E-Z Drill builds machines to last. Given the nature of your job, problems can still arise. This troubleshooting chart should help you pinpoint the potential root of your problem and help you get back to drilling as soon as possible.
| PROBLEM |
CAUSE |
REMEDY |
Drill motor runs, but will not drill hole effectively |
Drill may be starved for air
Too high or low feed pressure
Defective or bent drill bit |
Check air compressor for CFM output; check hose size from air compressor; check air inlet screen in rock drill for obstructions
Check for proper feed pressure: horizontal drilling (18-28 psi); vertical drilling (5-9 psi)
Check for bit damage |
Drill retracts slowly from drilled hole or not at all |
In-line flow control valve adjusted improperly (see air-line schematic)
Piston seal is leaking on feed cylinder |
Adjust in-line flow control valve
Replace with seal kit |
Drill will not feed properly, or not at all |
Feed pressure is too low |
Increase feed pressure using regulator control knob: horizontal drilling (18-28 psi); vertical drilling (5-9 psi) |
Air bleeding through regulator housing |
Dirt on seat
Regulator plumbed backwards |
Check for dirt on the seat in the diaphragm assembly
Check for proper plumbing (see airline schematic) |
Drill motor will not run (or just barely runs with no power
Can hear air blowing through the drill |
Lever on back of drill motor may be in wrong position
Drill bit may be stuck either in the bit guide, or the lower drill bracket too tight
Cycling valve may be stuck |
Check the on/off lever to be sure it is set parallel with the drill motor
Make sure the bit turns freely in the bit guide; loosen the lower drill bracket until the bit turns freely
Cover the exhaust with a rag or some other material (DO NOT USE FINGER TO COVER EXHAUST) – turn the drill motor on; back pressure may free the valve, or
Disassemble the cycling valve and clean (see Figure 1 below) |
Oiler is not oiling properly |
Low fluid level
Oil flow is too low or too high |
Refill oiler as needed
Adjust oiler |
Drill bit is binding in hole |
Feed pressure is too high
Damage to drill bit
Steel or rebar in concrete |
Lower feed pressure with regulator knob; horizontal drilling (18-28 psi); vertical drilling (5-9 psi)
Check for damage and replace if needed
Check for steel in concrete |
Dirt not being cleaned out of drilled hole |
Drill bit is clogged
Air tube in rock is pinched or damaged |
Check drill bit for obstructions
Check for damage to air tube in rock drill |
Unit is not drilling parallel to concrete or at an angle |
Angle adjustment is properly set |
Adjust as per parts book |
Unit will not adjust up or down |
Setscrews are too tight |
Loosen setscrews as per set up in parts book |
Drill bit(s) not retracting all the way out of the drilled hole(s) |
Return stop rod on carriage is not properly adjusted
Guide plates are not properly adjusted |
Adjust return stop rod; ensure bit is retracted ample distance inside the dust deflector
Adjust guide plates, particularly when using screw-on bits |
Drill bit sticks in guide bushing when retracting |
Return stop rod on carriage is not properly adjusted |
Adjust return stop rod |