Bush Hog®
Boom Mowers

Bush Hog® Extend your reach and productivity!

RMB1445-1, RMB1660-1, RMB1865-1 and the PT5 Powertrim-2

The ultimate in versatility, Bush Hog’s rugged, tractor-mounted boom mowers are designed to trim trees, brush or hedges and mow behind guardrails, over fences, down embankments and around ponds. With four models reaching 11 to 18-feet from the tractor centerline, there’s almost no limit to what you can accomplish. They’re easy to operate and built to provide years of dependable service.

NOTE: (RMB models to be used on tractors equipped with cabs only, and for rotary mower heads, protective screen material must be installed.)

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NOTE: Unit(s) shown equipped with certain selections and options; please consult with your local Bush Hog dealer for all available configurations.

Features

Construction Features
  • RMB models offer optional accessories such as a lift float kit and skid kit on certain models.
Product Features
  • FLAT HEAD Attachment ( Fitting the RMB1445 / RMB1660 / RMB1865 Boom Mowers) See Specifications for more details.

  • CUTTER BAR Attachment ( Fitting the RMB1445 / RMB1660 / RMB1865 Boom Mowers) See Specifications for more details.

  • ROTARY HEAD Attachment ( Fitting the RMB1445 / RMB1660 / RMB1865 Boom Mowers) See Specifications for more details.

  • PT5-2 POWERTRIM 3/4” Cutting Capacity 59” Cutting Width (All booms equipped with hydraulic or mechanical breakaway.)

  • RMB1445-1, RMB1660-1, RMB1865-1 (RMB models to be used on tractors equipped with cabs only.)

  • All RMB models offer self contained, fully independent hydraulic systems with twin pumps for optimum cutting performance

  • The unique PT5 is powered by the tractor’s hydraulic system, requiring only 3.7 gal/min. flow to operate the unit. A Flow Control Valve Kit comes standard on current models to divert excess hydraulic flow back to the tractor. The PT5 fits tractors as small as 15 HP. Its unique “swing over” design enables the unit to workon either side of the tractor. The PT5 is equipped with a swing arm, sickle bar head to meet the pruning needs of horticulturists and landscapers alike.

Specifications

BOOM MOWERS: RMB1445-1 RMB1660-1 RMB1865-1 PT5 Powertrim-2
Tractor Engine HP / Weight (Min.) See Head Selection Chart Below; Varies Based on Head Choice
Tractor PTO 540 540 540 NA
Machine Weight w/Flail* 1220-lbs. 2403-lbs. 2470-lbs. 397-lbs.
Hydraulic System Totally Independent Totally Independent Totally Independent Open Center Hydraulics System Only. Tractor Remote Outlet. 3.7 - 5.6 GPM Flow Range Flow Control Valve Kit Comes Standard on Current Models
Attachment Method Cat. I/II, 3 Pt. Mount Cat. II, 3 Pt. Mount Cat. II, 3 Pt.Mount Cat. I, 3 Pt. Mount
Controls Cable Controlled Quick Detach (QD) Cable Controlled Quick Detach (QD) Cable Controlled (QD) /XTC Electronic Controls Cable Controlled
Max Reach, Horizontal (A) 14-feet 1-inch 16-feet 5-inches 18-feet 1-inch 12-feet 4-inches
Max Reach, Vertical (B) 13-feet 2-inches 14-feet 6-inches 16-feet 1-inch 7-feet 2-inches
Max Height, Horizontal (C) 13-feet 5-inches 15-feet 9-inches 17-feet 5-inches 10-feet 6-inches
Max Height, Vertical (D) 13-feet 9-inches 20-feet 8-inches 22-feet 4-inches 16-feet 3-inches
Max Depth, 45° (E) 5-feet 4-inches 7-feet 3-inches 8-feet 2-inches 4-feet 6-inches
FLAIL HEAD: RMB1445-1 RMB1660-1 RMB1865-1
Tractor Engine HP/Weight (Min.) 45 HP/4410-lbs. 60 HP/6614-lbs. 65 HP/7716-lbs.
Rotor / Knife Type Super Cut/Universal Super Cut / F91 Competition knives or Multi-Cut / Competition
Typical Application Grass, Light Brush Hedge Cutting, Grass Hedge Cutting, Grass
Cutting Capacity 1-inch Diameter 1 1/2-inch Diameter 2-inches Diameter
Cutting Width 39-inches 47-inches 47-inches
CUTTER BAR: RMB1445-1 RMB1660-1 RMB1865-1
Tractor Engine HP/Weight (Min.) 45 HP/4410-lbs. 60 HP/6614-lbs. 65 HP/7716-lbs.
Cutter Type Sickle Bar Sickle Bar Sickle Bar
Cutting Capacity Diameter 1 1/4-inch Diameter 1 1/4-inch Diameter 1 1/4-inch Diameter
Cutting Width 59-inch 59-inch 59-inch
ROTARY HEAD RMB1445-1 RMB1660-1 RMB1865-1
Tractor Engine HP/Weight (Min.) Not Available for use on RMB1445 85 HP/7614-lbs. 85 HP/8716-lbs.
Typical Application N/A Grass/Brush Grass/Brush
Cutting Capacity N/A 4-inches Diameter 4-inches Diameter
Cutting Width N/A 60-inches 60-inches
* For Rotary Head, protective screen material must be installed.