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CHANG E S AND T YPI N G ERRORS RESERVED
CHANG E S AND T YPI N G ERRORS RESERVED
CHANG E S AND T YPI N G ERRORS RESERVED
13. TroUbleshooTinG
Problem Possible cause Possible solution
1. Overheating of headstock
bearing
a. Wrong oil level a. Check oil level and fill / drain oil off
b. Wrong oil b. Use the correct oil
c. Oil is dirty c. Change the oil
d. Dirt blocks oil lubrication main bearing d. Remove dirt
e. Bearing blocked by dirt e. Clean the bearing and change oil
f. Bearing worn f. Replace bearing
g. Bearing in wrong position g. Remove bearing and mount it again
h. Bend or broken spindle h. Replace spindle
i. End pressure too high, adjustment wrong i. Adjust end pressure
2. Oil leak gear box and/or
headstock
a. Plug doesn’t close well a. Replace plug
b. Cracks in gear box b. Replace gear box
c. Oil leak in headstock c. Tighten cover screw/replace gas
3. Too much noise or too
many vibrations
a. Bearing worn a. Replace bearing
b. Gear worn b. Replace gear
c. Bent shaft c. Replace shaft
d. Lock bolts loose d. Tighten lock bolts firmly
e. Machine loose on foundation e. Install the machine correctly on the
foundation.
4. Rattling a. Work piece incorrectly clamped a. Clamp the work piece tightly
b. Thrust/main bearing of main spindle too
loose
b. Adjust bearings and main spindle
c. No contact between headstock and
bedway, mounting bolt(s) headstock loose
c. Tighten headstock bolt(s)
d. Play between slide and bedway d. Adjust rear clamp of slide
e. Play between cross slide and top slide e. Adjust the key
f. Wrong cutting angle f. Replace cutter
g. Side of cutting tool worn g. Replace cutter
h. Tool shaft / holder not firm h. Use the right cutting tool
i. Tool not fixed in tool holder i. Clamp/check if tool is fixed correctly
j. Work piece or chuck not balanced j. Balance or reduce spindle speed rate
k. Cutting tool in wrong position k. Remount cutting tool
5. Long work piece bends a. Feed rate too high a. Use lower feed rate
b. Work piece too thin or too long b. Use the steadies and adjust the tool
6. Work not accurate a. Not accurate enough a. Check if the right speed / feed rate
and tool are used for the work piece
7. Shifting fork difficult to
hold
a. Set spring to weak or broken a. Adjust the set screw or replace the
spring
8. Chuck and spindle not
centered
a. Wrong cam position a. Place cam in right position
9. Threadcutting difficult a. Play of leadscrew in longitudinal direction a. Adjust the pressure nut of the
leadscrew
b. Play between slide and cross lide or
between cross slide and top slide
b. Place the gib of the slide in the right
position
c. Worn thread or nut in cross slide or top
slide
c. Adjust or replace
d. Large play in handwheel d. Re-adjust handwheel sleeve
10. Tailstock not stable on the
bed
a. Movement clamp handle too far or too
short
a. Re-adjust nut of clamp block
73


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