CANOPY AR-OPEN ROPS 3734200 - Caterpillar

Table 1
Tools Needed     Qty    
8T-0857 Pressure Gauge     1    
Personal injury or death could result when towing a disabled machine incorrectly.Block the machine to prevent movement before releasing the brakes. The machine can roll free if it is not blocked.
When possible, engage the parking brake.
Block the wheels.
Illustration 1 g00520259
Location of the towing diverter valve (1) Clamp bolts (2) Spool
A diverter valve is located on the rear of the hydraulic tank. The diverter valve must be shifted in order to provide supply oil to the parking and secondary brake valve.Loosen two clamp bolts (1) on the diverter valve and slide the plate and the spool (2) to the left. After the spool is shifted, tighten clamp bolts (1). This will allow supply oil to flow to the parking and secondary brake valve in order to release the parking brakes for the rear wheels.
Illustration 2 g00540258
Location of the pressure tap for parking brake release pressure
Attach a 8T-0857 Pressure Gauge (0 to 10000 kPa (0 to 1450 psi)) and a line in the pressure tap on the right rear wheel.
When towing the machine, attach tow line to the front tow hooks or rear tow pin only.
Hook up the towing machine. Refer to Operation and Maintenance Manual, "Towing the Machine" for guidelines.
In order to prevent possible personal injury, release the air pressure from the air tank before disconnecting any components of the air system.
Do not exceed the air pressure of 830 35 kPa (120 5 psi) or damage can occur to the air system components.
Note: The air pressure in the air system must be at 550 kPa (80 psi) in order to allow the supply oil to disengage the parking brakes for the rear wheels.
If there is not sufficient air pressure in the air system, the air system can be charged with air from another source.
Before you attempt to charge the system, remove the air pressure from the brake system.
Illustration 3 g00541941
Location of the plug on the forward side of the air dryer
Remove the plug from the side of the air dryer housing. Install a quick connect fitting.
Connect a hose from an outside air supply to the fitting on the air dryer. Charge the reservoirs to at least 550 kPa (80 psi). Do not exceed 830 35 kPa (120 5 psi).
Remove the supply hose.
Disengage the parking brake.
Illustration 4 g00513935
Location of the secondary steering and brake release control
Illustration 5 g00542833
Location of the secondary steering and brake release electric drive pump (3) Secondary steering pump section (4) Parking brake release pump section (5) Electric motor (6) Electrical leads to the switch in the cab
An electric drive pump provides supply oil pressure in order to disengage the parking brakes for the rear wheels. This pump also supplies oil to the secondary steering system. Press the secondary steering and brake release control in order to activate the secondary steering and brake release electric drive pump. Hold the switch until the pressure on the pressure gauge that was installed in Step 4 stops rising.
Apply