Adjust before you perform this procedure.Note: Perform the following steps before conducting this procedure:
Park the machine in a flat, level spot.
Place the propel control lever in NEUTRAL.
Engage the parking brake.
Stop the engine.
Illustration 1 g01085107
Loosen the set screw. Rotate needle valve (1) clockwise until the valve seats. Tighten the set screw.Note: Needle valve (1) is located in the engine compartment on the right side of the machine.
Start the engine. Operate the engine at 2250 rpm (high idle). Monitor the hydraulic oil temperature with Tool A. Operate the machine until the oil temperature reaches 43° 5.6°C (110° 10°F).
Illustration 2 g01085175
Move speed selector switch (4) to HIGH.
Move parking brake switch (3) to the RELEASE position.
Slowly, move propel lever (2) as far as possible in the forward direction. Slowly, move the propel lever as far as possible in the backward direction. If the machine moves in either direction, repair the brakes.
Engage the parking brake. Stop the engine. Loosen the set screw. Rotate needle valve (1) counterclockwise until the valve stops. Tighten the set screw.