Ditch Witch RT30 - Manual (Page 75)

Service - 74
RT30 Operator’s Manual
10 Hour
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. 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.
To help avoid injury:
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.
NOTICE:
Do not overtighten chain.
Overtightening will cause chain stretch, loss
of machine performance, and possible
premature chain failure.