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1.0 MAINTENANCE
1.1 TROUBLESHOOTING
WARNING: DISCONNECT THE POWER AND LOCK IT OUT whenever working on the machine
unless the instructions specifically require the machine to be powered (see Power Lockout
Procedure, page v). Some of the following tests may require the machine to be operational
for checking and adjusting. Be very careful that tools and other people are clear of moving parts, and
that the drill is not accidentally operated while adjustments are being made.
CAUTION: Whenever repairing hydraulic components, loosen connections slowly to bleed
off any trapped pressure.
Problem
1. No power
2. Lack of power
3. Drill head won't return
4. Drill head won't come
down
5. Spindle motor stalls
1-2
Area to Check
Power to machine
Fuse blown
Relief valve in pump may be bad
or have dirt in it.
Check oil level - may be low.
Check voltage at machine - may
be low.
Check lift springs - may be broken
or stuck (replace if necessary).
Pull down shafts froze in frame.
Check for broken lift spring - may
be jammed.
Speed control valve out of adjustment
or defective.
Dull drills.
Check for low voltage.
Drive belt may be loose.
Check for paper plugging drills
Solution
Connect Power
Replace fuse
Clean or replace relief valve or pump.
Add oil.
Remove other machinery on line or
provide a dedicated line.
Pry up head, clean & oil shafts.
Pry up head, clean & oil shafts.
Replace spring.
Try to readjust, may have to replace.
Sharpen drills.
(See above).
Adjust belt tension. (See Adjustment
section of this manual).
Clean out hollow drills - We recom-
mend cleaning and soaking drills in
oil overnight.
F.352-KT/EH-3C DRILL/AUG 03
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