Ditch Witch Zahn - Manual (Page 69)

Service - 68
R150/R230/R300 Operator’s Manual
10 Hour
CMW
Check Digging Chain Tension
Check digging chain tension every 10 hours and
adjust as needed. With boom horizontal, measure
distance from bottom of boom to chain. When
properly tensioned, distance (A) should be 1.5”
(38 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. Tighten clamp bolts to 75 ft•lb (102 N•m).
Grease Cylinder:
To tighten digging chain, pump MPG into cylinder
at check valve zerk.
To loosen digging chain, stand on opposite side of
boom and unscrew check valve zerk to release
grease.
NOTICE: Do not overtighten chain.
Overtightening will cause chain stretch, loss of
machine performance, and possible premature
chain failure.
Fluid pressure
could pierce skin and cause
injury or death. Stay away.
NOTICE: Service digging boom grease
cylinder only while standing on opposite side of
boom. Wear gloves and safety glasses and
cover fitting with cloth when relieving pressure
in cylinder.