Ditch Witch SK850 - Manual (Page 78)

SK850 Operator’s Manual
Service - 77
Startup/10 Hour
CMW
®
TR50
Lube Auger Bearing
Lube auger bearing zerk with MPG every 10
hours.
Check Digging Chain Tension
Check digging chain tension every 10 hours and
adjust as needed. With boom horizontal, measure
distance A from bottom of boom to chain. When
properly tensioned, distance A should be 1.5-2.0”
(38-51 mm).
Adjustment Screw:
1. Loosen four clamp bolts (2) so that boom
slides freely.
2. Loosen jam nut on adjustment screw (1).
3. To tighten digging chain, turn adjustment screw clockwise. To loosen digging chain, turn
counterclockwise.
4. When proper tension is reached, tighten jam nut.
5. Torque clamp bolts to 75 ft•lb (102 N•m).
NOTICE: Do not overtighten chain.
Overtightening will cause chain stretch, loss
of machine performance, and possible
premature chain failure.
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