Ditch Witch RT120 - Manual (Page 183)

Service - 182
RT120 Operator’s Manual
500 Hour
Plow
Change Plow Vibrator Oil
Change plow vibrator oil every 500 hours. If
normal operating temperature exceeds 100°F
(38°C), change plow vibrator oil every 250 hours.
Drain oil at drain plug (2). Replace plug and
move plow vibrator to horizontal position. Add
MPL at fill until oil is halfway up sight glass (1).
Refill capacity is 4 qts (3.8 L).
Trencher
Adjust Headshaft Bearing
Adjust headshaft bearing every 500 hours.
To adjust:
1. Remove cover. Remove bolts attaching
trenching attachment motor to gearbox.
2. Remove bolt and washers in left end of
headshaft.
3. Support gearbox with hoist and slide it off
headshaft.
4. Install spacer (p/n 184-044) in place of
gearbox while checking bearings.
5. Replace bolt on end of headshaft.
6. Remove chain from headshaft sprocket.
7. Turn chain sprocket until headshaft sprocket turns. When properly adjusted, it will take two hands and
some effort. If it turns easily, remove a shim.
Hot parts may
cause burns. Do not touch until
cool.