Service - 184 RT45 Operator’s Manual
As Needed
Microtrencher
Change Blade
1. Start tractor, position microtrencher slightly
above ground, then shut down tractor.
2. Remove 7 wingnuts (1), spanner wrench (2),
and cover (3).
3. Loosen clamp bolts (4) and use spanner
wrench (2) to remove large nut (5). (Insert a
pry bar through cutout in blade to keep blade
from turning.)
4. Remove spacer (6) and blade (7).
5. Clean threads on hub (8) and nut (6). If
needed, apply a dry lubricant such as graphite
or silicone to threads.
6. Install new blade (note direction of rotation), spacer (6), and large nut (5).
7. Use spanner wrench to fully tighten large nut (5).
8. Tighten clamp bolts (4) to 100-120 ft-lb (135-160 N-m).
9. Loosen clamp bolts (4) and repeat steps 7 and 8.
10. Install cover, spanner wrench, and wingnuts.
Hot parts may cause burns. Do not touch until cool.
273-423
To help avoid injury: Do not touch hot blade and bits.
NOTICE:
• Do not use petroleum-based lubricant which can attract and hold dust and grit in threads.
• Do not tighten large nut when blade has contact with ground. Blade may not be straight.
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