A. Hammer Runs Too Slow:
- Steam Or air pressure too low.
- Steam supply line too long or not proper size.
- Steam supply line restricted in some manner.
- Lack of lubrication.
- Worn or broken piston rings or scored cylinder wall. Check this by allowing enough steam to enter the cylinder to hold the ram in about a half-raised position and note whether excessive steam is blowing out of exhaust ports at top of cylinder.
- Piston rod packing gland too tight.
- Excessive steam or air leakage. Blown gaskets or packing.
- Badly worn slide bar wedges or dovetail, or bent trip.
B. Hammer Runs Too Fast
- Excessive steam or air pressure on hard driving indicated by bouncing of hammer on up stroke.
- Ram not making full stroke.
C. Excessive Slide Bar Breakage
- Slide bar key loose.
- Worn dovetail.
D. Hammer Changes Speeds While Operating:
- Boiler or compressor not large enough.
- Boiler feed water allowed to drop too low.
- Loose or torn hose lining.
- Intermittent lubrication caused by defective or empty line lubricator.
- Loose slide bar or badly won dovetail.
E. Hammer Leaks Steam at Main Exhaust Port Constantly:
- Valve not seating properly.
- Scored or broken steam chest liner.
F. Hammer leaks Steam or Air Excessively From Exhaust at Top of Cylinder:
- Worn or broken piston rings.
- Scored cylinder wall.
G. Ram Hangs and Hammer Stops Operating:
- Loose tie cables.
- Rust or burrs on column.
- Piston rings too large and seized up in cylinder.
- Piston packing too tight.
- Bent columns.
Note: Both the Onshore and Offshore Field Service Manuals have troubleshooting guides. These can be found in the Vulcanhammer.info Guide to Pile Driving Equipment.