Pulverizer Troubleshooting
Problem List
Note: This section contains the troubleshooting procedures for the Pulverizer hydraulic systems. Some specific areas may not be discussed.
- The Pulverizer will not rotate.
- The Pulverizer arm will not fully close.
- The cutters will not cut properly.
- The Pulverizer's production decreases.
- Hydraulic oil overheats.
- There is no hydraulic oil flow.
- There is no hydraulic oil pressure.
- There is low hydraulic oil flow.
- The Pulverizer operates erratically.
Problem 1
The Pulverizer will not rotate.
Probable causes
- There is low hydraulic oil supply.
- There is a damaged rotator motor.
- There is debris in the rotator assembly and the ring gear.
- The relief valve is stuck open.
Problem 2
The Pulverizer arm will not fully close.
Probable causes
- There is low hydraulic oil supply.
- There is a dirty hydraulic oil filter.
- The split flange couplings are not properly sealed.
- The cutters are misaligned.
- There is debris in the arm assembly.
- The control valve of the machine is not working properly.
Problem 3
The cutting edges do not cut properly.
Probable causes
- The cutters are dull or chipped.
- The cutters are not properly aligned.
- The spacers for the arms are worn.
- The arm pin is worn or damaged.
Problem 4
The Pulverizer's production decreases.
Probable causes
- The teeth are worn.
- The cutters are worn.
- The cutters are not properly aligned.
- The spacers for the arm are worn.
- The arm pin is worn or damaged.
- The arm cylinder is leaking internally.
- The fittings are not properly sealed.
- There is low hydraulic oil flow.
- The pump for the work tool is worn or damaged.
Problem 5
Hydraulic oil overheats.
Probable causes
- System pressure is too high.
- The hydraulic oil is dirty.
- The hydraulic oil level is low.
- There is incorrect fluid viscosity.
- There is an open relief valve.
- There is damage to the quick connect ports.
- The pump for the work tool is worn or damaged.
- The oil cooler for the machine is clogged.
Problem 6
There is no hydraulic oil flow.
Probable causes
- The pump for the work tool is not receiving hydraulic oil.
- The pump for the work tool is worn or damaged.
- The hydraulic oil level in the tank is low.
- The hydraulic oil lines are clogged.
- There is damage to the quick connect ports.
Problem 7
There is no hydraulic oil pressure.
Probable causes
- There is no hydraulic oil flow.
Problem 8
There is low hydraulic oil flow.
Probable causes
- There is an external leak in the hydraulic system.
- There is low hydraulic oil supply.
- The pump for the work tool is worn or damaged.
Problem 9
The Pulverizer operates erratically.
Probable causes
- There is air in the hydraulic oil.
- There is low hydraulic oil supply.
- There is contamination in the hydraulic oil.
- The pump for the work tool is worn or damaged.
Caterpillar Information System:
P16, P20, P25, P28, P40 and P60 Pulverizers Cutter
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