RT45 Operator’s Manual Service - 185
As Needed
Bleed Level Cylinder
Bleed air from level cylinder whenever the
hydraulic hoses have been disconnected, or when
excessive bounce is noticed.
To bleed cylinder:
1. Remove blade (see page 184).
2. Start tractor.
3. Use level control to fully retract level cylinder
(1) until it is vertical.
4. Use lift control to lower rear of microtrencher
to just above the ground.
5. Shut down tractor and operate controls to relieve residual pressure in the level cylinder circuit.
6. Connect jumper hose (2, p/n 350-2479) to test ports on left side of microtrencher.
7. Start tractor and set throttle to low speed.
8. Push level control to slowly extend cylinder to full length. Hold lever at full range for 10 seconds. Air
trapped at top of cylinder will return to tank.
9. Pull control lever to slowly retract cylinder. Hold lever for 10 seconds. Air trapped at bottom of cylinder
will return to tank.
10. Repeat steps 7 and 8.
11. Shutdown tractor and remove jumper hose.
Change Spoils Deflector
If not using vacuum system for spoils removal,
change spoils deflectors when excessive spoils
are left inside trench. Deflector is most effective
when it fits next to the blade.
To change:
1. Remove cover.
2. Replace all old spoils deflectors on saw
frame, cover, and spoils chutes, noting
orientation on decal on spoils chute.
3. Install cover.
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